WO2006106886A1 - 半導体レーザ素子 - Google Patents
半導体レーザ素子 Download PDFInfo
- Publication number
- WO2006106886A1 WO2006106886A1 PCT/JP2006/306759 JP2006306759W WO2006106886A1 WO 2006106886 A1 WO2006106886 A1 WO 2006106886A1 JP 2006306759 W JP2006306759 W JP 2006306759W WO 2006106886 A1 WO2006106886 A1 WO 2006106886A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- semiconductor laser
- laser device
- current injection
- layer
- dld
- Prior art date
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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
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/22—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure
- H01S5/223—Buried stripe structure
-
- 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
- H01S5/0014—Measuring characteristics or properties thereof
- H01S5/0021—Degradation or life time measurements
-
- 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
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/22—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure
- H01S5/2205—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure comprising special burying or current confinement layers
- H01S5/2206—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure comprising special burying or current confinement layers based on III-V materials
-
- 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
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/22—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure
- H01S5/223—Buried stripe structure
- H01S5/2237—Buried stripe structure with a non-planar active layer
Definitions
- the present invention relates to a gain waveguide type high-power semiconductor laser device excellent in durability.
- broad-area semiconductor laser elements having a wide current injection stripe width have been used as excitation light sources such as solid lasers, fiber lasers, and double-core erbium-doped optical amplifiers, and as direct processing light sources of metal or resin. Widely used. In this way, as the application field expands, broad area semiconductor laser elements are required to have not only high output but also high reliability (Japanese Patent Laid-Open No. 2001-308445).
- One of the broad area semiconductor laser elements is a gain-guided semiconductor laser element.
- FIG. 4 is a cross-sectional view showing a configuration of a conventional gain-guided semiconductor laser device 1.
- the semiconductor laser element 1 includes a first cladding layer 3, a first optical waveguide layer 4, an active layer 5, a second optical waveguide layer 6, and a second optical element on one surface 2a of the thickness direction Z of the planar semiconductor substrate 2.
- a cladding layer 7, a current confinement layer 8, and a contact layer 9 are formed.
- a current injection region (current injection stripe) 11 is formed in the center of the transverse direction Y perpendicular to the oscillation direction X and the thickness direction Z.
- ⁇ 100> DLD Dark Line Defect
- 100> DLD grows based on defects introduced by scribe or the like at the time of manufacturing a semiconductor laser device.
- the conventional gain-guided semiconductor laser device 1 as shown in FIG. 4 does not have a light confinement structure in the lateral direction. For this reason, spontaneous emission light generated in the current injection region 11 propagates through the first and second optical waveguide layers 4 and 6 that are part of the laser structure, and the element end 12 in the lateral direction Y of the semiconductor laser element 1 It reaches the vicinity and is absorbed by the active layer 5. The carriers generated thereby are recombined at the defect portion of the element end 12 introduced by scribe or the like. Due to the recombination energy at this time, crystal defects grow and the transition is oriented toward 100>. The progress will be 100> DLD.
- FIGS. 5A and 5B are observations of ⁇ 100> DLD grown in the conventional semiconductor laser device 1 shown in FIG. 4 based on the defects introduced by scribing.
- FIG. 5A is a photograph of the appearance of the semiconductor laser device 1
- FIG. 5B is a photograph of the electroluminescence of the semiconductor laser device 1 of FIG. 5A taken with a high sensitivity CCD (Charge Coupled Device).
- CCD Charge Coupled Device
- An object of the present invention is to realize a gain-guided semiconductor laser device having high reliability and high output by suppressing the growth of ⁇ 100> DLD.
- the present invention comprises a semiconductor substrate in which two grooves extending in the oscillation direction are formed, and a gain waveguide type semiconductor laser structure portion formed on the semiconductor substrate and having a current injection region, wherein the current injection region is
- This is a semiconductor laser device provided at a position sandwiched between the two grooves.
- the active layer of the semiconductor laser device is preferably composed of a GaAs quantum well.
- FIG. 1 is a cross-sectional view showing a configuration of a semiconductor laser device according to an embodiment of the present invention.
- FIG. 2 is a graph showing a result of a continuous energization test of the semiconductor laser device of the example.
- Fig. 3 is a graph showing the results of a continuous energization test of a conventional semiconductor laser device as a comparative example.
- FIG. 4 is a cross-sectional view showing a configuration of a conventional gain-guided semiconductor laser device as a comparative example.
- FIG. 5 is an observation view of the semiconductor laser element in which ⁇ 100> DLD occurs.
- FIG. 1 is a cross-sectional view showing a configuration of a semiconductor laser device 20 according to an embodiment of the present invention.
- the semiconductor laser element 20 is formed on the n-type GaAs semiconductor substrate 21 on which two grooves (lower opening width Wl ⁇ O / zm, depth D: lm) 31 formed by chemical etching are formed, that is, grooves.
- An n-type AlGaAs cladding layer 22 is formed on the entire surface of one surface 21a of the thickness direction Z including the surface facing 31 by using metal-organic vapor phase epitaxy, photolithography, and chemical etching, all of which are well-known techniques. (Thickness: 0.9 / zm) and n-type Al Ga As light
- Waveguide layer 23 (thickness: 0.4 m) and n-type Al Ga As carrier blocking layer (thickness: 0.013 m)
- active active layer 24 and p-type Al Ga As optical waveguide layer 25 (thickness: 0.4 ⁇ ⁇ )
- ⁇ -type Al Ga As cladding layer 26 (thickness: 0.9 / z m) and n-type GaAs current confinement layer 27 (thickness: 0.9 / z m)
- a current injection region (current injection stripe) 29 (stripe width W2: 100 ⁇ m) is formed at the center of the ridge!
- the current injection stripe 29 is formed at a position between the two grooves 31 formed in the semiconductor substrate 21 (distance W3: 60 ⁇ m from the stripe end to the groove end on the stripe side).
- the waveguide layers are bent on both lateral sides perpendicular to the oscillation direction of the current injection stripe 29. It has a structure.
- the force applied to the completely separated confinement structure (Decoupled Confinement Heterostructure: abbreviated as DCH)
- DCH Decoupled Confinement Heterostructure
- SCH separation confinement structure
- the carrier block layer is necessary.
- the carrier block layer is not essential for this embodiment.
- the depth D of the groove 31 is selected to be equal to or larger than the width of the waveguide mode in the current injection stripe 29.
- the thickness of the waveguide layers 23 and 25 and the active layer 24 is set to It is preferable to select more than the added thickness.
- each layer can be determined as appropriate in order to obtain a desired laser oscillation.
- the semiconductor laser device 20 of this example was subjected to a continuous energization test by injecting a current at a temperature of 50 ° C. so that the output was constant at 2 watts (W).
- the continuous energization test was conducted after 400 hours of screening under the same conditions as the continuous energization test.
- FIG. 2 shows the result of a continuous energization test of the semiconductor laser device 20 of this example.
- the horizontal axis indicates the elapsed time from the start of energization, and the unit is time (hr).
- the vertical axis shows the value (PZPo) obtained by dividing the output value P after operating for a predetermined time by the initial output value Po.
- PZPo the value obtained by dividing the output value P after operating for a predetermined time by the initial output value Po.
- a gain waveguide type semiconductor laser device shown in FIG. 4 was fabricated.
- the configuration of the semiconductor laser device manufactured as a comparative example is the same as that of the example in each semiconductor layer of the laser structure and the manufacturing method thereof, except that the n-type GaAs semiconductor substrate 2 is not grooved.
- a semiconductor laser device manufactured as a comparative example was subjected to a continuous energization test by injecting current so that the output was constant at 2 watts (W) under the condition of a temperature of 50 ° C. as in the example.
- This continuous energization test was conducted after 400 hours of screening under the same conditions as the continuous energization test, as in the case of the examples.
- FIG. 3 is a graph showing the results of a continuous energization test of the gain-guided semiconductor laser device of the comparative example in terms of probability distribution.
- the horizontal axis shows the time from when the energization was started until failure occurred.
- the vertical axis and the vertical axis indicate the probability that the semiconductor laser element will fail. Unit of horizontal axis is time
- the reason why the semiconductor laser device of the comparative example, that is, the semiconductor laser device 1 of the prior art cannot withstand continuous driving, that is, the reliability is low, is the occurrence of 100> DLD as described above.
- the reason why 100> DLD occurs is that there is no light confinement structure in the lateral direction Y. Since the semiconductor laser device of the comparative example does not have a light confinement structure in the lateral direction Y, the emitted spontaneous emission light is the same as the first and second optical waveguide layers 4 and 4 as shown in FIG. It is absorbed by the active layer 5 while propagating through 6.
- the spontaneous emission light propagates to the vicinity of the element end 12 and is absorbed by the active layer 5 to recombine at the defect portion formed by scribe, etc., and the recombination energy at this time causes a defect. Will grow, and 100> DLD will occur.
- the gain waveguide type semiconductor laser device 20 in which each semiconductor layer is crystal-grown on the semiconductor substrate 21 in which the groove 31 is formed is formed on both sides of the current injection stripe 29.
- the bent portion of the waveguide layer can prevent spontaneous emission light generated in the current injection stripe 29 region from propagating to the device end.
- ⁇ 100> DLD which was a problem in the past, can be suppressed, and continuous stable operation for a long time becomes possible. That is, the present invention can realize a high-power semiconductor laser device having high reliability.
- the semiconductor laser device 20 of the present invention can be manufactured by a crystal growth process similar to that of the conventional semiconductor laser device 1 by adding only the step of processing the groove 31 in the semiconductor substrate 21. It is. Therefore, it can be easily realized without an increase in manufacturing cost due to a film forming process without adding a process.
- the growth rate of ⁇ 100> DLD has been experimentally divided to differ depending on the material forming the quantum well.
- the growth rate of ⁇ 100> DLD is about an order of magnitude higher for GaAs quantum wells than for InGa As quantum wells. Therefore, the effect of the present invention is that the quantum well is made of GaAs. In the gain waveguide type semiconductor laser device having the active layer, it is more remarkable.
- It can be used as a laser light source of a high-power laser device for laser carriage.
- a gain waveguide type semiconductor laser in which each semiconductor layer is crystal-grown on a semiconductor substrate on which two grooves extending in the oscillation direction are formed so that the current injection region is located between the two grooves.
- the device can suppress ⁇ 100> DLD, which was a problem in the past, and can realize a high-power semiconductor laser device with high reliability.
- the semiconductor laser element of the present invention can be manufactured by changing only the processing of the semiconductor substrate. Therefore, it can be easily realized without any additional process and cost increase.
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- Physics & Mathematics (AREA)
- Geometry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007512902A JP5367263B2 (ja) | 2005-03-30 | 2006-03-30 | 半導体レーザ素子 |
US11/887,412 US7778298B2 (en) | 2005-03-30 | 2006-03-30 | Semiconductor laser device |
CN2006800101881A CN101151776B (zh) | 2005-03-30 | 2006-03-30 | 半导体激光器件 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2005100209 | 2005-03-30 | ||
JP2005-100209 | 2005-03-30 |
Publications (1)
Publication Number | Publication Date |
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WO2006106886A1 true WO2006106886A1 (ja) | 2006-10-12 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2006/306759 WO2006106886A1 (ja) | 2005-03-30 | 2006-03-30 | 半導体レーザ素子 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7778298B2 (ja) |
JP (1) | JP5367263B2 (ja) |
CN (1) | CN101151776B (ja) |
WO (1) | WO2006106886A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017228772A (ja) * | 2016-06-20 | 2017-12-28 | オスラム オプト セミコンダクターズ ゲゼルシャフト ミット ベシュレンクテル ハフツングOsram Opto Semiconductors GmbH | 端面発光型半導体レーザおよび端面発光型半導体レーザの動作方法 |
WO2024171681A1 (ja) * | 2023-02-15 | 2024-08-22 | 株式会社フジクラ | 半導体レーザチップ |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5281842B2 (ja) * | 2008-07-29 | 2013-09-04 | パナソニック株式会社 | 半導体レーザ装置 |
JP2011124521A (ja) * | 2009-12-14 | 2011-06-23 | Sony Corp | 半導体レーザおよびその製造方法 |
CN110402524B (zh) | 2017-03-16 | 2021-04-16 | 新唐科技日本株式会社 | 半导体激光装置、半导体激光模块以及焊接用激光源系统 |
Citations (5)
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JPS6265491A (ja) * | 1985-09-18 | 1987-03-24 | Sharp Corp | 半導体レ−ザ素子 |
JPH05502331A (ja) * | 1989-12-21 | 1993-04-22 | ベル コミュニケーションズ リサーチ インコーポレーテッド | 幾何学的ドーピング法および同法により製造の電子デバイス |
JPH06283801A (ja) * | 1993-03-25 | 1994-10-07 | Nippon Telegr & Teleph Corp <Ntt> | 半導体レーザ |
JPH07245315A (ja) * | 1994-03-04 | 1995-09-19 | Fujitsu Ltd | 半導体装置の製造方法 |
JP2000022268A (ja) * | 1998-07-01 | 2000-01-21 | Shimadzu Corp | 半導体レーザ装置 |
Family Cites Families (8)
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JPS6184087A (ja) * | 1984-10-02 | 1986-04-28 | Agency Of Ind Science & Technol | 多重量子井戸半導体レ−ザ及びその製造方法 |
JPS631092A (ja) * | 1986-06-20 | 1988-01-06 | Matsushita Electric Ind Co Ltd | 半導体レ−ザ装置 |
JPS6373691A (ja) * | 1986-09-17 | 1988-04-04 | Matsushita Electric Ind Co Ltd | 半導体レ−ザ装置 |
JPS63164484A (ja) * | 1986-12-26 | 1988-07-07 | Sharp Corp | 半導体レ−ザ素子 |
JPH01109786A (ja) * | 1987-10-22 | 1989-04-26 | Sharp Corp | 半導体レーザ素子 |
US5327448A (en) * | 1992-03-30 | 1994-07-05 | The Board Of Trustees Of The University Of Illinois | Semiconductor devices and techniques for controlled optical confinement |
JP2001308445A (ja) | 2000-04-19 | 2001-11-02 | Shimadzu Corp | 半導体レーザ素子 |
JP4816993B2 (ja) * | 2001-02-08 | 2011-11-16 | ソニー株式会社 | 半導体レーザの製造方法 |
-
2006
- 2006-03-30 WO PCT/JP2006/306759 patent/WO2006106886A1/ja active Application Filing
- 2006-03-30 CN CN2006800101881A patent/CN101151776B/zh active Active
- 2006-03-30 JP JP2007512902A patent/JP5367263B2/ja active Active
- 2006-03-30 US US11/887,412 patent/US7778298B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6265491A (ja) * | 1985-09-18 | 1987-03-24 | Sharp Corp | 半導体レ−ザ素子 |
JPH05502331A (ja) * | 1989-12-21 | 1993-04-22 | ベル コミュニケーションズ リサーチ インコーポレーテッド | 幾何学的ドーピング法および同法により製造の電子デバイス |
JPH06283801A (ja) * | 1993-03-25 | 1994-10-07 | Nippon Telegr & Teleph Corp <Ntt> | 半導体レーザ |
JPH07245315A (ja) * | 1994-03-04 | 1995-09-19 | Fujitsu Ltd | 半導体装置の製造方法 |
JP2000022268A (ja) * | 1998-07-01 | 2000-01-21 | Shimadzu Corp | 半導体レーザ装置 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017228772A (ja) * | 2016-06-20 | 2017-12-28 | オスラム オプト セミコンダクターズ ゲゼルシャフト ミット ベシュレンクテル ハフツングOsram Opto Semiconductors GmbH | 端面発光型半導体レーザおよび端面発光型半導体レーザの動作方法 |
US10177533B2 (en) | 2016-06-20 | 2019-01-08 | Osram Opto Semiconductors Gmbh | Edge-emitting semiconductor laser and method for operating a semiconductor laser |
US10931084B2 (en) | 2016-06-20 | 2021-02-23 | Osram Oled Gmbh | Edge-emitting semiconductor laser and method for operating a semiconductor laser |
WO2024171681A1 (ja) * | 2023-02-15 | 2024-08-22 | 株式会社フジクラ | 半導体レーザチップ |
Also Published As
Publication number | Publication date |
---|---|
US20080285611A1 (en) | 2008-11-20 |
CN101151776B (zh) | 2010-07-21 |
JPWO2006106886A1 (ja) | 2008-09-11 |
CN101151776A (zh) | 2008-03-26 |
US7778298B2 (en) | 2010-08-17 |
JP5367263B2 (ja) | 2013-12-11 |
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