CN102692715A - Optical pulse shaper based on multi-phase-shift multi-wavelength optical fiber grating and working method thereof - Google Patents
Optical pulse shaper based on multi-phase-shift multi-wavelength optical fiber grating and working method thereof Download PDFInfo
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Abstract
The invention discloses an optical pulse shaper based on a multi-phase-shift multi-wavelength optical fiber grating and a working method thereof. The optical pulse shaper adopts an optical frequency comb as an input light source, and comprises a circulator and a multi-phase-shift multi-wavelength optical fiber grating; control parts on wavelength, amplitude and phase of the input optical frequency comb are formed based on the multi-phase shift multi-wavelength optical fiber grating; and a frequency spectrum of the optical frequency comb is shaped to acquire output of a random static all-optical waveform. The special multi-phase-shift multi-wavelength optical fiber grating is arranged on an optical fiber, and amplitudes and phases of different spectrum lines of the input optical frequency comb are adjusted to acquire optical pulse output of a needed static waveform.
Description
Technical field
The present invention relates to shaping of light pulse device and method of work thereof, particularly based on heterogeneous shaping of light pulse device and method of work thereof of moving multi-wavelength optical fiber grating.
Background technology
In recent years, full light random waveform produces as a very novel technology, can be applied in a lot of aspects.For example the interface between backbone transport networks and big city Access Network can utilize this technology realize full light RZ sign indicating number to the conversion of NRZ sign indicating number with the raising availability of frequency spectrum; In the hypervelocity optical fiber telecommunications system, can utilize full light random waveform generating technique signal to be carried out shaping to improve the influence of chromatic dispersion, effectively improve the quality of communication system at receiving end; The principle of full light random waveform generating technique also extends in the microwave photon filter, realizes the filtering to microwave signal through the control to phase place; Can simulate the various signal source of generation based on the random waveform light pulse compositor of optical fiber, can test, can promote the development of all optical network optical-fiber network.
Up to the present, full light random waveform produces the two kinds of technology that mainly comprise: the synthetic and frequency spectrum method of operating of direct time-domain.Time domain approach uses a plurality of lag lines to produce light pulse, and frequency domain method uses devices such as body grating, array waveguide grating, fiber grating to introduce chromatic dispersion and spatial modulator or electrooptic modulator acting in conjunction.In recent years along with various enable the technology appearance; People begin to carry out " line by line " shaping pulse through each spectral line of spectrum is controlled respectively independently; Promptly the amplitude and the phase place of each root spectral line are controlled respectively, can be obtained our needed pulse signal according to the Fourier transform principle.The method that current most of experimental study work all is based on " line by line " shaping of spectrum produces any pulse signal.As utilize the wavelength components of diffraction grating in the pulse of spatial domain separated light, and with spatial light amplitude and phase-modulator it is modulated then, can obtain required output pulse signal, but its structure more complicated, loss is also bigger; Utilize the fiber grating of special construction that the spectral line of light pulse is chosen, adjust the amplitude of selected spectral line and the output that phase place obtains required waveform simultaneously, it is simple in structure, is easy to realize.
Summary of the invention
It is a kind of based on heterogeneous shaping of light pulse device and method of work thereof of moving multi-wavelength optical fiber grating that fundamental purpose of the present invention is to provide.The present invention uses optical frequency com as the input light source; According to required waveform; It is the parameter of target waveform; Utilize the heterogeneous multi-wavelength optical fiber grating that moves as to wavelength, the amplitude of input optical frequency com, the control section of phase place, obtain the light pulse output of static required waveform through frequency spectrum shaping optical frequency com.
Technical scheme of the present invention is: a kind of based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating; It is characterized in that it comprises circulator and the heterogeneous multi-wavelength optical fiber grating that moves; Said circulator has three ports, promptly be used to import optical frequency com the A port, be used to connect the heterogeneous C port that moves the B port of multi-wavelength optical fiber grating and be used for output waveform; The said heterogeneous multi-wavelength optical fiber grating that moves is made up of grating section more than two sections or two sections and the phase shift between the grating section; The grating section is the Fiber Bragg Grating FBG with different grating cycles; The length of grating section can be the same or different, and the phase place of inserting between the grating section can be the same or different.
Above-mentioned grating section can be on an optical fiber, to adopt the phase mask method to write system to form.
Above-mentioned output waveform is the light pulse of the required waveform of static state.
Based on heterogeneous method of work of moving the shaping of light pulse device of multi-wavelength optical fiber grating, it is characterized in that this method may further comprise the steps:
(1) with the A port input of optical frequency com through circulator;
(2) the B port of circulator connects the heterogeneous multi-wavelength optical fiber grating that moves; Adjust through the heterogeneous multi-wavelength optical fiber grating pair input optical frequency com that moves, adjust to amplitude spectrum and the phase spectrum distribution of required waveform consistent with phase spectrum the amplitude spectrum of the spectral line of incoming frequency comb.
The light pulse of the required waveform of the needed static state that (3) produces is exported by circulator C port.
Adjustment to optical frequency com in the above-mentioned steps (2) comprises the selection to the optical frequency com wavelength, reaches the adjustment to optical frequency com amplitude and phase place.
Above-mentioned selection to the optical frequency com wavelength is realized by the heterogeneous multi-wavelength optical fiber grating that moves; Its selected wavelength is by the heterogeneous centre wavelength decision that moves every section grating section in the multi-wavelength optical fiber grating; Promptly by the grating cycle decision of every section grating section, the spectral line of from the input optical frequency com, selecting is equidistant arrangement.
Above-mentioned adjustment to the optical frequency com amplitude is realized by the heterogeneous multi-wavelength optical fiber grating that moves; The size of its amplitude adjustment is by the heterogeneous reflectivity decision that moves every section grating section in the multi-wavelength optical fiber grating; Promptly by the grating length decision of every section grating section, the amplitude distribution of adjustment back spectral line is consistent with the amplitude distribution of output waveform spectral line.
Above-mentioned adjustment to the optical frequency com phase place is realized by the heterogeneous multi-wavelength optical fiber grating that moves; The size of its phase place adjustment is moved the phase shift decision of introducing between each grating section in the multi-wavelength optical fiber grating by heterogeneous, and the phase place of adjusted spectral line is consistent with the PHASE DISTRIBUTION of output waveform spectral line.
Principle of the present invention is: heterogeneously move that every section grating section has different centre wavelength in the multi-wavelength optical fiber grating; Be that every section grating section has the different grating cycles; Make the centre wavelength of each grating section equidistantly arrange; And corresponding with the pectination spectral line of input optical frequency com, the grating cycle through every section grating section is realized the selection to input optical frequency com spectral line; The reflectivity of every section grating section is confirmed by the amplitude of the corresponding spectral line of the amplitude of the corresponding spectral line of initial optical frequency comb and required waveform jointly; The reflectivity of every section grating section is by the grating length decision of every section grating section; The length of every section grating section is set; Make the amplitude of corresponding spectral line satisfy the requirement of needed output waveform, the adjustment through the grating segment length realizes the adjustment to selected spectral line amplitude; The phase shift of introducing between each grating section is confirmed by the phase place of the corresponding spectral line of the phase place of the corresponding spectral line of initial optical frequency comb and required output waveform jointly; Through the phase shift between each section grating section is set; Make the phase place of corresponding spectral line satisfy the requirement of required waveform, realize adjustment selected spectral line phase place.
The invention relates to the shaping of light pulse device and the method for work thereof of moving multi-wavelength optical fiber grating based on heterogeneous; A wherein heterogeneous distinguishing feature of moving each section grating section (being Fiber Bragg Grating FBG) in the multi-wavelength optical fiber grating is that the reflection wavelength of different grating section is different, and the wavelength interval equates.Through on optical fiber, writing the extraordinary heterogeneous multi-wavelength optical fiber grating that moves of system, just can realize the amplitude and the phase place of the different spectral lines of input optical frequency com are adjusted, thereby the light pulse that obtains static required waveform is exported.Cost of the present invention is low, simple in structure.
Description of drawings
Below in conjunction with embodiment the present invention is further explained.
Fig. 1 for involved in the present invention based on the heterogeneous structural representation that moves the shaping of light pulse device of multi-wavelength optical fiber grating.λ wherein
iRepresent i (i=1,2,3 ... N) centre wavelength of individual grating section, Λ representes grating cycle, P
iExpression expression i (i=1,2,3 ... The phase shift of N-1) inserting between section grating and the i+1 section grating section.
Fig. 2 for involved in the present invention based on the heterogeneous structural representation that moves the shaping of light pulse device embodiment 1 of multi-wavelength optical fiber grating.
Based on the heterogeneous work figure that moves the shaping of light pulse device embodiment 1 of multi-wavelength optical fiber grating, the repetition frequency that promptly produces is the static all-optical Gaussian waveform pulse train of 125GHz to Fig. 3 for involved in the present invention.
Fig. 4 for involved in the present invention based on the heterogeneous structural representation that moves the shaping of light pulse device embodiment 2 of multi-wavelength optical fiber grating.
Based on the heterogeneous work figure that moves the shaping of light pulse device embodiment 2 of multi-wavelength optical fiber grating, the repetition frequency that promptly produces is the static all-optical triangular pulse sequence of 125GHz to Fig. 5 for involved in the present invention.
Fig. 6 for involved in the present invention based on the heterogeneous structural representation that moves the shaping of light pulse device embodiment 3 of multi-wavelength optical fiber grating.
Based on the heterogeneous work figure that moves the shaping of light pulse device embodiment 3 of multi-wavelength optical fiber grating, the repetition frequency that promptly produces is the bilateral exponential pulse sequence of static all-optical of 12.5GHz to Fig. 7 for involved in the present invention.
Fig. 8 for involved in the present invention based on the heterogeneous structural representation that moves the shaping of light pulse device embodiment 4 of multi-wavelength optical fiber grating.
Based on the heterogeneous work figure that moves the shaping of light pulse device embodiment 4 of multi-wavelength optical fiber grating, the repetition frequency that promptly produces is the static all-optical cosine impulse sequence of 125GHz to Fig. 9 for involved in the present invention.
Wherein: 1 is optical frequency com, and 2 is circulator, and 3 are the heterogeneous multi-wavelength optical fiber grating that moves.
Embodiment
Embodiment 1:
Structure based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating is as shown in Figure 2, and wherein λ i representes i (i=1,2,3 ... 7) centre wavelength of individual grating section, P
iExpression expression i (i=1,2,3 ... The phase shift of 6) inserting between section grating and the i+1 section grating section, the heterogeneous grating effective refractive index n that moves multi-wavelength optical fiber grating
Eff=1.45, mean refractive index changes delta n=0.0001, depth of modulation s=1.
Shown in Figure 2 based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating; It is characterized in that it comprises circulator 2 and the heterogeneous multi-wavelength optical fiber grating 3 that moves; Said circulator 2 has three ports, promptly be used to import optical frequency com 1 the A port, be used to connect the heterogeneous C port that moves the B port of multi-wavelength optical fiber grating 3 and be used for output waveform.
The above-mentioned heterogeneous multi-wavelength optical fiber grating 3 that moves is made up of 6 phase shifts between 7 sections grating sections and the grating section, and parameter is seen table 1.
Above-mentioned grating section is the Fiber Bragg Grating FBG with different grating cycles, and the grating periods lambda is seen table 1.
Heterogeneous parameter of moving multi-wavelength optical fiber grating 3 is as shown in table 1.
Above-mentioned grating section can be on an optical fiber, to adopt the phase mask method to write system to form.
The waveform of above-mentioned output optical pulse is the static all-optical Gaussian waveform.
The heterogeneous multi-wavelength optical fiber grating parameter that moves among table 1 embodiment 1
Based on heterogeneous method of work of moving the shaping of light pulse device of multi-wavelength optical fiber grating, it is characterized in that this method may further comprise the steps:
(1) with the A port input of optical frequency com 1 through circulator 2;
(2) the B port of circulator 2 connects the heterogeneous multi-wavelength optical fiber grating 3 that moves, and adjusts through heterogeneous 3 pairs of inputs of multi-wavelength optical fiber grating optical frequency com 1 that moves;
(3) the needed static all-optical Gaussian waveform light pulse that produces is by the C port output of circulator 2.
Adjustment to optical frequency com 1 in the above-mentioned steps (2) comprises the selection to optical frequency com 1 wavelength, reaches the adjustment to optical frequency com 1 amplitude and phase place.
Above-mentioned selection to optical frequency com 1 wavelength is realized by the heterogeneous multi-wavelength optical fiber grating 3 that moves; Its selected wavelength is by the heterogeneous centre wavelength decision that moves every section grating section in the multi-wavelength optical fiber grating 3; Promptly by the grating cycle decision of every section grating section, the spectral line of from input optical frequency com 1, selecting is equidistant arrangement.
Above-mentioned adjustment to optical frequency com 1 amplitude is realized by the heterogeneous multi-wavelength optical fiber grating 3 that moves; The size of its amplitude adjustment is by the heterogeneous reflectivity decision that moves every section grating section in the multi-wavelength optical fiber grating 3; Promptly by the grating length decision of every section grating section, the amplitude distribution of adjustment back spectral line is consistent with the amplitude distribution of output waveform spectral line.
Above-mentioned adjustment to optical frequency com 1 phase place is realized by the heterogeneous multi-wavelength optical fiber grating 3 that moves; The size of its phase place adjustment is moved the phase shift decision of introducing between each grating section in the multi-wavelength optical fiber grating 3 by heterogeneous, and the phase place of adjusted spectral line is consistent with the PHASE DISTRIBUTION of output waveform spectral line.
The above-mentioned repetition frequency that produces based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating is the static all-optical Gaussian waveform pulse train of 125GHz (cycle 8ps), and is as shown in Figure 3.
Embodiment 2:
Structure based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating is as shown in Figure 4, wherein λ
iRepresent i (i=1,2,3 ... 25) centre wavelength of individual grating section, P
iExpression expression i (i=1,2,3 ... The phase shift of 24) inserting between section grating and the i+1 section grating section, the heterogeneous grating effective refractive index n that moves multi-wavelength optical fiber grating
Eff=1.45, mean refractive index changes delta n=0.0001, depth of modulation s=1.
As shown in Figure 4 based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating; It is characterized in that it comprises circulator 2 and the heterogeneous multi-wavelength optical fiber grating 3 that moves; Said circulator 2 has three ports, promptly be used to import optical frequency com 1 the A port, be used to connect the heterogeneous C port that moves the B port of multi-wavelength optical fiber grating 3 and be used for output waveform.
The above-mentioned heterogeneous multi-wavelength optical fiber grating 3 that moves is made up of 24 phase shifts between 25 sections grating sections and the grating section, and parameter is seen table 2.
Above-mentioned grating section is the Fiber Bragg Grating FBG with different grating cycles, and the grating periods lambda is seen table 2.
Heterogeneous parameter of moving multi-wavelength optical fiber grating 3 is as shown in table 2.
Above-mentioned grating section can be on an optical fiber, to adopt the phase mask method to write system to form.
Above-mentioned output waveform is the static all-optical triangular waveform.
The heterogeneous multi-wavelength optical fiber grating parameter that moves among table 2 embodiment 2
Based on heterogeneous method of work of moving the shaping of light pulse device of multi-wavelength optical fiber grating, it is characterized in that this method may further comprise the steps:
(1) with the A port input of optical frequency com 1 through circulator 2;
(2) the B port of circulator 2 connects the heterogeneous multi-wavelength optical fiber grating 3 that moves, and adjusts through heterogeneous 3 pairs of inputs of multi-wavelength optical fiber grating optical frequency com 1 that moves;
(3) the needed static all-optical triangular waveform light pulse that produces is by the C port output of circulator 2.
Adjustment to optical frequency com 1 in the above-mentioned steps (2) comprises the selection to optical frequency com 1 wavelength, reaches the adjustment to optical frequency com 1 amplitude and phase place.
Above-mentioned selection to optical frequency com 1 wavelength is realized by the heterogeneous multi-wavelength optical fiber grating 3 that moves; Its selected wavelength is by the heterogeneous centre wavelength decision that moves every section grating section in the multi-wavelength optical fiber grating 3; Promptly by the grating cycle decision of every section grating section, the spectral line of from input optical frequency com 1, selecting is equidistant arrangement.
Above-mentioned adjustment to optical frequency com 1 amplitude is realized by the heterogeneous multi-wavelength optical fiber grating 3 that moves; The size of its amplitude adjustment is by the heterogeneous reflectivity decision that moves every section grating section in the multi-wavelength optical fiber grating 3; Promptly by the grating length decision of every section grating section, the amplitude distribution of adjustment back spectral line is consistent with the amplitude distribution of output waveform spectral line.
Above-mentioned adjustment to optical frequency com 1 phase place is realized by the heterogeneous multi-wavelength optical fiber grating 3 that moves; The size of its phase place adjustment is moved the phase shift decision of introducing between each grating section in the multi-wavelength optical fiber grating 3 by heterogeneous, and the phase place of adjusted spectral line is consistent with the PHASE DISTRIBUTION of output waveform spectral line.
The above-mentioned repetition frequency that produces based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating is the static all-optical triangular pulse sequence of 125GHz (cycle 8ps), and is as shown in Figure 5.
Embodiment 3:
Structure based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating is as shown in Figure 6, wherein λ
iRepresent i (i=1,2,3 ... 41) centre wavelength of individual grating section, P
iExpression expression i (i=1,2,3 ... The phase shift of 40) inserting between section grating and the i+1 section grating section, the heterogeneous grating effective refractive index n that moves multi-wavelength optical fiber grating
Eff=1.45, mean refractive index changes delta n=0.0001, depth of modulation s=1.
As shown in Figure 6 based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating; It is characterized in that it comprises circulator 2 and the heterogeneous multi-wavelength optical fiber grating 3 that moves; Said circulator 2 has three ports, promptly be used to import optical frequency com 1 the A port, be used to connect the heterogeneous C port that moves the B port of multi-wavelength optical fiber grating 3 and be used for output waveform.
The above-mentioned heterogeneous multi-wavelength optical fiber grating 3 that moves is made up of 40 phase shifts between 41 sections grating sections and the grating section, and parameter is seen table 2.
Above-mentioned grating section is the Fiber Bragg Grating FBG with different grating cycles, and the grating periods lambda is seen table 3.
Heterogeneous parameter of moving multi-wavelength optical fiber grating 3 is as shown in table 3.
Above-mentioned grating section can be on an optical fiber, to adopt the phase mask method to write system to form.
Above-mentioned output optical pulse waveform is the bilateral exponential waveform of static all-optical.
The heterogeneous multi-wavelength optical fiber grating parameter that moves among table 3 embodiment 3
Based on heterogeneous method of work of moving the shaping of light pulse device of multi-wavelength optical fiber grating, it is characterized in that this method may further comprise the steps:
(1) with the A port input of optical frequency com 1 through circulator 2;
(2) the B port of circulator 2 connects the heterogeneous multi-wavelength optical fiber grating 3 that moves, and adjusts through heterogeneous 3 pairs of inputs of multi-wavelength optical fiber grating optical frequency com 1 that moves;
(3) the bilateral exponential waveform light pulse of needed static all-optical that produces is by the C port output of circulator 2.
Adjustment to optical frequency com 1 in the above-mentioned steps (2) comprises the selection to optical frequency com 1 wavelength, reaches the adjustment to optical frequency com 1 amplitude and phase place.
Above-mentioned selection to optical frequency com 1 wavelength is realized by the heterogeneous multi-wavelength optical fiber grating 3 that moves; Its selected wavelength is by the heterogeneous centre wavelength decision that moves every section grating section in the multi-wavelength optical fiber grating 3; Promptly by the grating cycle decision of every section grating section, the spectral line of from input optical frequency com 1, selecting is equidistant arrangement.
Above-mentioned adjustment to optical frequency com 1 amplitude is realized by the heterogeneous multi-wavelength optical fiber grating 3 that moves; The size of its amplitude adjustment is by the heterogeneous reflectivity decision that moves every section grating section in the multi-wavelength optical fiber grating 3; Promptly by the grating length decision of every section grating section, the amplitude distribution of adjustment back spectral line is consistent with the amplitude distribution of output waveform spectral line.
Above-mentioned adjustment to optical frequency com 1 phase place is realized by the heterogeneous multi-wavelength optical fiber grating 3 that moves; The size of its phase place adjustment is moved the phase shift decision of introducing between each grating section in the multi-wavelength optical fiber grating 3 by heterogeneous, and the phase place of adjusted spectral line is consistent with the PHASE DISTRIBUTION of output waveform spectral line.
The above-mentioned repetition frequency that produces based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating is the bilateral exponential pulse sequence of static all-optical of 12.5GHz (cycle 80ps), and is as shown in Figure 7.
Embodiment 4:
Structure based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating is as shown in Figure 8, wherein λ
iRepresent i (i=1,2,3 ... 41) centre wavelength of individual grating section, P
iExpression expression i (i=1,2,3 ... The phase shift of 40) inserting between section grating and the i+1 section grating section, the heterogeneous grating effective refractive index n that moves multi-wavelength optical fiber grating
Eff=1.45, mean refractive index changes delta n=0.0001, depth of modulation s=1.
As shown in Figure 8 based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating; It is characterized in that it comprises circulator 2 and the heterogeneous multi-wavelength optical fiber grating 3 that moves; Said circulator 2 has three ports, promptly be used to import optical frequency com 1 the A port, be used to connect the heterogeneous C port that moves the B port of multi-wavelength optical fiber grating 3 and be used for output waveform.
The above-mentioned heterogeneous multi-wavelength optical fiber grating 3 that moves is made up of 34 phase shifts between 35 sections grating sections and the grating section, and parameter is seen table 2.
Above-mentioned grating section is the Fiber Bragg Grating FBG with different grating cycles, and the grating periods lambda is seen table 4.
Heterogeneous parameter of moving multi-wavelength optical fiber grating 3 is as shown in table 4.
Above-mentioned grating section can be on an optical fiber, to adopt the phase mask method to write system to form.
Above-mentioned output waveform is the static all-optical cosine waveform.
The heterogeneous multi-wavelength optical fiber grating parameter that moves among table 4 embodiment 4
Based on heterogeneous method of work of moving the shaping of light pulse device of multi-wavelength optical fiber grating, it is characterized in that this method may further comprise the steps:
(1) with the A port input of optical frequency com 1 through circulator 2;
(2) the B port of circulator 2 connects the heterogeneous multi-wavelength optical fiber grating 3 that moves, and adjusts through heterogeneous 3 pairs of inputs of multi-wavelength optical fiber grating optical frequency com 1 that moves;
(3) the needed static all-optical cosine waveform light pulse that produces is by the C port output of circulator 2.
Adjustment to optical frequency com 1 in the above-mentioned steps (2) comprises the selection to optical frequency com 1 wavelength, reaches the adjustment to optical frequency com 1 amplitude and phase place.
Above-mentioned selection to optical frequency com 1 wavelength is realized by the heterogeneous multi-wavelength optical fiber grating 3 that moves; Its selected wavelength is by the heterogeneous centre wavelength decision that moves every section grating section in the multi-wavelength optical fiber grating 3; Promptly by the grating cycle decision of every section grating section, the spectral line of from input optical frequency com 1, selecting is equidistant arrangement.
Above-mentioned adjustment to optical frequency com 1 amplitude is realized by the heterogeneous multi-wavelength optical fiber grating 3 that moves; The size of its amplitude adjustment is by the heterogeneous reflectivity decision that moves every section grating section in the multi-wavelength optical fiber grating 3; Promptly by the grating length decision of every section grating section, the amplitude distribution of adjustment back spectral line is consistent with the amplitude distribution of output waveform spectral line.
Above-mentioned adjustment to optical frequency com 1 phase place is realized by the heterogeneous multi-wavelength optical fiber grating 3 that moves; The size of its phase place adjustment is moved the phase shift decision of introducing between each grating section in the multi-wavelength optical fiber grating 3 by heterogeneous, and the phase place of adjusted spectral line is consistent with the PHASE DISTRIBUTION of output waveform spectral line.
The above-mentioned repetition frequency that produces based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating 3 is the static all-optical cosine impulse sequence of 125GHz (cycle 8ps), and is as shown in Figure 9.
Learn according to above-mentioned four embodiment; It is different selecting the different optical grating reflection rates and the pulse waveform that phase shift produced of introducing; Through the filtering characteristic of every section grating, realize selection to spectral line, realize amplitude adjustment through every section grating reflection rate to selected spectral line; Realize phase place adjustment through the phase shift of introducing between each grating section, thereby obtain the light pulse output of static required waveform selected spectral line.
Claims (8)
1. based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating; It is characterized in that it comprises circulator and the heterogeneous multi-wavelength optical fiber grating that moves; Said circulator has three ports, promptly is used to import the A port of optical frequency com, the C port that is used to connect the B port of fiber grating and is used for output waveform; The said heterogeneous multi-wavelength optical fiber grating that moves is made up of grating section more than two sections or two sections and the phase shift between the grating section; Said grating section is the Fiber Bragg Grating FBG with different grating cycles.
2. according to claim 1 a kind of based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating, it is characterized in that said grating section can be on an optical fiber, to adopt the phase mask method to write system to form.
3. according to claim 1 a kind of based on the heterogeneous shaping of light pulse device that moves multi-wavelength optical fiber grating, it is characterized in that said output waveform is the light pulse of the required waveform of static state.
4. based on heterogeneous method of work of moving the shaping of light pulse device of multi-wavelength optical fiber grating, it is characterized in that this method may further comprise the steps:
(1) with the A port input of optical frequency com through circulator;
(2) the B port of circulator connects the heterogeneous multi-wavelength optical fiber grating that moves; Adjust through the heterogeneous multi-wavelength optical fiber grating pair input optical frequency com that moves, adjust to amplitude spectrum and the phase spectrum distribution of required waveform consistent with phase spectrum the amplitude spectrum of the spectral line of incoming frequency comb.
The light pulse of the required waveform of the needed static state that (3) produces is exported by circulator C port.
5. according to claim 4 based on heterogeneous method of work of moving the shaping of light pulse device of multi-wavelength optical fiber grating; It is characterized in that the adjustment to optical frequency com comprises the selection to the optical frequency com wavelength in the said step (2), reach adjustment optical frequency com amplitude and phase place.
6. according to claim 5 based on heterogeneous method of work of moving the shaping of light pulse device of multi-wavelength optical fiber grating; It is characterized in that said selection to the optical frequency com wavelength is realized by the heterogeneous multi-wavelength optical fiber grating that moves; Its selected wavelength is by the heterogeneous centre wavelength decision that moves every section grating section in the multi-wavelength optical fiber grating; Promptly by the grating cycle decision of every section grating section, the spectral line of from the input optical frequency com, selecting is equidistant arrangement.
7. according to claim 5 based on heterogeneous method of work of moving the shaping of light pulse device of multi-wavelength optical fiber grating; It is characterized in that said adjustment to the optical frequency com amplitude is realized by the heterogeneous multi-wavelength optical fiber grating that moves; The size of its amplitude adjustment is by the heterogeneous reflectivity decision that moves every section grating section in the multi-wavelength optical fiber grating; Promptly by the grating length decision of every section grating section, the amplitude distribution of adjustment back spectral line is consistent with the amplitude distribution of output waveform spectral line.
8. according to claim 5 based on heterogeneous method of work of moving the shaping of light pulse device of multi-wavelength optical fiber grating; It is characterized in that said adjustment to the optical frequency com phase place is realized by the heterogeneous multi-wavelength optical fiber grating that moves; The size of its phase place adjustment is moved the phase shift decision of introducing between each grating section in the multi-wavelength optical fiber grating by heterogeneous, and the phase place of adjusted spectral line is consistent with the PHASE DISTRIBUTION of output waveform spectral line.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734783A (en) * | 2015-04-13 | 2015-06-24 | 天津理工大学 | Arbitrary waveform light pulse generator |
| CN110007394A (en) * | 2019-05-17 | 2019-07-12 | 中南大学 | A kind of phase shift optical fiber Bragg grating and preparation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090257715A1 (en) * | 2008-04-15 | 2009-10-15 | The Governing Council Of The University Of Toronto | Dynamic waveform shaping in a continuous fiber |
| CN102116992A (en) * | 2010-12-01 | 2011-07-06 | 天津理工大学 | Device and method for generating all-optical arbitrary waveform based on optical fiber Bragg grating |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090257715A1 (en) * | 2008-04-15 | 2009-10-15 | The Governing Council Of The University Of Toronto | Dynamic waveform shaping in a continuous fiber |
| CN102116992A (en) * | 2010-12-01 | 2011-07-06 | 天津理工大学 | Device and method for generating all-optical arbitrary waveform based on optical fiber Bragg grating |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734783A (en) * | 2015-04-13 | 2015-06-24 | 天津理工大学 | Arbitrary waveform light pulse generator |
| CN104734783B (en) * | 2015-04-13 | 2017-08-15 | 天津理工大学 | A kind of random waveform optical pulse generator |
| CN110007394A (en) * | 2019-05-17 | 2019-07-12 | 中南大学 | A kind of phase shift optical fiber Bragg grating and preparation method |
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Application publication date: 20120926 |