WO2002021578A1 - Element laser semi-conducteur - Google Patents
Element laser semi-conducteur Download PDFInfo
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- WO2002021578A1 WO2002021578A1 PCT/JP2001/007724 JP0107724W WO0221578A1 WO 2002021578 A1 WO2002021578 A1 WO 2002021578A1 JP 0107724 W JP0107724 W JP 0107724W WO 0221578 A1 WO0221578 A1 WO 0221578A1
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- semiconductor laser
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- laser device
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Classifications
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- 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
- H01S5/16—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
-
- 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
- H01S5/2231—Buried stripe structure with inner confining structure only between the active layer and the upper electrode
-
- 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
- H01S2304/00—Special growth methods for semiconductor lasers
- H01S2304/04—MOCVD or MOVPE
-
- 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
- H01S5/16—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface
- H01S5/164—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface with window regions comprising semiconductor material with a wider bandgap than the active layer
-
- 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
- H01S5/16—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface
- H01S5/168—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface with window regions comprising current blocking layers
-
- 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
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/305—Structure or shape of the active region; Materials used for the active region characterised by the doping materials used in the laser 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
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/34—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers
- H01S5/343—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser
- H01S5/34313—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser with a well layer having only As as V-compound, e.g. AlGaAs, InGaAs
Definitions
- the present invention relates to a high-power semiconductor laser having a current non-injection region near an end face, and particularly to a high end face optical damage level and high reliability in long-term continuous operation.
- Semiconductor laser devices are used in various fields, including pumping light sources for optical amplifiers used in the communication field. High power operation may be required for these lasers. However, there is a problem that it is difficult to obtain a semiconductor laser having a sufficient life in high-power operation. In general, it is known that the main cause of deterioration of semiconductor lasers is catastrophic optical damage (COD) at the end face. Optical damage destruction is caused by the following process. First, non-radiative recombination occurs due to defects near the end face, causing a temperature rise. The rise in temperature also causes the bandgap to shrink and reabsorb light, leading to a vicious cycle when the temperature rises further. Through these processes, melting of the end face is induced, the light output is reduced, and irreversible blasting occurs.
- COD catastrophic optical damage
- One way to prevent optical damage from destruction at the end face is to use a method in which no current is injected near the end face. In this case, the current injection to the vicinity of the end face is suppressed, so that the state is not excited near the end face. For this reason, non-radiative recombination is suppressed, and the level of end face optical damage can be improved.
- a method of implanting ions near the end surface to make the end surface non-current-injected may damage the semiconductor laser device.
- each of these end face current block structures is formed apart from the waveguide layer. When a current block structure is provided, it is conceivable that the current may sneak. It is considered that the current wraparound has a greater effect when the distance between the current block structure and the active layer is longer.
- any of the above-mentioned prior arts is not always a preferable method for forming a current block structure near the end face.
- the present invention has been made to solve the above problems, and has a current block structure near the end face with a structure that is easy to manufacture, does not damage semiconductor laser elements, and minimizes characteristic deterioration. It is an object of the present invention to provide a semiconductor laser device having a high level of optical damage due to end face damage and high reliability in long-term continuous operation.
- the present invention provides an n-type and p-type cladding layer formed so as to sandwich an active layer, and an n-type and p-type cladding layer sandwiching the outside of these waveguide layers.
- a semiconductor laser device comprising a first current block layer formed and defining a stripe-shaped current injection region extending in a direction connecting a front end surface from which laser light is emitted and a rear end surface facing the front end surface, A second current block layer formed so as to cross the stripe-shaped current injection region near the front end face, wherein the first current block layer and the second current block layer are semiconductor laser elements formed of the same layer. is there.
- one side or both sides of the first current block layer formed so as to sandwich the stripe-shaped current injection region extending in the cavity direction. Since the second current block layer for preventing current injection in the vicinity of the side end face is formed with the same layer, that is, with the same composition and the same film thickness, manufacture is easy, and compared with the conventional case at the time of manufacture. Since the number of processing steps does not increase, the current block structure can be provided near the end face without damaging the semiconductor laser element. As a result, a semiconductor laser device having a high level of edge optical damage and destruction and high reliability in long-term continuous operation can be provided.
- a current block layer may be provided not only on the front end face but also near the rear end face. One of both sides of the second current blocking layer reaches the end face.
- a refractive index waveguide structure can be formed by providing an equivalent refractive index difference between the current injection region and the region where the current block layer exists. Furthermore, a carrier block layer having an energy gap larger than that of the waveguide layer is provided between the active layer and the waveguide layer to confine carriers and expand the waveguide mode in the epitaxy direction. The concentration of the light intensity on the layer can be suppressed to further increase the level of damage to the end face optical damage.
- the first and second current blocking layers be formed in the waveguide layer.
- the first and second current block layers may be formed adjacent to the waveguide layer.
- the width of the second current block layer is practically preferably 2 to 25 ⁇ um.
- the waveguide layer near the end face is formed by the low refractive index layer near the end face. The profile can be shifted from the active layer.
- the beam energy density near the active layer near the end face can be reduced, and a semiconductor laser element with a large improvement in the end face optical damage level and high reliability in long-term continuous operation can be provided.
- the waveguide layer is near the active layer, the influence of the current sneak into the active layer can be reduced by providing the end face current block structure in the waveguide layer.
- the level of optical damage at the end face can be improved, and the current block area necessary for ensuring high reliability in long-term continuous operation can be reduced. . If the current block area can be narrowed, the effect of light absorption in this area can be reduced. Characteristics (threshold, slope efficiency, temperature characteristics, etc.) can be minimized.
- the active layer of the semiconductor laser device of the present invention is made of InGaAs, and the waveguide layer is made of GaAs not containing A1.
- InGaAs for the quantum well of the active layer, it becomes possible to use GaAs without A1 for the waveguide layer. Accordingly, in the process of forming the current blocking layer, there is no oxidation at the regrowth interface, so that the process is stable and a good film can be formed. Also, by using a GaAs waveguide layer that does not contain A1, the electric resistance and the thermal resistance can be reduced.
- the waveguide mode near the end face will be affected by this layer.
- the waveguide mode can be controlled by changing the position of the current block layer near the end face embedded in the waveguide layer, the distance from the end face, and the refractive index.
- the beam energy density near the active layer is represented by the optical confinement coefficient ⁇ .
- ⁇ The beam energy density near the active layer.
- the relationship of n is
- the beam energy density near the active layer at the end face is reduced
- the light confinement coefficient at the position of the current injection region ⁇ ld Injeeti . n is 0.084, and the optical confinement coefficient in the film thickness direction at the current non-injection region near the end face is ld ld Non . injecti . n is 0.0071, and the beam energy density near the active layer near the end face is reduced.
- the formula for calculating the optical confinement coefficient 1 of the one-dimensional slab waveguide used at this time is as follows: It is.
- E (x) is the electric field in the film thickness direction
- a and B are the maximum and minimum values of the electric field coordinates, respectively.
- a and b are values determined by the boundary of the active layer.
- the guided mode propagates the beam dynamically.
- the manner in which the waveguide mode is affected by the current block layer near the end face can be analyzed by, for example, computer simulation using the beam propagation method.
- FIG. 7 shows the structure shown in FIG. 3 of an embodiment to be described later. Of both sides of the current block layer 23 provided at the front end, the side opposite to the side contacting the front end face 40 is shown.
- E (x, y) is the electric field
- (A, B) and (C, D) are the maximum and minimum values of the electric field coordinates, respectively.
- (A, b) and (c, d) are values determined by the boundaries of the active layer.
- the width of the current blocking layer at the end face is around 5 // m, and the optical confinement coefficient is minimal at around 15 / z m.
- the optimum value of the width of the current block layer near the end face that minimizes the light confinement coefficient of the end face is appropriately designed according to the layer configuration.
- the width at which the light confinement coefficient is minimized also changes by changing the position, width, and refractive index of the current block layer near the end face.
- FIG. 1A is a perspective view of an example of the semiconductor laser device of the present invention
- FIG. 1B is a partially enlarged view thereof.
- FIG. 2 is a diagram showing an example of the current block layer according to the present invention.
- 3A to 3C are cross-sectional views of the semiconductor laser device shown in FIG.
- 4A to 4C are diagrams showing the steps of manufacturing the semiconductor laser shown in FIG.
- FIG. 5 is a graph showing the output characteristics of the semiconductor laser device.
- FIG. 6A and FIG. 6B are diagrams showing the change over time of the injection current of the semiconductor laser device.
- FIG. 7 is a diagram showing the relationship between the width of the current non-injection region at the end face and the light confinement coefficient.
- FIG. 1A is a perspective view showing an example of a semiconductor laser device of the present invention
- FIG. 2 shows a layer structure virtually divided for easy understanding of a current block layer 23 according to the present invention.
- Figure 3A to 3C are cross-sectional views of FIG. 2, and FIG. 3A is a cross section taken in a direction A—A ′ perpendicular to the laser cavity length direction, and is located away from the emission end face (front end face) and the rear end face. is there.
- FIG. 3B shows a cross section BB ′ parallel to AA ′ near the emission end face.
- Figure 3C is a cross section taken along line C-C 'of the center of the stripe where light is guided in the cavity length direction.
- a buffer layer 32, an n-side cladding layer 31, an n-side waveguide layer 30, an active layer region 35, a p-side waveguide layer 24, and a current block layer are formed on an n_GaAs substrate 33.
- 23, a p-side waveguide layer 22, a p-side cladding layer 21, and a p-side cap layer 20 are formed.
- the active layer region 35 has an active layer 27 composed of an n-side carrier block layer 29, an n-side side barrier layer 28, a quantum well layer and a barrier layer interpolating them, and an p-side It comprises a side barrier layer 26 and a p-side carrier block layer 25.
- the current block layers 23 are provided on both sides of the stripe so as to define the stripe S in the resonator length direction, and are provided across the stripe S near the front end face 40 and the rear end face 41.
- FIG. 4A to 4C show the cross-sections taken along the line AA ′ of FIG. 2 arranged in the order of the manufacturing process.
- Figure 4A the n-type
- a buffer layer 32 A 1 0. 09 G a 0. 91 A s (2.5 ⁇ m) made of n-type (1 X 10 24 nf 3) clad layer 3 1, G a A s ( 0.45 / im) made of n-type (1 X 10 23 m- 3) waveguide layer 30, A 1 0. 4 .G a A s (0.02 111) made of n-type (1 X 10 24 m- 3) Kiyaryapurokku layer 2 9, A 1 0-1 G a. . 9 A s Saidobaria layer 28 made of (0.05 ⁇ ), 2 pieces of I n 018 G a 0.
- . 9 A s active layer 27 composed of a barrier layer made of (0.006 ⁇ m), A 1 a 0. 9 A s Sa Idobaria layer 26 made of (0.05 ⁇ m), A 1 o. 4 G a 0. 6 A s (0.02 ⁇ m) p-type (1 ⁇ 10 24 m— 3 ) carrier block layer 25, G a s (0.1 m) p-type (1 ⁇ 10 24 m— 3 ) conduction
- the wave layer 24 is sequentially grown.
- the MOCVD method was used for the first crystal growth, other crystal growth methods such as the MBE method can be used.
- the substrate on which the crystal was grown in this manner was taken out of the crystal growth apparatus and put into, for example, an electron beam evaporation apparatus, and a mask 34 of, for example, SiO 2 was formed on the entire surface. Thereafter, the mask other than the central region that becomes the striped window is removed by using photolithography technology to form a striped mask 34. At this time, the mask near the end face is also removed to form a current non-injection region on the end face. Since the mask 34 is extremely thin, it can be formed with high accuracy and high reproducibility even by the conventional photolithography technology.
- the substrate with the mask 34 is returned to the crystal growth apparatus, and the ⁇ -type (1 ⁇ 10 24 m ′′ 3 ) A is placed on the p-type (1 ⁇ 10 24 ⁇ 3 ) waveguide layer 24. 1.,. 9 when G a .. 91 a s (0. 18 / m) or Ranaru current blocking layer 2 3 is selectively grown, as shown in FIG. 4 B, crystals in the region where the mask 3 4 adheres A layer structure in which growth is not performed is obtained Remove the mask 34 with, for example, a hydrofluoric acid aqueous solution
- the current blocking layer may have a layer structure of two or more layers. After the formation, only the central region through which the current flows may be removed by the etching process, so that the first current block layer and the second current block layer can be simultaneously formed as the same layer.
- the cap layer 20 of (1.4 m) one example of the semiconductor laser device of the present invention shown in FIG. 2 is obtained. Thereafter, when an electrode is formed on the substrate and the cap layer 20 and a current is passed, laser oscillation is enabled by carrier injection.
- the semiconductor laser device thus obtained has a current block layer in the waveguide layer near the end face.
- the optical confinement coefficient in the film thickness direction in the current injection region of this semiconductor laser ⁇ ld Injeeti . n does not depend on the cavity length direction and is constant.
- the light intensity ratio gamma 2d Facet that against the propagation mode in the active layer at the front surface when allowed to propagate with a bicycloalkenyl over beam propagation method waveguide modes of the current injection region current injection region and the second current proc ⁇ 2d Injecti by changing layer position, width and refractive index. can be smaller than n .
- r '2d Facet 7 is gamma 2d injecti. can be smaller than n, with an active layer on the end face The ⁇ 2d Facet can be made smaller by selecting the width of the current block layer so that the nearby r 2d Pacet is between adjacent inflection points including the local minimum.
- the position of the current blocking layer is not limited to the inside of the waveguide layer, and may be adjacent to the waveguide layer.
- the semiconductor laser device configured as described above current injection to the vicinity of the end face is suppressed, so that the semiconductor laser element is not excited near the end face. For this reason, non-radiative recombination is suppressed, and the level of edge optical damage can be improved.
- the semiconductor laser device of the present invention may have a bridge structure in which the active region is sandwiched between current block layers.
- first current block layer and the second current block layer may be continuous as in this embodiment, or may be partially interrupted so as not to deteriorate the characteristics.
- FIG. 5 shows the state of light output when an overcurrent is applied to the semiconductor laser device obtained as described above.
- several samples were prepared in which the width X of the current block layer crossing the stripe near the end face embedded in the waveguide layer was changed. In the vicinity of the end face, one edge of the current block layer is in contact with the end face, and the other edge is at a position X away from the end face in the resonator length direction.
- devices with a current block layer near the end face are completely saturated with heat without causing optical damage and destruction.
- FIGS. 6A and 6B show the results obtained by controlling the injection current so that a constant laser light output is output at an ambient temperature of 70 ° C., and measuring the time change of the injection current.
- FIG. 6A shows the result for a semiconductor laser device without a current blocking layer near the end face. The current is controlled so that the output is constant, so the current will increase if it deteriorates. From Fig. 6A, it can be seen that the semiconductor laser device with no current blocking layer near the end face has deteriorated from the initial stage.
- the present invention is not limited to the above-described embodiment, and is applicable to semiconductor lasers having various structures and compositions.
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Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002525901A JP3974852B2 (ja) | 2000-09-08 | 2001-09-06 | 半導体レーザ素子 |
EP01963461A EP1248296A4 (en) | 2000-09-08 | 2001-09-06 | SEMICONDUCTOR LASER ELEMENT |
US10/129,550 US6822990B2 (en) | 2000-09-08 | 2001-09-06 | Semiconductor laser device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000-274013 | 2000-09-08 | ||
JP2000274013 | 2000-09-08 |
Publications (1)
Publication Number | Publication Date |
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WO2002021578A1 true WO2002021578A1 (fr) | 2002-03-14 |
Family
ID=18759850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2001/007724 WO2002021578A1 (fr) | 2000-09-08 | 2001-09-06 | Element laser semi-conducteur |
Country Status (5)
Country | Link |
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US (1) | US6822990B2 (ja) |
EP (1) | EP1248296A4 (ja) |
JP (1) | JP3974852B2 (ja) |
CN (1) | CN1204665C (ja) |
WO (1) | WO2002021578A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005524234A (ja) * | 2002-04-24 | 2005-08-11 | ブックハム テクノロジー ピーエルシー | 高出力半導体レーザ・ダイオードおよびそのようなダイオードの製造方法 |
JP2011103494A (ja) * | 2011-02-14 | 2011-05-26 | Furukawa Electric Co Ltd:The | 半導体レーザ素子および通信システム |
US8615026B2 (en) | 2009-07-06 | 2013-12-24 | Furukawa Electric Co., Ltd. | Method of manufacturing semiconductor optical device, method of manufacturing semiconductor optical laser element, and semiconductor optical device |
WO2020022116A1 (ja) * | 2018-07-27 | 2020-01-30 | パナソニックIpマネジメント株式会社 | 半導体レーザ素子 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3911461B2 (ja) * | 2002-08-29 | 2007-05-09 | シャープ株式会社 | 半導体レーザ装置およびその製造方法 |
GB2471266B (en) * | 2009-06-10 | 2013-07-10 | Univ Sheffield | Semiconductor light source and method of fabrication thereof |
CN112260060B (zh) * | 2020-12-22 | 2021-03-09 | 武汉敏芯半导体股份有限公司 | 一种分布式反馈激光器 |
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EP1104057B1 (en) * | 1999-11-19 | 2005-07-27 | Fuji Photo Film Co., Ltd. | High-power semiconductor laser device having current confinement structure and index-guided structure |
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2001
- 2001-09-06 US US10/129,550 patent/US6822990B2/en not_active Expired - Lifetime
- 2001-09-06 WO PCT/JP2001/007724 patent/WO2002021578A1/ja active Application Filing
- 2001-09-06 JP JP2002525901A patent/JP3974852B2/ja not_active Expired - Lifetime
- 2001-09-06 CN CNB018035345A patent/CN1204665C/zh not_active Expired - Lifetime
- 2001-09-06 EP EP01963461A patent/EP1248296A4/en not_active Withdrawn
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005524234A (ja) * | 2002-04-24 | 2005-08-11 | ブックハム テクノロジー ピーエルシー | 高出力半導体レーザ・ダイオードおよびそのようなダイオードの製造方法 |
JP4827410B2 (ja) * | 2002-04-24 | 2011-11-30 | オクラロ テクノロジー リミテッド | 高出力半導体レーザ・ダイオードおよびそのようなダイオードの製造方法 |
US8615026B2 (en) | 2009-07-06 | 2013-12-24 | Furukawa Electric Co., Ltd. | Method of manufacturing semiconductor optical device, method of manufacturing semiconductor optical laser element, and semiconductor optical device |
JP2011103494A (ja) * | 2011-02-14 | 2011-05-26 | Furukawa Electric Co Ltd:The | 半導体レーザ素子および通信システム |
WO2020022116A1 (ja) * | 2018-07-27 | 2020-01-30 | パナソニックIpマネジメント株式会社 | 半導体レーザ素子 |
JPWO2020022116A1 (ja) * | 2018-07-27 | 2021-08-02 | ヌヴォトンテクノロジージャパン株式会社 | 半導体レーザ素子 |
US11710941B2 (en) | 2018-07-27 | 2023-07-25 | Nuvoton Technology Corporation Japan | Semiconductor laser element |
JP7406487B2 (ja) | 2018-07-27 | 2023-12-27 | ヌヴォトンテクノロジージャパン株式会社 | 半導体レーザ素子 |
Also Published As
Publication number | Publication date |
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US20020171094A1 (en) | 2002-11-21 |
US6822990B2 (en) | 2004-11-23 |
JP3974852B2 (ja) | 2007-09-12 |
JPWO2002021578A1 (ja) | 2004-01-15 |
EP1248296A4 (en) | 2006-05-24 |
CN1394372A (zh) | 2003-01-29 |
EP1248296A1 (en) | 2002-10-09 |
CN1204665C (zh) | 2005-06-01 |
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