JP4638753B2 - 半導体光素子および半導体光素子の製造方法 - Google Patents
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- 238000005530 etching Methods 0.000 claims description 18
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
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- 239000000463 material Substances 0.000 description 3
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
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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
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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
- H01S5/20—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
- H01S5/227—Buried mesa structure ; Striped 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
- H01S5/30—Structure or shape of the active region; Materials used for 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
- H01S5/30—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
- H01S5/34346—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
- H01S5/34366—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 InGa(Al)AS
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- General Physics & Mathematics (AREA)
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- Semiconductor Lasers (AREA)
Description
エピタキシャル成長工程では、基板全体が約600℃に加熱されるため、p型InPクラッド層8からのドーパントの熱拡散が起こる。しかし、活性層上の全領域にドーパントの固溶濃度が高いInGaAsP層3が存在するので、ドーパントの熱拡散量が回折格子の有無や開口幅に依存しない。この結果、安定した光出力、閾値電流、スロープ効率を得ることができる。
これらの工程を経た後、素子長が200μmとなるようにウェハをバー状にへき開し、へき開面に反射保護膜15(図1の\\\)を形成した後、チップ状に素子を分離する。
本実施例の半導体光素子は、結晶成長工程でのドーパントの熱拡散に起因した半導体レーザの製造歩留りを飛躍的に向上させることができた。
また、上述した実施例では半導体レーザで説明したが、電界吸収型の変調器を集積したEA/DFB(Electro Absorption/Distributed FeedBack)レーザであっても良い。両者はともに半導体光素子である。
InGaAsP薄膜層16は、InGaAsP層6と屈折率が概ね等しければよい。また、InGaAsP薄膜層16は、p型InPクラッド層のドーパントが前記活性層の方向へ熱拡散することを抑制する拡散防止層といえる。上述した変形例は、本明細書の他の実施例でも適用できる。
エピタキシャル成長工程では、基板全体が約600℃に加熱されるため、p型InPクラッド層8からのドーパントの熱拡散が起こる。しかし、活性層上の全領域にドーパントの固溶濃度が高いInAlAs層19が存在するので、ドーパントの熱拡散量が回折格子の有無や開口幅に依存しない。この結果、安定した光出力、閾値電流、スロープ効率を得ることができる。
これらの工程を経た後、素子長が200μmとなるようにウェハをバー状にへき開し、へき開面に反射保護膜15を形成した後、チップ状に素子を分離する。
なお、活性層はInGaAsPでも他の材料であっても良い。InGaAsP薄膜層16は、拡散防止層でも、エッチング停止層でもある。
光モジュール300は、図示しない筐体を含む。筐体は、光ファイバの入力端とシリコン基板23に実装された光部品を収容する。
本実施例の光モジュールは、半導体レーザが高歩留りなので安価で作製することができた。
Claims (5)
- InP基板上に、下側ガイド層と、活性層と、上側ガイド層と、回折格子層のエッチング停止層と、前記回折格子層をパタニングしたInGaAsP回折格子層と、p型InPクラッド層とがこの順に形成された半導体光素子であって、
前記InGaAsP回折格子と前記p型InPクラッド層との間に前記p型InPクラッド層のドーパントが前記活性層の方向への熱拡散することを抑制する拡散防止層として、前記InGaAsP回折格子と同一組成のInGaAsP薄膜層を有することを特徴とする半導体光素子。 - 請求項1に記載の半導体光素子であって、
前記活性層はInGaAsPまたはInGaAlAsであることを特徴とする半導体光素子。 - InP基板上に、下側ガイド層と活性層と上側ガイド層とInPエッチング停止層とInGaAsP回折格子層とを成長するステップと、
導波路の形成部の前記InGaAsP回折格子層に回折格子を加工するステップと、
前記InGaAsP回折格子上に、p型InPクラッド層のドーパントが前記活性層の方向へ熱拡散することを抑制するための拡散防止層として前記InGaAsP回折格子と同一組成のInGaAsP薄膜層と、前記p型InPクラッド層とを成長するステップとを含む半導体光素子の製造方法。 - 請求項3に記載の半導体光素子の製造方法であって、
前記導波路の両側の前記p型InPクラッド層を、前記拡散防止層までエッチングするステップをさらに含む半導体光素子の製造方法。 - InP基板に、InAlAs下側ガイド層とInGaAlAs活性層とInAlAs上側ガイド層とInPエッチング停止層とInGaAsP回折格子層とを成長するステップと、
導波路の形成部の前記InGaAsP回折格子層にInGaAsP回折格子を加工するステップと、
前記InGaAsP回折格子上に、p型InPクラッド層のドーパントが前記活性層の方向への熱拡散することを抑制する拡散防止層として、前記InGaAsP回折格子と同一組成のInGaAsP薄膜層と、前記p型InPクラッド層とを成長するステップと、
前記導波路の両側の前記p型InPクラッド層を、前記拡散防止層までエッチングするステップとを含む半導体光素子の製造方法。
Priority Applications (3)
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JP2005074991A JP4638753B2 (ja) | 2005-03-16 | 2005-03-16 | 半導体光素子および半導体光素子の製造方法 |
US11/215,122 US20060222032A1 (en) | 2005-03-16 | 2005-08-31 | Optical semiconductor element, method of manufacturing optical semiconductor element and optical module |
KR1020050124710A KR100745918B1 (ko) | 2005-03-16 | 2005-12-16 | 반도체 광 소자, 반도체 광 소자의 제조 방법 및 광 모듈 |
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JP2005074991A JP4638753B2 (ja) | 2005-03-16 | 2005-03-16 | 半導体光素子および半導体光素子の製造方法 |
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JP2006261300A5 JP2006261300A5 (ja) | 2007-12-06 |
JP4638753B2 true JP4638753B2 (ja) | 2011-02-23 |
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JP4886634B2 (ja) * | 2007-08-31 | 2012-02-29 | 日本電信電話株式会社 | 量子井戸構造、光閉じ込め型量子井戸構造、半導体レーザ、分布帰還型半導体レーザ、及び量子井戸構造の製造方法 |
EP4122897A1 (en) | 2017-01-05 | 2023-01-25 | Magic Leap, Inc. | Patterning of high refractive index glasses by plasma etching |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0621570A (ja) * | 1992-07-06 | 1994-01-28 | Fujitsu Ltd | 半導体発光装置の製造方法 |
JPH07245447A (ja) * | 1994-03-07 | 1995-09-19 | Nec Corp | 半導体レーザ |
JP2003283047A (ja) * | 2002-03-26 | 2003-10-03 | Mitsubishi Electric Corp | リッジ導波路型分布帰還レーザ |
JP2004179274A (ja) * | 2002-11-26 | 2004-06-24 | Hitachi Ltd | 光半導体装置 |
JP2004311556A (ja) * | 2003-04-03 | 2004-11-04 | Hitachi Ltd | 半導体レーザ並びにそれを用いた光モジュール及び機能集積型レーザ |
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JP3842976B2 (ja) * | 2000-03-17 | 2006-11-08 | 富士通株式会社 | 分布帰還型半導体レーザとその製造方法 |
US6891870B2 (en) * | 2001-11-09 | 2005-05-10 | Corning Lasertron, Inc. | Distributed feedback laser for isolator-free operation |
KR100453814B1 (ko) * | 2002-02-07 | 2004-10-20 | 한국전자통신연구원 | 이종 회절격자를 가지는 반도체 광소자 및 그 제조 방법 |
JP4031263B2 (ja) * | 2002-03-05 | 2008-01-09 | 三菱電機株式会社 | 半導体レーザ装置の製造方法 |
JP4480948B2 (ja) * | 2002-07-15 | 2010-06-16 | 日本オプネクスト株式会社 | 半導体レーザ素子及びその製造方法 |
US7042921B2 (en) * | 2003-07-11 | 2006-05-09 | Emcore Corporation | Complex coupled single mode laser with dual active region |
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2005
- 2005-03-16 JP JP2005074991A patent/JP4638753B2/ja not_active Expired - Fee Related
- 2005-08-31 US US11/215,122 patent/US20060222032A1/en not_active Abandoned
- 2005-12-16 KR KR1020050124710A patent/KR100745918B1/ko active IP Right Grant
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0621570A (ja) * | 1992-07-06 | 1994-01-28 | Fujitsu Ltd | 半導体発光装置の製造方法 |
JPH07245447A (ja) * | 1994-03-07 | 1995-09-19 | Nec Corp | 半導体レーザ |
JP2003283047A (ja) * | 2002-03-26 | 2003-10-03 | Mitsubishi Electric Corp | リッジ導波路型分布帰還レーザ |
JP2004179274A (ja) * | 2002-11-26 | 2004-06-24 | Hitachi Ltd | 光半導体装置 |
JP2004311556A (ja) * | 2003-04-03 | 2004-11-04 | Hitachi Ltd | 半導体レーザ並びにそれを用いた光モジュール及び機能集積型レーザ |
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US20060222032A1 (en) | 2006-10-05 |
KR100745918B1 (ko) | 2007-08-02 |
KR20060101200A (ko) | 2006-09-22 |
JP2006261300A (ja) | 2006-09-28 |
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