CN102074888A - Self-frequency doubling laser with function of single beam laser output or linear laser output - Google Patents
Self-frequency doubling laser with function of single beam laser output or linear laser output Download PDFInfo
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Abstract
The invention provides a self-frequency doubling laser with function of single beam laser output or linear laser output. The self-frequency doubling laser comprises pumping sources, an optical crystal, laser resonators and crystal cooling and temperature control devices with functions of heat dissipation and temperature control, wherein the two end faces of a slab of the self-frequency doubling crystal are optically polished and plated with high fundamental frequency laser and frequency doubling laser transmissive films; one surface of the slab-shaped self-frequency doubling crystal is placed on the first crystal cooling and temperature control device; the pumping sources at least aim at one surface of the self-frequency doubling crystal and enter; high pump light transmissive films are plated on the parts where the pump light enters; the pump light carries out pumping and is fully absorbed; and the fundamental frequency laser and the frequency doubling laser are ensured to be propagated in the crystal in the shape like a Chinese character yi or zhi, thus implementing single beam laser output or linear laser output. The laser provided by the invention has the following advantages: enlarging the effective cooling area of the crystal, being beneficial to efficient heat dissipation and accurate temperature control of the crystal, reducing the internal heat gradient of the crystal and ensuring the frequency doubling process to better meet the phase matching requirement. Besides, the laser can implement single beam laser output or linear laser output.
Description
Technical field
The present invention relates to the all-solid state laser field, particularly a kind of based on the lath-shaped self-frequency-doubling crystal, have the solid state laser of single Shu Jiguang output or linear array laser output.
Background technology
Some crystal not only has nonlinear characteristic, can carry out nonlinear frequency transformation, and when mixing rare earth activation ion in this matrix, also can be used as the laser gain material.This multifunctional crystal can be used to produce basic frequency laser, and by the nonlinear effect of self this fundamental frequency light is carried out frequency multiplication, thereby produces double-frequency laser output, therefore is called as the self-frequency-doubling crystal.Laser based on the self-frequency-doubling crystal is called as self-frequency-doubling laser., compact conformation strong owing to its composite functional, stability be high to be subjected to people's favor.
At present, self-frequency-doubling laser mostly is end pumping bulk or rhabdolith mode [1.1 W CWself-frequency-doubled diode-pumped Yb:YAl
3(BO
3)
4Laser, Peter Dekker, Judith M.Dawes, James A.Piper, Yaogang Liu, Jiyang Wang, OpticsCommunications, 195 (2001) 431-436].Under this pump mode, vertically thermal gradient is big in the crystal, has influenced fundamental frequency light beam quality and shg efficiency.
Summary of the invention
The objective of the invention is in the present self-frequency-doubling laser crystal vertically thermal gradient big, from the not high problem of shg efficiency; Thereby provide a kind of the self-frequency-doubling crystal is designed to lath-shaped, make laser self-frequency-doubling laser along single Shu Jiguang output of having of " one " font or the propagation of " it " word or linear array output in crystal.This laser uses the lath-shaped self-frequency-doubling crystal, and on the one hand, the active cooling surface that has increased crystal is long-pending, helps crystal high efficiency and heat radiation and accurate temperature controlling, reduces thermal gradient in the crystal, makes the frequency multiplication process satisfy the phase matched requirement better; On the other hand, not only can realize single Shu Jiguang output, also can realize linear array laser output.
The object of the present invention is achieved like this:
Provided by the invention have a self-frequency-doubling laser that single Shu Jiguang output, laser are propagated along " one " font in crystal, comprise first pumping source and second pumping source, optical crystal, laserresonator A mirror, laserresonator B mirror and have the first crystal temperature cooling of heat radiation and temperature controlling function; It is characterized in that described optical crystal is the self-frequency-doubling crystal, described self-frequency-doubling crystal is made into the lath-shaped of length L * width W * thickness H, and the sliced crystal length direction is optical direction for self-frequency-doubling crystal's phase matched direction; The end face 11 at two of this self-frequency-doubling crystal's lath is through optical polish and plate film for fundamental frequency light and the high transmission of frequency doubled light; The self-frequency-doubling crystal's of described lath-shaped a face is placed on the first crystal temperature cooling, and the face that described pumping source is aimed at the self-frequency-doubling crystal carries out pumping, and the plating of the pump light place of entering is to the saturating film of pump light height, carries out pumping and is fully absorbed; The film of described laserresonator A mirror and laserresonator B mirror is plated in respectively on the end face at self-frequency-doubling crystal two of described lath-shaped, perhaps place independently laserresonator A mirror and laserresonator B mirror respectively in end face (being the two ends on the long limit of self-frequency-doubling crystal of the lath-shaped) outside at self-frequency-doubling crystal two of described lath-shaped, make basic frequency laser and double-frequency laser in crystal, propagate, realize single Shu Jiguang output along " one " word.
In above-mentioned technical scheme, any face that described pumping source is aimed at the self-frequency-doubling crystal carry out pumping refer to pumping source to lath-shaped self-frequency-doubling crystal's two end surfaces or wherein an end face carry out pumping, to lath-shaped self-frequency-doubling crystal front and back sides or wherein a side carry out pumping, carry out pumping or carry out pumping at the upper and lower surface place of lath-shaped self-frequency-doubling crystal two end portion in the upper surface large tracts of land of the non-chill surface of slab crystal.
In above-mentioned technical scheme, also comprise the second crystal temperature cooling, the described second crystal temperature cooling is arranged on another surface of self-frequency-doubling crystal.
Provided by the invention have a self-frequency-doubling laser that single Shu Jiguang output or linear array laser output, laser are propagated along " it " font in crystal, comprise first pumping source, optical crystal, laserresonator and have the first crystal temperature cooling of heat radiation and temperature controlling function; It is characterized in that, described optical crystal is the self-frequency-doubling crystal, described self-frequency-doubling crystal is made into the lath-shaped of length L * width W * thickness H, and the end face 11 at two of the self-frequency-doubling crystal of this lath-shaped (being the two ends on the long limit of self-frequency-doubling crystal of lath-shaped) is cut into the inclined-plane; Upper surface or lower surface bonding first substrate this self-frequency-doubling crystal, perhaps upper surface and lower surface are distinguished bonding first substrate and second substrate, perhaps upper surface and the lower surface this self-frequency-doubling crystal plates for the high anti-film of fundamental frequency light, perhaps the upper surface this self-frequency-doubling crystal plates for the film that fundamental frequency light is high instead, frequency doubled light is high, and lower surface plates for the high anti-film of fundamental frequency light; And at this self-frequency-doubling crystal's a the mounted on surface first crystal temperature cooling, perhaps the first crystal temperature cooling and the second crystal temperature cooling are installed in respectively on 2 surfaces of this self-frequency-doubling crystal; The face that described first pumping source is aimed at described self-frequency-doubling crystal carries out pumping, or enters pumping in the upper surface large tracts of land of the non-chill surface of slab crystal, and the pump light place of entering plating is to the high saturating film of pump light, carries out pumping and is fully absorbed; The film of described laserresonator A mirror and laserresonator B mirror is plated in respectively on the end face at self-frequency-doubling crystal two of described lath-shaped, perhaps place independently laserresonator A mirror and laserresonator B mirror respectively in end face (being the two ends on the long limit of self-frequency-doubling crystal of the lath-shaped) outside at self-frequency-doubling crystal two of described lath-shaped, make basic frequency laser and double-frequency laser in crystal, propagate along " it " word, frequency doubled light becomes linear array output on the self-frequency-doubling crystal's of lath-shaped surface, or becomes single Shu Jiguang output at end face;
Wherein, described self-frequency-doubling crystal's cut direction is: this self-frequency-doubling crystal's front and back sides (face of length L * thickness H) is parallel to two bigger phase matched directions of non linear coefficient, and (θ 1, φ 1) and (θ 2, φ 2) determined plane, (θ 1 perpendicular to these two phase matched directions for self-frequency-doubling crystal's upper and lower surface, φ 1) and the bisector of (θ 2, and φ 2);
In the technique scheme, also comprise second pumping source, the end face 11 that described first pumping source and described second pumping source output light is aimed at two of this lath-shaped self-frequency-doubling crystal respectively carries out pumping, aim at this lath-shaped self-frequency-doubling crystal front and back sides respectively carries out pumping, perhaps carries out pumping at the upper and lower surface place of this lath-shaped self-frequency-doubling crystal two end portion.
In the technique scheme, described self-frequency-doubling crystal's end face oblique angle is: the end face oblique angle is x, wherein nsin (α/2-x)=sin (90 °-x), n is self-frequency-doubling crystal's a refractive index, α is the angle of the both direction light propagated along " it " font among the self-frequency-doubling crystal; Make basic frequency laser and double-frequency laser in crystal, propagate, realize having the self-frequency-doubling laser of single Shu Jiguang output along " it " word.When the resonant cavity film directly was plated in crystal end-face, the end face oblique angle was α/2.
In the technique scheme, be coated with on the described laserresonator A mirror for fundamental frequency light high reflectance, for the film of frequency doubled light high-transmission rate; Plate for fundamental frequency light high reflectance, for the film of frequency doubled light high reflectance at described laserresonator B mirror.
In the technique scheme, the described first laserresonator A, the second laserresonator B mirror, can be respectively plano-concave mirror, average mirror, planoconvex lens, quartz wafer matrix, materials such as optical glass perhaps can directly be produced on it on strip type self-frequency-doubling crystal end face.Described laserresonator has the laserresonator of positive feedback effect for what be made up of A, B mirror to light.
In the technique scheme, described self-frequency-doubling crystal is neodymium-doped three line borate oxygen yttrium crystal (hereinafter to be referred as Nd:YCOB), neodymium-doped three line borate oxygen yttrium gadolinium crystals (hereinafter to be referred as Nd:GdCOB) or mixes ytterbium tetraborate aluminium yttrium crystal (hereinafter to be referred as Yb:YAB).
In the technique scheme, described substrate is the material of refractive index less than nsin (α/2), and for example sapphire, hafnium oxide (are called for short H
fO
2) material, wherein n is self-frequency-doubling crystal's a refractive index, α is the angle of the both direction light propagated along " it " font among the self-frequency-doubling crystal, thereby makes fundamental frequency light and frequency doubled light produce total reflection on the upper and lower surface of crystal and be limited in propagating in the crystal; Optical polish also can be carried out in two surfaces of slab crystal, plates the high reflectance of deielectric-coating or metal film have to(for) fundamental frequency light and frequency doubled light, makes fundamental frequency light and frequency doubled light produce total reflection on the upper and lower surface of crystal and is limited in propagating in the crystal.
In the technique scheme, described pumping source is self-frequency-doubling crystal's a absorbing wavelength, can be as the pumping source wavelength of Nd:YCOB crystal and Nd:GdCOB crystal at 808nm～813nm wave band.
A kind of lath selfdouble frequency solid state laser provided by the invention compared with prior art has following advantage:
Self-frequency-doubling laser with single Shu Jiguang output or linear array output provided by the invention, owing to used the self-frequency-doubling crystal of lath-shaped, at first optical crystal is the self-frequency-doubling crystal, use single crystal to realize laser and non-linear two kinds of functions, have advantages such as compact conformation, saving cost.
The second, because it is long-pending to have increased self-frequency-doubling crystal's active cooling surface, help self-frequency-doubling crystal's high efficiency and heat radiation and accurate temperature controlling, reduce thermal gradient in the self-frequency-doubling crystal, make the frequency multiplication process satisfy the phase matched requirement better;
This lath self-frequency-doubling laser provided by the invention not only can be realized single Shu Jiguang output, also can realize single linear array laser output or linear array laser output, is more conducive to be applied in fields such as laser display.
Description of drawings
Below, in conjunction with the accompanying drawings and embodiments the present invention is described in detail
Fig. 1 gives the laser structure schematic diagram that single bundle laser beam goes out that has of the present invention is shown
Fig. 2 is schematic diagram profile pump, that realize the self-frequency-doubling laser of linear array laser output that the present invention is based on the lath-shaped self-frequency-doubling crystal
Fig. 3 is the I class phase matching angle that the 1060nm frequency multiplication of self-frequency-doubling crystal Nd:YCOB in the embodiment of the invention 2 produces 530nm
Fig. 4 shows the cut direction schematic diagram of Nd:YCOB crystal among the embodiment 2;
Fig. 5 carries out pumping for the employing that the embodiment of the invention 3 is made to two end faces of self-frequency-doubling crystal laser structure schematic diagram;
The laser structure schematic diagram that Fig. 6 carries out pumping for the end, the close left and right sides in self-frequency-doubling crystal's upper and lower surface of lath-shaped that the embodiment of the invention 4 is made;
Drawing is described as follows:
1-is the self-frequency-doubling crystal
The 2-01-first backing material 2-02-second backing material
The 3-01 first crystal temperature cooling 3-02-second crystal temperature cooling
The 4-01 first pumping source 4-02-second pumping source
The 5-01 first pumping source heat abstractor 5-02-second pumping source heat abstractor
The 6-01 first pump light beam 6-02-second pump light beam
7-resonant cavity A mirror (outgoing mirror) 8-resonant cavity B mirror (high reflective mirror)
The fixture of the fixture 9-02-second resonator mirror B of the 9-01-first resonator mirror A
10-is the end face at laser outbound course 11-lath two
12-self-frequency-doubling crystal's upper surface
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, the present invention is described in further details below in conjunction with the drawings and specific embodiments.
With reference to figure 1, present embodiment is manufactured a kind of lath self-frequency-doubling laser based on the Nd:YCOB crystal, and endovenous laser is propagated along " one " font in crystal, realizes single Shu Jiguang output.
It is the Nd:YCOB crystal of 8at.% that self-frequency-doubling crystal 1 adopts doping content, and the lath-shaped that this self-frequency-doubling crystal is made into length L * width W * thickness H promptly is processed into 5 * 1 * 3mm
3Lath-shaped, self-frequency-doubling crystal's 1 horizontal direction (along the length L direction) is the phase matched direction of effective nonlinear coefficient maximum.The end face 11 at two of this self-frequency-doubling crystal's lath is through optical polish and plate film for fundamental frequency light and the high transmission of frequency doubled light.
The first crystal temperature cooling 3-01 of present embodiment adopts the general crystal temperature cooling of the industry.
Self-frequency-doubling crystal 1 places and is fixed on the first crystal temperature cooling 3-01 with heat radiation and temperature controlling function.The first pumping source 4-01 is placed on the first pumping source heat abstractor 5-01, the first pumping source 4-01 aims at self-frequency-doubling crystal 1 upper surface 12 (face of length L * width W), carry out pumping and fully absorbed (that is to say pumping source aim at self-frequency-doubling crystal's a face carry out pumping can, if it is also passable to carry out pumping at lower surface, just the first crystal temperature cooling is installed in this self-frequency-doubling crystal's 1 upper surface 12, if carry out from the side pumping also can), the resonant cavity A mirror 7 resonant cavity B mirrors 8 of laserresonator, be placed on end face 11 (being the two ends on the long limit of self-frequency-doubling crystal of the lath-shaped) outside at self-frequency-doubling crystal two of lath-shaped respectively, the first pump light beam 6-01 enters crystal from the pumping of self-frequency-doubling crystal's upper surface large tracts of land.Resonant cavity A mirror 7, resonant cavity B mirror 8 form resonant cavity, and basic frequency laser forms resonance in the chamber, and frequency doubled light is seen Fig. 1 along the 10 direction outgoing of laser outbound course.
Wherein, resonant cavity A mirror 7 resonant cavity B mirrors 8 can be plano-concave mirror, average mirror, planoconvex lens, quartz wafer matrix, and materials such as optical glass perhaps directly are produced on it on strip type self-frequency-doubling crystal end face, all are a kind of embodiment of the present invention.
Embodiment 2
Referring to Fig. 2, present embodiment is manufactured a kind of solid state laser based on lath-shaped Nd:YCOB self-frequency-doubling crystal, and endovenous laser is propagated along " it " font in crystal, and frequency doubled light brings out at outgoing mirror A and penetrates, and has realized single Shu Jiguang output.
The first substrate 2-01, the second substrate 2-02 are a H
fO
2Sheet material; The size of the first substrate 2-01, the second substrate 2-02 and self-frequency-doubling crystal 1 equal and opposite in direction.The first crystal temperature cooling 3-01, the second crystal temperature cooling 3-02, the crystal temperature cooling of the routine of buying on the employing market.Adopting centre wavelength is near the first pumping source 4-01, second pumping source 4-02, for example semiconductor laser of 811nm.The first pumping source heat abstractor 5-01, the second pumping source heat abstractor 5-02 are the laser corollary equipments.Resonant cavity A mirror 7 (outgoing mirror), resonant cavity B mirror 8 (high reflective mirror) all adopts average mirror, is coated with fundamental frequency light high-reflecting film and frequency doubled light high transmittance film on the resonant cavity A mirror 7, is coated with fundamental frequency light high-reflecting film and frequency doubled light high-reflecting film on the resonant cavity B mirror 8.
It is the Nd:YCOB crystal of 8at.% that self-frequency-doubling crystal 1 adopts doping content, and this self-frequency-doubling crystal 1 is made into 12 * 2 * 6mm
3Lath-shaped, upper and lower surface difference bonding first substrate and second substrate this self-frequency-doubling crystal, the first crystal temperature cooling 3-01 is installed on first substrate, the second crystal temperature cooling 3-02 is installed on second substrate, and this is that those skilled in the art can be implemented.Wherein, present embodiment self-frequency-doubling crystal's cut direction is determined as follows:
Select I class phase matched mode, the 1060nm laser freuqency doubling of the Nd:YCOB crystal that provides by Fig. 3 produces the I class phase matching angle of 530nm laser, selects bigger phase matched the direction ((θ of two effective nonlinear coefficients of Nd:YCOB crystal
1=67 °,
) and (θ
2=145 °,
)), as the direction of laser generation in the crystal.These two determined planes of phase matched direction are as strip type self-frequency-doubling crystal's front and back sides, perpendicular to the plane of the bisector of these two the phase matched directions upper and lower surface as the strip type self-frequency-doubling crystal.By this method Nd:YCOB is processed into 12 * 2 * 6mm
3Lath-shaped, wherein Nd:YCOB self-frequency-doubling crystal length is 12mm, thickness is 2mm, width is 6mm.These two phase matched direction (θ
1=67 °,
) and (θ
2=145 °,
) angle can obtain by space geometry, promptly α is 128 °.The Nd:YCOB crystal is about 1.667 for the refractive index of fundamental frequency light 1060nm, refractive index for frequency doubled light 530nm is about 1.6863, produces total reflection and is limited in wherein by two selected phase matched direction (θ in Nd:YCOB self-frequency-doubling crystal upper and lower surface in order to make fundamental frequency light and frequency doubled light
1=67 °,
) and (θ
2=145 °,
) propagate, need Nd:YCOB crystal upper and lower surface respectively bonding or refractive index of optical cement less than 1.505 backing material.Crystal end-face oblique angle x by formula nsin (α/2-x)=(90 °-x) calculate is 34.3 ° to sin.See Fig. 4..The Nd:YCOB crystal is after said method is made into strip type self-frequency-doubling crystal 1, left and right sides both ends of the surface are through optical polish, and plate the anti-reflection film that has high-transmission rate for frequency doubled light and fundamental frequency light, be placed on afterwards in the crystal temperature cooling 3 fix, heat radiation and temperature control.
The first pumping source 4-01 in the present embodiment, the second pumping source 4-02 are that centre wavelength is near the semiconductor laser the 811nm, this pumping source is placed on respectively to be fixed on the first pumping source heat abstractor 5-01, the second pumping source heat abstractor 5-02 and dispels the heat, the position that pumping source is fixed makes 811nm pump light effectively be coupled in the crystal from the crystal front and back sides and is absorbed, and realizes pumping process; This is that those skilled in the art can be implemented.
Laserresonator in the present embodiment has the laserresonator of positive feedback effect for what be made up of resonant cavity A mirror 7, resonant cavity B mirror 8 to light; Laserresonator A mirror and laserresonator B mirror are placed on end face 11 (being the two ends on the long limit of self-frequency-doubling crystal of the lath-shaped) outside at self-frequency-doubling crystal two of described lath-shaped respectively, the first pumping source 4-01 and the second pumping source 4-02 aim at this self-frequency-doubling crystal's front and back sides (face of length L * thickness H) respectively, promptly adopt the mode of profile pump, as shown in Figure 2, pump light effectively is coupled in the crystal and is absorbed, and realizes that pumping process makes basic frequency laser and double-frequency laser propagate along " it " word in crystal.Frequency doubled light becomes linear array laser output 10 on the self-frequency-doubling crystal's of lath-shaped surface.Resonant cavity A mirror (outgoing mirror) 7 is that resonant cavity B mirror (high reflective mirror) 8 can be plano-concave mirror, average mirror, planoconvex lens, quartz wafer matrix or directly it is produced on the strip type self-frequency-doubling crystal end face.Resonant cavity A mirror (outgoing mirror) 7 resonant cavity B mirrors (high reflective mirror) 8 are installed in respectively on the fixture 9-02 of the fixture 9-01 of the first resonator mirror A and the second resonator mirror B, this is that those skilled in the art can be implemented.Resonant cavity A mirror plates for fundamental frequency light high reflectance, for the film of frequency doubled light high-transmission rate, and resonant cavity B mirror plates for fundamental frequency light high reflectance, for the film of frequency doubled light high reflectance.
In the present embodiment, produce total reflection and be limited in " it " font propagation in edge in the crystal in Nd:YCOB self-frequency-doubling crystal upper and lower surface, also can plate respectively for fundamental frequency light and the two high-reflecting films of frequency doubled light in the crystal upper and lower surface in order to make fundamental frequency light and frequency doubled light.
Present embodiment is manufactured a kind of lath self-frequency-doubling laser based on the Nd:GdCOB crystal.Present embodiment is similar to Example 2, and endovenous laser is propagated along " it " font in crystal, realizes linear array output.Be mainly with the structure difference of embodiment 2:
The one,, it is the Nd:GdCOB crystal of 8at.% that self-frequency-doubling crystal's material adopts doping content.
The 2nd,, pump mode changes two end pumping of lath into by the front and back sides pumping among the embodiment 2, and promptly the first pumping source 4-01 and the second pumping source 4-02 aim at this self-frequency-doubling crystal's the end face 11 at two respectively as the laser pumping plane of incidence.
The 3rd,, the frequency doubled light exit direction is by changing in the outgoing of self-frequency-doubling crystal's upper surface along left and right sides end face direction outgoing among the embodiment 2.The advantage of this way of output is that one side can realize linear array output, on the one hand, makes the self-absorption loss reduce owing to what frequency doubled light was propagated in crystal apart from reducing, and has improved the frequency doubled light delivery efficiency.
The 4th, because the change of frequency doubled light exit direction during sliced crystal, only needs to make that the direction on " it " font deflection satisfies phase matched, be the maximum direction of effective nonlinear coefficient.
The 5th,, in crystal, propagate formation resonance in order to make fundamental frequency light along " it " font, and realize that frequency doubled light becomes the linear array outgoing at the crystal upper surface, adopt not in " self-frequency-doubling crystal's upper and lower surface bonding or refractive index of optical cement less than 1.505 other crystalline materials or backing material " respectively, but plate for the film that fundamental frequency light is high instead, frequency doubled light is high at Nd:GdCOB crystal upper surface, lower surface plates for the high anti-film of fundamental frequency light.
The 6th,, the first crystal temperature cooling 3-01 only is installed on self-frequency-doubling crystal's lower surface, only dispel the heat to crystal is one-sided.
The concrete structure of present embodiment is with reference to figure 5.
Embodiment 4
Present embodiment is manufactured a kind of lath self-frequency-doubling laser based on the Yb:YAB crystal.Present embodiment is similar to Example 3, and difference mainly contains 3 points: the one, and self-frequency-doubling crystal's material changes the Yb:YAB crystal that doping content is 6at.% into, and crystal-cut and method for production are similar to Example 3; The 2nd, pumping source changes the fiber laser that centre wavelength is 790nm into; The 3rd, pump mode changes in the end, the close left and right sides of slab crystal upper and lower surface and entering, and therefore, at the high transmittance film of the pump light place of entering of slab crystal plating for pump light, left and right sides end face plates the high-reflecting film for pump light.
The concrete structure of present embodiment is with reference to figure 6.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and modification according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. self-frequency-doubling laser with single Shu Jiguang output comprises first pumping source and second pumping source, optical crystal, laserresonator A mirror, laserresonator B mirror and has the first crystal temperature cooling of heat radiation and temperature controlling function; It is characterized in that described optical crystal is the self-frequency-doubling crystal, described self-frequency-doubling crystal is made into the lath-shaped of length L * width W * thickness H, and length direction is self-frequency-doubling crystal's a phase matched direction during cutting, is optical direction; The end face at two of this self-frequency-doubling crystal's lath (11) is through optical polish and plate film for fundamental frequency light and the high transmission of frequency doubled light; The self-frequency-doubling crystal of described lath-shaped is placed on the first crystal temperature cooling, the face that described pumping source is aimed at the self-frequency-doubling crystal carries out pumping, and in the pump light place of entering plating to the high saturating film of pump light, carry out pumping and fully absorbed, the film of described laserresonator A mirror and laserresonator B mirror is plated in respectively on the end face at self-frequency-doubling crystal two of described lath-shaped, perhaps place independently laserresonator A mirror and laserresonator B mirror respectively in end face (11) outside at self-frequency-doubling crystal two of described lath-shaped, make basic frequency laser and double-frequency laser in crystal, propagate, realize single Shu Jiguang output along " one " word;
Wherein, be for fundamental frequency light high reflectance, for the film of frequency doubled light high-transmission rate at the film of described laserresonator A mirror; At the film of described laserresonator B mirror is for fundamental frequency light high reflectance, for the film of frequency doubled light high reflectance.
2. the self-frequency-doubling laser with single Shu Jiguang output according to claim 1 is characterized in that also comprise the second crystal temperature cooling, the described second crystal temperature cooling is arranged on another surface of self-frequency-doubling crystal.
3. the self-frequency-doubling laser with single Shu Jiguang output according to claim 1, it is characterized in that, any face that described pumping source is aimed at the self-frequency-doubling crystal carry out pumping refer to pumping source to lath-shaped self-frequency-doubling crystal's two end surfaces or wherein an end face carry out pumping, to lath-shaped self-frequency-doubling crystal front and back sides or wherein a side carry out pumping, carry out pumping or carry out pumping at the upper and lower surface place of lath-shaped self-frequency-doubling crystal two end portion in the upper surface large tracts of land of the non-chill surface of slab crystal.
4. the self-frequency-doubling laser with single Shu Jiguang output according to claim 1, it is characterized in that, the described first laserresonator A or the second laserresonator B mirror, be respectively plano-concave mirror, average mirror, planoconvex lens, quartz wafer matrix, materials such as optical glass perhaps directly are produced on it on strip type self-frequency-doubling crystal end face.
5. the self-frequency-doubling laser with single Shu Jiguang output according to claim 1, it is characterized in that described self-frequency-doubling crystal is for neodymium-doped three line borate oxygen yttrium crystal Nd:YCOB, neodymium-doped three line borate oxygen yttrium gadolinium crystal Nd:GdCOB or mix ytterbium tetraborate aluminium yttrium crystal Yb:YAB.
6. self-frequency-doubling laser with linear array laser output comprises first pumping source, optical crystal, laserresonator and has the first crystal temperature cooling of heat radiation and temperature controlling function; It is characterized in that described optical crystal is the self-frequency-doubling crystal, described self-frequency-doubling crystal is made into the lath-shaped of length L * width W * thickness H, and the end face 11 at two of the self-frequency-doubling crystal of this lath-shaped is cut into the inclined-plane; Upper surface or lower surface bonding first substrate this self-frequency-doubling crystal, perhaps upper surface and lower surface are distinguished bonding first substrate and second substrate, perhaps upper surface and the lower surface this self-frequency-doubling crystal plates for the high anti-film of fundamental frequency light, perhaps the upper surface this self-frequency-doubling crystal plates for the film that fundamental frequency light is high instead, frequency doubled light is high, and lower surface plates for the high anti-film of fundamental frequency light; And at this self-frequency-doubling crystal's a the mounted on surface first crystal temperature cooling, perhaps the first crystal temperature cooling and the second crystal temperature cooling are installed in respectively on 2 surfaces of this self-frequency-doubling crystal; The face that described first pumping source is aimed at described self-frequency-doubling crystal carries out pumping, or enters pumping in the upper surface large tracts of land of the non-chill surface of slab crystal, and the pump light place of entering plating is to the high saturating film of pump light, carries out pumping and is fully absorbed; The film of described laserresonator A mirror and laserresonator B mirror is plated in respectively on the end face at self-frequency-doubling crystal two of described lath-shaped, make basic frequency laser and double-frequency laser in crystal, propagate along " it " word, frequency doubled light becomes linear array output on the self-frequency-doubling crystal's of lath-shaped surface, or becomes single Shu Jiguang output at end face;
Wherein, described self-frequency-doubling crystal's cut direction is: this self-frequency-doubling crystal's front and back sides is parallel to two bigger phase matched directions of non linear coefficient, and (θ 1, φ 1) and (θ 2, φ 2) determined plane, (θ 1 perpendicular to these two phase matched directions for this self-frequency-doubling crystal's upper and lower surface, φ 1) and the bisector of (θ 2, and φ 2);
When resonant cavity directly was plated in crystal end-face, described end face oblique angle was α/2;
Wherein, the film of described laserresonator A mirror plating is for fundamental frequency light high reflectance, for the film of frequency doubled light high-transmission rate; At the film of described laserresonator B mirror plating is for fundamental frequency light high reflectance, for the film of frequency doubled light high reflectance.
7. the self-frequency-doubling laser with linear array laser output according to claim 5, it is characterized in that, end face (11) outside that also is included in self-frequency-doubling crystal two of described lath-shaped is placed independently laserresonator A mirror and laserresonator B mirror respectively, described self-frequency-doubling crystal's end face oblique angle is: the end face oblique angle is x, wherein nsin (α/2-x)=sin (90 °-x), n is self-frequency-doubling crystal's a refractive index, and α is the angle of the both direction light that edge " it " font is propagated among the self-frequency-doubling crystal; Make basic frequency laser and double-frequency laser in crystal, propagate along " it " word.Realization has the self-frequency-doubling laser of single Shu Jiguang output;
Wherein, be coated with on the described laserresonator A mirror for fundamental frequency light high reflectance, for the film of frequency doubled light high-transmission rate; Plate for fundamental frequency light high reflectance, for the film of frequency doubled light high reflectance at described laserresonator B mirror.
8. the self-frequency-doubling laser with linear array laser output according to claim 6 is characterized in that the described first laserresonator A or the second laserresonator B mirror are respectively plano-concave mirror, average mirror, planoconvex lens, quartz wafer matrix or optical glass.
9. the self-frequency-doubling laser with linear array laser output according to claim 6, it is characterized in that described self-frequency-doubling crystal is for neodymium-doped three line borate oxygen yttrium crystal Nd:YCOB, neodymium-doped three line borate oxygen yttrium gadolinium crystal Nd:GdCOB or mix ytterbium tetraborate aluminium yttrium crystal Yb:YAB.
10. the self-frequency-doubling laser with linear array laser output according to claim 6 is characterized in that described substrate is the material of refractive index less than nsin (α/2).
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| CN103490275A (en) * | 2013-09-24 | 2014-01-01 | 中国科学院福建物质结构研究所 | 1.5-1.6 micron wave band based on bonding crystal and frequency conversion laser device thereof |
| CN108110598A (en) * | 2018-02-11 | 2018-06-01 | 中国工程物理研究院应用电子学研究所 | A kind of slab laser gain module |
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| CN109378698A (en) * | 2018-12-11 | 2019-02-22 | 山东大学 | A kind of high-power strip green (light) laser |
| CN109659806A (en) * | 2019-02-22 | 2019-04-19 | 山东大学 | A kind of temperature-insensitive type frequency-doubling crystal device and its application |
| CN109659806B (en) * | 2019-02-22 | 2020-11-06 | 山东大学 | Temperature-insensitive frequency doubling crystal device and application thereof |
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