JP7400282B2 - 面発光レーザ、面発光レーザ装置、光源装置及び検出装置 - Google Patents
面発光レーザ、面発光レーザ装置、光源装置及び検出装置 Download PDFInfo
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- JP7400282B2 JP7400282B2 JP2019168975A JP2019168975A JP7400282B2 JP 7400282 B2 JP7400282 B2 JP 7400282B2 JP 2019168975 A JP2019168975 A JP 2019168975A JP 2019168975 A JP2019168975 A JP 2019168975A JP 7400282 B2 JP7400282 B2 JP 7400282B2
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- 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
- H01S5/3432—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 the whole junction comprising only (AI)GaAs
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- 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
- H01S5/34346—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 characterised by the materials of the barrier layers
- H01S5/34353—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 characterised by the materials of the barrier layers based on (AI)GaAs
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- H01S5/18358—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL] containing spacer layers to adjust the phase of the light wave in the cavity
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Description
まず、第1の実施形態について説明する。第1の実施形態は、裏面出射型の面発光レーザ素子を備えた面発光レーザに関する。
次に、第2の実施形態について説明する。第2の実施形態は、主に、n側メサポスト領域156の配置の点で第1の実施形態と相違する。図12は、第2の実施形態に係る面発光レーザのレイアウトの概要を示す模式図である。
次に、第3の実施形態について説明する。第3の実施形態は、主に、発光単位の構成の点で第1の実施形態と相違する。図13は、第3の実施形態に係る面発光レーザのレイアウトの概要を示す模式図である。
次に、第4の実施形態について説明する。第4の実施形態は、主に、発光単位の構成の点で第1の実施形態と相違する。図14は、第4の実施形態に係る面発光レーザのレイアウトの概要を示す模式図である。
次に、第5の実施形態について説明する。第5の実施形態は、主に、p側電極の構成の点で第1の実施形態と相違する。図15は、第5の実施形態に係る面発光レーザの内部構造を示す断面図である。
次に、第6の実施形態について説明する。第6の実施形態は、主に、n側電極及びn側コンタクト領域の構成の点で第1の実施形態と相違する。図19は、第6の実施形態に係る面発光レーザのレイアウトの概要を示す模式図である。図20及び図21は、第6の実施形態に係る面発光レーザの内部構造を示す断面図である。図20は、図19中のXX-XX線に沿った断面図に相当する。図21は、図19中のXXI-XXI線に沿った断面図に相当する。
次に、第7の実施形態について説明する。第7の実施形態は、主に、発光単位の構成の点で第6の実施形態と相違する。図22は、第7の実施形態に係る面発光レーザのレイアウトの概要を示す模式図である。
次に、第8の実施形態について説明する。第8の実施形態は、主に、発光単位の構成の点で第6の実施形態と相違する。図23は、第8の実施形態に係る面発光レーザのレイアウトの概要を示す模式図である。
次に、第9の実施形態について説明する。第9の実施形態は、主に、n側電極、n側コンタクト領域及びn側メサポスト領域の構成の点で第6の実施形態と相違する。図24は、第9の実施形態に係る面発光レーザのレイアウトの概要を示す模式図である。図25は、第9の実施形態に係る面発光レーザの内部構造を示す断面図である。図25は、図24中のXXV-XXV線に沿った断面図に相当する。
次に、第10の実施形態について説明する。第10の実施形態は、主に、p側電極の構成の点で第9の実施形態と相違する。図26は、第10の実施形態に係る面発光レーザの内部構造を示す断面図である。
次に、第11の実施形態について説明する。第11の実施形態は、第1~第10の実施形態のいずれかに係る面発光レーザを備えた光源装置および検出装置に関する。図27は、検出装置の一例としての測距装置10の概要を示したものである。
11 光源装置
13 受光素子
15 光学系
18 受光光学系
100、200、300、400、500、600、700、800、900、1000 面発光レーザ
102 下部半導体多層膜反射鏡
104 活性層
106 上部半導体多層膜反射鏡
108 被選択酸化層
108a 酸化領域
108b 非酸化の領域
112 p側電極
113 n側電極
116 p側コンタクト層
117 n側コンタクト層
120、320、420 発光単位
151 面発光レーザ素子
155 p側メサポスト領域
156、956 n側メサポスト領域
157、657、957 n側コンタクト領域
530 絶縁層
Claims (13)
- 基板の第1の面上に設けられた複数の面発光レーザ素子と、
前記複数の面発光レーザ素子に電気的に接続される第1の電極及び第2の電極と、
前記第1の面上に、前記複数の面発光レーザ素子から離間して設けられた、1または複数の第1のメサポスト領域と、
を含み、
前記面発光レーザ素子の各々は、
前記基板側から順に、
前記第1の電極に電気的に接続される第1の導電型の半導体と、
活性層と、
前記第2の電極に電気的に接続される第2の導電型の半導体と、
を有し、
前記第1の導電型の半導体は第1の反射鏡を含み、
前記第2の導電型の半導体は第2の反射鏡を含み、
前記第1の電極は、前記第1の面上または前記第1の導電型の半導体に含まれる半導体層上の第1のコンタクト領域に接続され、
1又は2以上の前記面発光レーザ素子を発光単位とし、
前記第1の電極は複数の前記発光単位に電気的に接続され、
前記第2の電極は前記発光単位ごとに電気的に接続され、
前記第1の電極の前記第1のメサポスト領域上の部分である第1の接続部を複数有する、
面発光レーザ。 - 前記第1のメサポスト領域は、前記面発光レーザ素子と共通する半導体積層体を含む、請求項1に記載の面発光レーザ。
- 前記基板に垂直な方向からの平面視で、前記第1のコンタクト領域の一方側及び他方側の両方に前記発光単位がある、請求項2に記載の面発光レーザ。
- 複数の前記発光単位は、前記基板上に二次元的に配置され、
前記第1のコンタクト領域は、隣り合う前記発光単位の間にある第1の部分を有する、請求項1乃至3のいずれか1項に記載の面発光レーザ。 - 前記基板に平行かつ互いに垂直な2つの方向を第1の方向及び第2の方向として、
前記第1の部分は前記第1の方向に延び、
前記第1の方向に並ぶ前記発光単位の集合を発光単位群としたとき、前記第1の部分は、前記第2の方向で隣り合う発光単位群の間に位置する、請求項4に記載の面発光レーザ。 - 前記第1の部分と前記発光単位群とが交互に複数、前記第2の方向に配列しており、
前記第1のコンタクト領域は、前記第2の方向に延び、複数の前記第1の部分を互いに接続する第2の部分を有する、請求項5に記載の面発光レーザ。 - 前記第2の部分上に設けられた第1の絶縁層を有し、
前記第2の電極は、前記第1の絶縁層上の第1の伝熱部を有する、請求項6に記載の面発光レーザ。 - 前記発光単位は、当該発光単位に含まれる前記面発光レーザ素子から離間して前記基板上に設けられた第2のメサポスト領域を有し、
前記第2の電極は、前記第2のメサポスト領域上の第2の接続部を有する、請求項1乃至7のいずれか1項に記載の面発光レーザ。 - 前記第2の電極は、前記面発光レーザ素子上の第2の接続部を有する、請求項1乃至7のいずれか1項に記載の面発光レーザ。
- 前記基板側から光を出射する、請求項1乃至9のいずれか1項に記載の面発光レーザ。
- 実装基板と、
前記実装基板に実装された、請求項1乃至10のいずれか1項に記載の面発光レーザと、
を有する、面発光レーザ装置。 - 請求項11に記載の面発光レーザ装置と、
前記面発光レーザ装置を駆動する駆動装置と、
を備え、
前記面発光レーザから外部へ光を出射する、光源装置。 - 請求項12に記載の光源装置と、
前記面発光レーザから外部へ出射され、対象物で反射された光を検出可能な受光素子と、
を備える、検出装置。
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