WO2004021525A2 - Halbleiterlaservorrichtung mit externem resonator und konkavem spiegel - Google Patents
Halbleiterlaservorrichtung mit externem resonator und konkavem spiegel Download PDFInfo
- Publication number
- WO2004021525A2 WO2004021525A2 PCT/EP2003/008526 EP0308526W WO2004021525A2 WO 2004021525 A2 WO2004021525 A2 WO 2004021525A2 EP 0308526 W EP0308526 W EP 0308526W WO 2004021525 A2 WO2004021525 A2 WO 2004021525A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- semiconductor laser
- laser device
- reflection means
- laser element
- individual
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
- H01S5/4031—Edge-emitting structures
- H01S5/4062—Edge-emitting structures with an external cavity or using internal filters, e.g. Talbot filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/14—External cavity lasers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/065—Mode locking; Mode suppression; Mode selection ; Self pulsating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/026—Monolithically integrated components, e.g. waveguides, monitoring photo-detectors, drivers
- H01S5/0267—Integrated focusing lens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/065—Mode locking; Mode suppression; Mode selection ; Self pulsating
- H01S5/0656—Seeding, i.e. an additional light input is provided for controlling the laser modes, for example by back-reflecting light from an external optical component
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4012—Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
- H01S5/4031—Edge-emitting structures
Definitions
- the present invention relates to a semiconductor laser device comprising a semiconductor laser element or a plurality of individual lasers mounted in parallel with a plurality of exit surfaces from which laser light can emerge, which has a greater divergence in a first direction than in a second direction perpendicular thereto, and at least one spaced apart to the exit surfaces outside the semiconductor laser element or the individual laser, reflection means arranged with at least one reflective surface which can reflect back at least parts of the light emerging from the semiconductor laser element or the individual lasers through the exit surfaces into the semiconductor laser element or the individual lasers such that the mode spectrum of the semiconductor laser element or the individual laser is affected.
- a semiconductor laser device of the aforementioned type is known from I. Nelson, B. Chann, TG Walker, Opt. Lett. 25, 1352 (2000).
- an external resonator is used, which uses a grating as the reflection means.
- a fast-axis collimation lens is located in the external resonator directly after the semiconductor laser element.
- Two lenses serving as a telescope are arranged between the fast-axis collimation lens and the grating.
- the semiconductor laser device known from the prior art can only influence the longitudinal modes of the semiconductor laser element or the individual emitters of the semiconductor laser element. Due to the structure known from the prior art, the transverse mode spectrum of the semiconductor laser device cannot be influence. For this reason, this semiconductor laser device known from the prior art will have a multitude of different transverse modes per emitter, all of which contribute to the laser light emitted by the semiconductor laser device. Due to this fact, the laser light emerging from the semiconductor laser device according to this prior art is difficult to focus.
- the problem underlying the present invention is to create a semiconductor laser device of the type mentioned at the outset, which has a high output power with improved beam quality.
- the at least one reflecting surface of the reflection means is concavely curved.
- the additional lenses inside the external resonator can be dispensed with because the concavely curved reflecting surface can simultaneously serve as an imaging element.
- the concave curvature of the reflecting surface makes it possible, in particular, to dispense with the comparatively complex structuring of the semiconductor laser element.
- the at least one reflecting surface can reflect the corresponding partial beams of the laser light back onto the respective exit surfaces in such a way that they serve as an aperture. This measure can be used to influence the mode spectrum of the semiconductor laser element with the simplest of means.
- the semiconductor laser device can comprise a lens means arranged between the reflection means and the semiconductor laser element or the individual emitters, which can at least partially reduce the divergence of the laser light at least in the first direction.
- This lens means thus serves as a fast-axis collimation lens.
- the reflection means has a reflecting surface on which partial beams originating from different exit surfaces can be reflected.
- the reflection means can have a multiplicity of reflecting surfaces, which can each reflect partial beams emerging from the individual exit surfaces.
- the semiconductor laser device comprises one Beam transformation unit, which is designed in particular as a beam rotating unit and can preferably rotate individual beams, in particular by approximately 90 °. With such a beam transformation unit, this can be done from the
- Semiconductor laser device emerging laser light are transformed such that it is then easier to focus.
- the beam transformation unit is arranged between the reflection means and the semiconductor laser element or the individual lasers, in particular between the reflection means and the lens means.
- Such an arrangement of the beam transformation unit within the external resonator allows more space for the coupling to be created.
- the semiconductor laser device can further comprise a frequency-doubling element which is arranged between the reflection means and the semiconductor laser element or the individual lasers, in particular between the reflection means and the lens means.
- the second harmonic could be at least partially derived from the
- the semiconductor laser element is supplied with voltage or supplied with current for generating electron-hole pairs only in partial regions which correspond to the spatial extent of a desired mode of the laser light.
- This comparatively simple measure can further optimize the preference for desired modes of the laser light.
- Fig. 1 is a schematic plan view of a first
- FIG. 2 shows a schematic plan view of a second embodiment of a semiconductor laser device according to the invention
- FIG. 3 shows a schematic plan view of a third embodiment of a semiconductor laser device according to the invention.
- FIG. 4 shows a schematic top view of a fourth embodiment of a semiconductor laser device according to the invention.
- the exemplary embodiment of a semiconductor laser device according to the invention shown in FIG. 1 comprises a semiconductor laser element 1 with a plurality of exit surfaces 2, 3, 4, 5, from which laser light can emerge.
- the semiconductor laser element 1 is designed as a broad stripe emitter array or as a so-called laser diode bar.
- only four exit surfaces 2, 3, 4, 5 that serve to separate the light emissions are shown.
- the laser light emerging from each of the exit surfaces 2, 3, 4, 5 is divided into two partial beams 2a, 2b; 3a, 3b; 4a, 4b; 5a, 5b split, each enclosing an oppositely equal angle with the normal on the exit surfaces 2, 3, 4, 5.
- the two partial beams 2a, 2b; 3a, 3b; 4a, 4b; 5a, 5b each represent a picked-out laser mode of the emitting partial area of the semiconductor laser element 1 belonging to the corresponding exit surface 2, 3, 4, 5.
- a semiconductor laser device further comprises, outside the semiconductor laser element 1, a lens means 6 which is designed as a fast-axis collimation lens.
- the fast axis corresponds to the Y direction in the Cartesian coordinate system shown.
- the fast axis in such broad-band emitters is the direction perpendicular to the direction in which the individual emitters are arranged next to one another.
- the divergence of such a semiconductor laser element 1 in the fast axis is substantially greater than in the slow axis perpendicular thereto, which corresponds to the X direction in FIG. 1.
- a reflecting means 7 with a reflecting surface 8 facing the semiconductor laser element 1 is arranged behind the lens means 6 at a suitable distance from the semiconductor laser element 1.
- the partial beams 2a, 3a, 4a, 5a are reflected back from the reflecting surface 8 in the direction of the exit surfaces 2, 3, 4, 5.
- the exit surfaces 2, 3, 4, 5 are optionally provided with an anti-reflective coating, so that the partial beams 2a, 3a, 4a, 5a reflected back can at least partially penetrate into the semiconductor laser element 1 such that the mode spectrum of the semiconductor laser element 1 thereby being affected .
- focal length and distance of the reflection means 7 with respect to the exit surfaces 2, 3, 4, 5, the propagation of certain modes in the semiconductor laser element 1 can be preferred.
- not all laser emitters which are assigned to the individual exit surfaces 2, 3, 4, 5 generally oscillate in the same mode because the angles at which the partial beams 2a, 3a, 4a, 5a from the exit surfaces
- the beam waist on the exit surfaces 2, 3, 4, 5 can correspond approximately to their respective width.
- the coupling out of the semiconductor laser device according to FIG. 1 can take place via the partial beams 2b, 3b, 4b, 5b.
- a further partially reflecting reflection means could be inserted below the reflection means 7 in FIG. 1, which serves as a decoupler.
- a beam transformation unit could also be introduced into the beam path of the partial beams 2b, 3b, 4b, 5b, which facilitates the further processing of the coupled partial beams.
- Fig. 2 shown embodiment of a semiconductor laser device according to the invention, the same parts are provided with the same reference numerals.
- partial beams 2c, 3c, 4c, 5c are drawn, which correspond to a transverse mode of the individual emitters of the semiconductor laser element 1, which in the substantially parallel to the normal on the exit surfaces 2, 3, 4, 5, d. H. approximately in the Z direction according to the Cartesian coordinate system from which semiconductor laser element 1 emerges.
- the reflection means 9 provided in FIG. 2 not only has a reflecting surface, but a plurality of reflecting surfaces 10, 11, 12, 13.
- each of the partial beams 2c, 3c, 4c, 5c is assigned one of the reflecting surfaces 10, 11, 12, 13, so that in this embodiment each of the emitters of the semiconductor laser element 1 corresponding to the exit surfaces 2, 3, 4, 5 is in the same transversal or longitudinal mode can be operated.
- a wave-selective element 14 is drawn in dashed lines in FIG. 2, which can be embodied, for example, as an etalon.
- the optional wave-selective element 14 makes it possible to select certain longitudinal modes, in particular a longitudinal mode, so that the emitted laser light has a small spectral width.
- the coupling out of the semiconductor laser device can either be achieved in that the reflection means 9 is partially reflective, so that laser light can emerge from the reflection means 9 in the positive Z direction.
- the side of the semiconductor laser element which faces away from the external resonator formed by the reflection means 9 can be partially anti-reflective or not highly reflective, so that laser light can emerge in the negative Z direction on the left side in FIG. 2 of the semiconductor laser element ,
- Reflection means 9 is arranged the same reflection means, which can reflect the laser light emerging from the semiconductor laser element 1 in the negative Z direction back into the semiconductor laser element 1.
- the external resonator is formed by the two reflection means 9, the reflecting surfaces of which face one another.
- One of the reflection means 9 can be partially reflective, so that the laser light can partially pass through this reflection means for decoupling.
- a beam transformation unit 15 is also shown in dashed lines on the right side of the reflection means, which can transform the beam from the reflection means 9 when light emerges in the positive Z direction.
- the beam transformation unit can be a beam rotating unit, for example, which can rotate each of the partial beams 2c, 3c, 4c, 5c individually by, for example, 90 °.
- Such a beam transformation improves the focusability of the emerging laser light. According to the invention, there is definitely the possibility of using such a beam transformation unit also in the embodiment according to FIG. 1.
- the semiconductor laser device according to FIG. 3 differs from that in FIG. 2 essentially in that modes are preferred which, according to FIG. 1, emerge from the exit surfaces 2, 3, 4, 5 at an angle to the normal.
- the reflection means 16 provided in the semiconductor laser device according to FIG. 3 in turn has a multiplicity of reflecting surfaces 17, 18, 19, 20.
- the reflection means 16 drawn in a solid line it is oriented essentially parallel to the X direction, so that the paths of the individual partial beams 2a, 3a, 4a, 5a between the exit surfaces 2, 3, 4, 5 and the reflecting surfaces 17, 18, 19, 20 are the same.
- a reflection means 16 'can also be provided, which is shown in dash-dot lines in FIG.
- the reflection means 16' which is essentially perpendicular to the direction of propagation of the partial beams 2a, 3a, 4a, 5a is aligned, the optical paths of the partial beams 2a, 3a, 4a, 5a are different between the exit surfaces 2, 3, 4, 5 and the reflection means 16 '.
- the individual reflecting surfaces 17, 18, 19, 20 are inclined with respect to the Z axis. This does not apply to the reflection means 16 '. However, it may be necessary to design the radii of curvature of the reflecting surfaces differently.
- FIG. 3 also shows a beam transformation unit 15, which is arranged in the beams 2b, 3b, 4b, 5b to be coupled out.
- the laser light passing through this beam transformation unit 15 can be focused, for example, by further focusing means on the end of an optical fiber.
- a beam transformation unit in the external resonator ie between the respective reflection means 7, 9, 16, 16 'and the Semiconductor laser element 1, in particular to be arranged between the lens means 6 and the reflection means 7, 9, 16, 16 '.
- Such an arrangement may have the advantage that it creates more space for the coupling.
- a beam transformation unit for example designed as a beam rotating unit, rotates the emission of the individual emitters by 90 °. After such a rotation, the partial beams 2a, 3a, 4a, 5a run upwards at the same angles to the X-Z plane and the partial beams 2b, 3b, 4b, 5b downwards at the same angles.
- a single cylinder mirror is then suitable for slow-axis collimation. If spherical mirrors are to be used, a mirror array is also required for slow-axis collimation.
- a stack of emitter arrays is used, a one-dimensional array of cylindrical mirrors could be used for the slow-axis collimation in a setup with a beam rotating unit.
- a frequency-doubling element for example a frequency-doubling crystal
- this element could be accommodated between the lens means 6 and the reflection means 9 in FIG. 2.
- the reflecting surfaces 10, 1 1, 12, 1 3 can be highly reflective for the fundamental wavelength and transmissive for the wavelength of the second harmonic.
- the lens means 6 could be designed in such a way that the fundamental wavelength is passed through unhindered and the second harmonic is reflected, so that the second harmonic is not fed back into the semiconductor laser element 1.
- a two-dimensional array of spherical or cylindrical mirrors or a one-dimensional array of cylindrical mirrors can be used.
- the distance and the focal length can be determined in accordance with the statements relating to FIG. 1.
- FIG. 4 shows a semiconductor laser element 21 which is designed as a laser diode bar.
- the semiconductor laser element 21 has a multiplicity of exit surfaces 22, 23, 24 from which laser light 25, 26, 27 can emerge.
- a reflection means 28 is provided which has a multiplicity of reflecting surfaces 29, 30, 31 arranged next to one another, which is designed, for example, like the reflecting surface 10, 11, 12, 13 according to FIG are .
- the reflecting surfaces 29, 30, 31 also reflect the corresponding portion of the laser light 25, 26, 27 through the associated exit surfaces 22, 23, 24 into the semiconductor laser element 21.
- exit surfaces such as the middle exit surface 23 in FIG. 4
- individual exit surfaces are provided with a highly reflective coating 33, so that no light can emerge from the semiconductor laser element from this exit surface 23. In this case, the light is reflected at this exit surface and, after further reflection at the opposite end surface 32, exits the semiconductor laser element 21 through one of the adjacent exit surfaces 22, 24.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50306271T DE50306271D1 (de) | 2002-09-02 | 2003-08-01 | Halbleiterlaservorrichtung |
AU2003251680A AU2003251680A1 (en) | 2002-09-02 | 2003-08-01 | Semiconductor laser device |
EP03790845A EP1540786B1 (de) | 2002-09-02 | 2003-08-01 | Halbleiterlaservorrichtung |
US10/526,217 US20060165144A1 (en) | 2002-09-02 | 2003-08-01 | Semiconductor laser device |
JP2004531848A JP2005537643A (ja) | 2002-09-02 | 2003-08-01 | 半導体レーザ装置 |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002140949 DE10240949A1 (de) | 2002-09-02 | 2002-09-02 | Halbleiterlaservorrichtung |
DE10240949.8 | 2002-09-02 | ||
DE10250048.7 | 2002-10-25 | ||
DE10250046.0 | 2002-10-25 | ||
DE10250048 | 2002-10-25 | ||
DE10250046 | 2002-10-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004021525A2 true WO2004021525A2 (de) | 2004-03-11 |
WO2004021525A3 WO2004021525A3 (de) | 2004-04-22 |
Family
ID=31981884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/008526 WO2004021525A2 (de) | 2002-09-02 | 2003-08-01 | Halbleiterlaservorrichtung mit externem resonator und konkavem spiegel |
Country Status (7)
Country | Link |
---|---|
US (1) | US20060165144A1 (de) |
EP (1) | EP1540786B1 (de) |
JP (1) | JP2005537643A (de) |
KR (1) | KR101033759B1 (de) |
AU (1) | AU2003251680A1 (de) |
DE (1) | DE50306271D1 (de) |
WO (1) | WO2004021525A2 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4441918B2 (ja) * | 2006-08-31 | 2010-03-31 | セイコーエプソン株式会社 | 光源装置及び画像表示装置 |
JP4341685B2 (ja) | 2007-02-22 | 2009-10-07 | セイコーエプソン株式会社 | 光源装置及びプロジェクタ |
JP4888261B2 (ja) * | 2007-07-12 | 2012-02-29 | セイコーエプソン株式会社 | 光源装置、画像表示装置及びモニタ装置 |
JP4591489B2 (ja) * | 2007-08-30 | 2010-12-01 | セイコーエプソン株式会社 | 光源装置、画像表示装置及びモニタ装置 |
EP2636111B8 (de) * | 2010-11-03 | 2020-08-19 | TRUMPF Photonic Components GmbH | Optisches element für vertikalresonator-oberflächenemissionslaser |
US8891579B1 (en) | 2011-12-16 | 2014-11-18 | Nlight Photonics Corporation | Laser diode apparatus utilizing reflecting slow axis collimators |
WO2015134931A1 (en) | 2014-03-06 | 2015-09-11 | Nlight Photonics Corporation | High brightness multijunction diode stacking |
US9705289B2 (en) | 2014-03-06 | 2017-07-11 | Nlight, Inc. | High brightness multijunction diode stacking |
US9525269B2 (en) * | 2014-11-22 | 2016-12-20 | TeraDiode, Inc. | Wavelength beam combining laser systems utilizing etalons |
US10761276B2 (en) | 2015-05-15 | 2020-09-01 | Nlight, Inc. | Passively aligned crossed-cylinder objective assembly |
EP3417340A1 (de) | 2016-02-16 | 2018-12-26 | NLIGHT, Inc. | Passiv ausgerichtetes einzelelementteleskop für verbesserte pakethelligkeit |
CN109075524B (zh) | 2016-03-18 | 2021-09-03 | 恩耐公司 | 用以提高亮度的光谱复用二极管泵浦模块 |
EP3560048B1 (de) | 2016-12-23 | 2023-08-09 | NLIGHT, Inc. | Günstiges gehäuse für einen optischen pumplaser |
WO2018200587A1 (en) | 2017-04-24 | 2018-11-01 | Nlight, Inc. | Low swap two-phase cooled diode laser package |
DE102017207402A1 (de) * | 2017-05-03 | 2018-11-08 | Robert Bosch Gmbh | Optischer Rußpartikelsensor für Kraftfahrzeuge |
WO2019157092A1 (en) | 2018-02-06 | 2019-08-15 | Nlight, Inc. | Diode laser apparatus with fac lens out-of-plane beam steering |
JP7411957B2 (ja) * | 2020-01-28 | 2024-01-12 | パナソニックIpマネジメント株式会社 | 波長ビーム結合システム |
Citations (6)
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US4656641A (en) * | 1985-02-04 | 1987-04-07 | Xerox Corporation | Laser cavity optical system for stabilizing the beam from a phase locked multi-emitter broad emitter laser |
US4797894A (en) * | 1987-08-21 | 1989-01-10 | Xerox Corporation | Alignment method and arrangement for external optical feedback for semiconductor diode lasers |
EP0712183A2 (de) * | 1994-11-14 | 1996-05-15 | Mitsui Petrochemical Industries, Ltd. | Wellenlängenstabilisierter Lichtquelle |
US5773345A (en) * | 1991-04-26 | 1998-06-30 | Fuji Xerox Co., Ltd. | Optical link amplifier and a wavelength multiplex laser oscillator |
EP0961152A1 (de) * | 1998-05-25 | 1999-12-01 | Fisba Optik Ag | Verfahren und Vorrichtung zur Formung eines kollimierten Lichtstrahls aus den Emissionen mehrerer Lichtquellen |
US6404797B1 (en) * | 1997-03-21 | 2002-06-11 | Novalux, Inc. | Efficiency high power laser device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US4887270A (en) * | 1986-04-30 | 1989-12-12 | Eye Research Institute Of Retina Foundation | Continuous wave, frequency doubled solid state laser systems with stabilized output |
JPH08213686A (ja) * | 1994-11-14 | 1996-08-20 | Mitsui Petrochem Ind Ltd | 波長安定化光源 |
US6240116B1 (en) * | 1997-08-14 | 2001-05-29 | Sdl, Inc. | Laser diode array assemblies with optimized brightness conservation |
US6301274B1 (en) * | 1998-03-30 | 2001-10-09 | Coretek, Inc. | Tunable external cavity laser |
-
2003
- 2003-08-01 WO PCT/EP2003/008526 patent/WO2004021525A2/de active IP Right Grant
- 2003-08-01 EP EP03790845A patent/EP1540786B1/de not_active Expired - Lifetime
- 2003-08-01 DE DE50306271T patent/DE50306271D1/de not_active Expired - Lifetime
- 2003-08-01 KR KR1020057003650A patent/KR101033759B1/ko not_active IP Right Cessation
- 2003-08-01 US US10/526,217 patent/US20060165144A1/en not_active Abandoned
- 2003-08-01 AU AU2003251680A patent/AU2003251680A1/en not_active Abandoned
- 2003-08-01 JP JP2004531848A patent/JP2005537643A/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4656641A (en) * | 1985-02-04 | 1987-04-07 | Xerox Corporation | Laser cavity optical system for stabilizing the beam from a phase locked multi-emitter broad emitter laser |
US4797894A (en) * | 1987-08-21 | 1989-01-10 | Xerox Corporation | Alignment method and arrangement for external optical feedback for semiconductor diode lasers |
US5773345A (en) * | 1991-04-26 | 1998-06-30 | Fuji Xerox Co., Ltd. | Optical link amplifier and a wavelength multiplex laser oscillator |
EP0712183A2 (de) * | 1994-11-14 | 1996-05-15 | Mitsui Petrochemical Industries, Ltd. | Wellenlängenstabilisierter Lichtquelle |
US6404797B1 (en) * | 1997-03-21 | 2002-06-11 | Novalux, Inc. | Efficiency high power laser device |
EP0961152A1 (de) * | 1998-05-25 | 1999-12-01 | Fisba Optik Ag | Verfahren und Vorrichtung zur Formung eines kollimierten Lichtstrahls aus den Emissionen mehrerer Lichtquellen |
Also Published As
Publication number | Publication date |
---|---|
EP1540786A2 (de) | 2005-06-15 |
JP2005537643A (ja) | 2005-12-08 |
KR101033759B1 (ko) | 2011-05-09 |
WO2004021525A3 (de) | 2004-04-22 |
US20060165144A1 (en) | 2006-07-27 |
EP1540786B1 (de) | 2007-01-10 |
KR20050057117A (ko) | 2005-06-16 |
DE50306271D1 (de) | 2007-02-22 |
AU2003251680A8 (en) | 2004-03-19 |
AU2003251680A1 (en) | 2004-03-19 |
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