JP7351185B2 - 量子カスケードレーザ - Google Patents
量子カスケードレーザ Download PDFInfo
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- 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
- H01S5/3401—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 having no PN junction, e.g. unipolar lasers, intersubband lasers, quantum cascade lasers
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- H01S5/12—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 the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
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- 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
- H01S5/2222—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 having special electric properties
- H01S5/2224—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 having special electric properties semi-insulating semiconductors
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- 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
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- 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
- H01S5/3086—Structure or shape of the active region; Materials used for the active region characterised by the doping materials used in the laser structure doping of the active layer
- H01S5/309—Structure or shape of the active region; Materials used for the active region characterised by the doping materials used in the laser structure doping of the active layer doping of barrier layers that confine charge carriers in the laser structure, e.g. the barriers in a quantum well structure
Description
一実施形態に係る量子カスケードレーザは、第1方向にレーザ光を出射する出射面を有するレーザ構造体と、前記出射面からの前記レーザ光を受ける入射面と、集光された前記レーザ光を出射する凸状面と、を有するレンズと、を備え、前記レーザ構造体は、半導体基板と、前記半導体基板の主面の第1領域上に設けられ前記第1方向に延在するメサ導波路と、を備え、前記レンズは、半導体を含み、前記半導体基板の前記主面の第2領域上に設けられており、前記第1領域及び前記第2領域は前記第1方向に配列される。
以下、添付図面を参照しながら本開示の実施形態が詳細に説明される。図面の説明において、同一又は同等の要素には同一符号が用いられ、重複する説明は省略される。
Reff=100-Γ×(1-R/100) … (1)
Γは、出射面10aのうち反射膜20によって覆われていない領域(スリット20aの領域)に分布する光強度の百分率(%)を表す。Γは、ビーム伝搬法(BPM:Beam Propagation Method)により計算される。Rは、反射膜20が設けられていない状態において発振波長に対する出射面10aの反射率(%)を表す。例えば、Γが46%、Rが24%の場合、Reffは65%となる。
10…レーザ構造体
10a…出射面
10b…反射面
10c…本体
10d…第1突出部
10e…第2突出部
12…半導体基板
12a…凸部
12s…主面
12s1…第1領域
12s2…第2領域
12s3…第3領域
14…メサ導波路
14a…下部クラッド層
14b…コア層
14be…端面
14be1…第1領域
14be2…第2領域
14c…回折格子層
14c1…凹部
14d…上部クラッド層
14e…コンタクト層
14s…側面
16…電流ブロック領域
20…反射膜
20a…スリット
22…保護膜
30…反射膜
32…保護膜
40…上部電極
50…下部電極
60…レンズ
60a…入射面
60b…凸状面
62…台座
62a…凸部
64…半導体メサ
64a~64e…半導体層
64s…側面
66…半導体埋込領域
112…半導体基板
114a…半導体層
114b…半導体層
114c…半導体層
114d…半導体層
114e…半導体層
120…金属膜
140…金属膜
C1…実線
C2…実線
C3…実線
C4…実線
CT…切断線
L…レーザ光
M1…マスク
M2…マスク
M3…レジストマスク
M4…レジストマスク
M5…レジストマスク
M5a…開口
Ma…スリット
Mb…スリット
SP…スポットサイズ
SP1…空隙
SP2…空隙
T1…トレンチ
T2…トレンチ
U…単位構造
Claims (3)
- 第1方向にレーザ光を出射する出射面を有するレーザ構造体と、
前記出射面からの前記レーザ光を受ける入射面と、集光された前記レーザ光を出射する凸状面と、を有するレンズと、
を備え、
前記レーザ構造体は、半導体基板と、前記半導体基板の主面の第1領域上に設けられ前記第1方向に延在するメサ導波路と、前記メサ導波路の側面を埋め込む電流ブロック領域と、を備え、前記電流ブロック領域は、アンドープ又は半絶縁性の半導体を含み、
前記レンズは、半導体を含み、前記半導体基板の前記主面の第2領域上に設けられており、
前記レンズは、前記第1方向に延在する半導体メサと、前記半導体メサの側面を埋め込む半導体埋込領域とを備え、前記半導体埋込領域は、アンドープ又は半絶縁性の半導体を含み、
前記第1領域及び前記第2領域は前記第1方向に配列される、量子カスケードレーザ。 - 前記レンズは、平凸レンズであり、前記凸状面は、前記半導体基板の前記主面に交差する第2方向から見て凸状に湾曲している、請求項1に記載の量子カスケードレーザ。
- 前記出射面上に設けられた反射膜を更に備え、
前記反射膜は、前記レーザ光を透過させるスリットを有する、請求項1又は請求項2に記載の量子カスケードレーザ。
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JP2019200633A JP7351185B2 (ja) | 2019-11-05 | 2019-11-05 | 量子カスケードレーザ |
US17/086,640 US11621541B2 (en) | 2019-11-05 | 2020-11-02 | Quantum cascade laser |
CN202011209595.3A CN112787219A (zh) | 2019-11-05 | 2020-11-03 | 量子级联激光器 |
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JP2019200633A JP7351185B2 (ja) | 2019-11-05 | 2019-11-05 | 量子カスケードレーザ |
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JP7351185B2 true JP7351185B2 (ja) | 2023-09-27 |
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JP (1) | JP7351185B2 (ja) |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001189519A (ja) | 1999-12-28 | 2001-07-10 | Toshiba Corp | 半導体レーザ装置 |
US20020102756A1 (en) | 2000-08-31 | 2002-08-01 | Bernd Borchert | Semiconductor laser chip and method for fabricating a semiconductor laser chip |
JP2019015563A (ja) | 2017-07-05 | 2019-01-31 | 浜松ホトニクス株式会社 | 流体分析装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS61253881A (ja) * | 1985-05-07 | 1986-11-11 | Hitachi Ltd | 分布帰還型半導体レ−ザ |
JPH0744313B2 (ja) * | 1989-02-24 | 1995-05-15 | 日本電信電話株式会社 | 半導体レーザ装置 |
JP2017022234A (ja) * | 2015-07-09 | 2017-01-26 | 住友電気工業株式会社 | 量子カスケードレーザ |
JP2018098263A (ja) * | 2016-12-08 | 2018-06-21 | 住友電気工業株式会社 | 量子カスケード半導体レーザ |
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- 2020-11-02 US US17/086,640 patent/US11621541B2/en active Active
- 2020-11-03 CN CN202011209595.3A patent/CN112787219A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001189519A (ja) | 1999-12-28 | 2001-07-10 | Toshiba Corp | 半導体レーザ装置 |
US20020102756A1 (en) | 2000-08-31 | 2002-08-01 | Bernd Borchert | Semiconductor laser chip and method for fabricating a semiconductor laser chip |
JP2019015563A (ja) | 2017-07-05 | 2019-01-31 | 浜松ホトニクス株式会社 | 流体分析装置 |
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US20210135432A1 (en) | 2021-05-06 |
CN112787219A (zh) | 2021-05-11 |
US11621541B2 (en) | 2023-04-04 |
JP2021077670A (ja) | 2021-05-20 |
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