JP6224495B2 - 半導体レーザ装置 - Google Patents
半導体レーザ装置 Download PDFInfo
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- JP6224495B2 JP6224495B2 JP2014057279A JP2014057279A JP6224495B2 JP 6224495 B2 JP6224495 B2 JP 6224495B2 JP 2014057279 A JP2014057279 A JP 2014057279A JP 2014057279 A JP2014057279 A JP 2014057279A JP 6224495 B2 JP6224495 B2 JP 6224495B2
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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
- H01S5/12—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
- H01S5/1231—Grating growth or overgrowth details
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- H—ELECTRICITY
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- 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
- H01S5/1028—Coupling to elements in the cavity, e.g. coupling to waveguides adjacent the active region, e.g. forward coupled [DFC] structures
- H01S5/1032—Coupling to elements comprising an optical axis that is not aligned with the optical axis of the active region
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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
- H01S5/12—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
- H01S5/1237—Lateral grating, i.e. grating only adjacent ridge or mesa
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- 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
- H01S2301/00—Functional characteristics
- H01S2301/16—Semiconductor lasers with special structural design to influence the modes, e.g. specific multimode
- H01S2301/166—Single transverse or lateral mode
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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
- H01S5/02—Structural details or components not essential to laser action
- H01S5/0206—Substrates, e.g. growth, shape, material, removal or bonding
- H01S5/021—Silicon based substrates
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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
- H01S5/02—Structural details or components not essential to laser action
- H01S5/026—Monolithically integrated components, e.g. waveguides, monitoring photo-detectors, drivers
-
- 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
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
- H01S5/0421—Electrical excitation ; Circuits therefor characterised by the semiconducting contacting layers
- H01S5/0422—Electrical excitation ; Circuits therefor characterised by the semiconducting contacting layers with n- and p-contacts on the same side of the active layer
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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
- H01S5/06—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
- H01S5/0651—Mode control
- H01S5/0653—Mode suppression, e.g. specific multimode
- H01S5/0654—Single longitudinal mode emission
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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
- H01S5/12—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
- H01S5/124—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 incorporating phase shifts
-
- 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
- H01S5/2222—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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- 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
- H01S5/34306—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 emitting light at a wavelength longer than 1000nm, e.g. InP based 1300 and 1500nm lasers
Description
る化合物半導体層と、前記化合物半導体層に積層され、前記第1のメサ構造に対向する表
面に、前記第1のメサ構造の伸長方向に伸びる1本の主回折格子と、前記主回折格子の両
側に配置される2本の副回折格子とを含む回折格子を有するシリコン層と、を備え、前記
主回折格子が前記レーザ光の1次の高次モードの節を含む位置に配置され、前記副回折格
子が前記レーザ光の2次の高次モードの節を含む位置に配置され、かつ前記副回折格子は
、前記主回折格子と周期、および位相が一致するように配置される。
本実施形態の半導体レーザ装置は、レーザ光を発する活性層を含み第1のメサ構造を有する化合物半導体層を備える。また、化合物半導体層側の表面に形成される回折格子を有し、化合物半導体層と積層されるシリコン層を備える。回折格子は、第1のメサ構造の伸長方向に伸びる1本の主回折格子と、主回折格子の両側に形成される2本の副回折格子とを含む。
本実施形態の半導体レーザ装置は、化合物半導体層とシリコン層との間に、厚さ100nm以下の絶縁層を、さらに備えること以外は第1の実施形態と同様である。したがって、第1の実施形態と重複する内容については記述を省略する。
本実施形態の半導体レーザ装置は、シリコン層が第2のメサ構造を備える点、および、化合物半導体層の第1のメサ構造の一部が半絶縁化されている点で第1の実施形態と異なっている。以下、第1の実施形態と重複する内容については記述を省略する。
本実施形態の半導体レーザ装置は、化合物半導体層とシリコン層との間に、厚さ100nm以下の絶縁層を、さらに備えること以外は第3の実施形態と同様である。したがって、第3の実施形態と重複する内容については記述を省略する。
本実施形態の半導体レーザ装置は、第1〜第4の半導体レーザ装置が、活性層がn型半導体層とp型半導体層の間に挟まれているバンド間発光型の半導体レーザであったのに対し、サブバンド間遷移で発光する量子カスケードレーザ(QCL:quantum cascade laser)である点で、異なっている。
3a Siリブ導波路(第2のメサ構造)
4 SiO2層(絶縁層)
12 活性層/導波層(活性層)
15 メサ(第1のメサ構造)
21 回折格子
21a 主回折格子
21b 副回折格子
22 位相シフタ
Claims (12)
- レーザ光を発する活性層を含み、第1のメサ構造を有する化合物半導体層と、
前記化合物半導体層に積層され、前記第1のメサ構造に対向する表面に、前記第1のメ
サ構造の伸長方向に伸びる1本の主回折格子と、前記主回折格子の両側に配置される2本
の副回折格子とを含む回折格子を有するシリコン層と、
を備え、
前記主回折格子が前記レーザ光の1次の高次モードの節を含む位置に配置され、前記副回
折格子が前記レーザ光の2次の高次モードの節を含む位置に配置され、かつ前記副回折格
子は、前記主回折格子と周期、および位相が一致するように配置される半導体レーザ装置
。 - 前記回折格子の中央部に、位相シフタが設けられる請求項1に記載の半導体レーザ装置
。 - 前記回折格子の基本(0次)モードに対する結合係数κと、前記回折格子の前記第1の
メサ構造の伸長方向の長さで規定される共振器長Lとの積κLが1以上1.5以下である
請求項2記載の半導体レーザ装置。 - 前記主回折格子の幅が、前記第1のメサ構造の前記シリコン層側の幅の10%以下であ
る請求項1ないし請求項3いずれか一項記載の半導体レーザ装置。 - 前記シリコン層が第2のメサ構造を備え、前記回折格子が前記第2のメサ構造表面に形
成され、前記主回折格子の幅が、前記第2のメサ構造の幅の10%以下である請求項1な
いし請求項3いずれか一項記載の半導体レーザ装置。 - 前記副回折格子の幅が、前記主回折格子の幅よりも狭く、かつ、前記主回折格子の幅の
半分より大きい請求項1ないし請求項5いずれか一項記載の半導体レーザ装置。 - 前記主回折格子が前記第1のメサ構造の幅の中点直下に配置され、前記副回折格子が前
記第1のメサ構造の幅を3等分する点の直下に配置される請求項1ないし請求項4いずれ
か一項記載の半導体レーザ装置。 - 前記シリコン層が第2のメサ構造を備え、前記回折格子が前記第2のメサ構造表面に形
成され、前記主回折格子が前記第2のメサ構造の幅の中点に配置され、前記副回折格子が
前記第2のメサ構造の幅を3等分する点に配置される請求項1ないし請求項3いずれか一
項記載の半導体レーザ装置。 - 前記化合物半導体層と前記シリコン層が直接接する請求項1ないし請求項8いずれか一
項記載の半導体レーザ装置。 - 前記化合物半導体層と前記シリコン層との間に、厚さ100nm以下の絶縁層を、さら
に備える請求項1ないし請求項8いずれか一項記載の半導体レーザ装置。 - 前記回折格子が前記シリコン層表面に設けられ、シリコン酸化膜で充填された凹部で形
成される請求項1ないし請求項9いずれか一項記載の半導体レーザ装置。 - 前記半導体レーザ装置が、超格子のサブバンド間遷移で発光する量子カスケードレーザ
である請求項1ないし請求項4いずれか一項記載の半導体レーザ装置。
Priority Applications (2)
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JP2014057279A JP6224495B2 (ja) | 2014-03-19 | 2014-03-19 | 半導体レーザ装置 |
US14/625,103 US9431793B2 (en) | 2014-03-19 | 2015-02-18 | Semiconductor laser device |
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JP2014057279A JP6224495B2 (ja) | 2014-03-19 | 2014-03-19 | 半導体レーザ装置 |
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JP2015179783A JP2015179783A (ja) | 2015-10-08 |
JP6224495B2 true JP6224495B2 (ja) | 2017-11-01 |
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JP (1) | JP6224495B2 (ja) |
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WO2010100738A1 (ja) * | 2009-03-05 | 2010-09-10 | 富士通株式会社 | 半導体レーザ、シリコン導波路基板、集積素子 |
US7961765B2 (en) | 2009-03-31 | 2011-06-14 | Intel Corporation | Narrow surface corrugated grating |
US8831049B2 (en) * | 2012-09-14 | 2014-09-09 | Laxense Inc. | Tunable optical system with hybrid integrated laser |
-
2014
- 2014-03-19 JP JP2014057279A patent/JP6224495B2/ja not_active Expired - Fee Related
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2015
- 2015-02-18 US US14/625,103 patent/US9431793B2/en not_active Expired - Fee Related
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US9431793B2 (en) | 2016-08-30 |
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