JP6579488B2 - 面発光レーザ、面発光レーザアレイ、レーザ装置、点火装置及び内燃機関 - Google Patents
面発光レーザ、面発光レーザアレイ、レーザ装置、点火装置及び内燃機関 Download PDFInfo
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- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
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- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094049—Guiding of the pump light
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- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
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- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
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- 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
- H01S5/18—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities
- H01S5/183—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
- H01S5/18308—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL] having a special structure for lateral current or light confinement
- H01S5/18311—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL] having a special structure for lateral current or light confinement using selective oxidation
- H01S5/18313—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL] having a special structure for lateral current or light confinement using selective oxidation by oxidizing at least one of the DBR layers
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- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/32—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures
- H01S5/3202—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures grown on specifically orientated substrates, or using orientation dependent growth
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- 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
- H01S5/34353—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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Description
以下、本発明の一実施形態を図面を用いて説明する。図1には、一実施形態に係る内燃機関としてのエンジン300の主要部が模式図的に示されている。
(1)燃料噴出機構302が、燃料と空気の可燃性混合気を燃焼室304内に噴出させる(吸気)。
(2)ピストン305が上昇し、可燃性混合気を圧縮する(圧縮)。
(3)点火装置301が、燃焼室304内にレーザ光を射出する。これにより、燃料に点火される(着火)。
(4)燃焼ガスが発生し、ピストン305が降下する(燃焼)。
(5)排気機構303が、燃焼ガスを燃焼室304外へ排気する(排気)。
次に、面発光レーザアレイ201の各発光部(面発光レーザ)の詳細について図4(A)及び図4(B)を用いて説明する。なお、図4(B)は、図4(A)のA−A断面図である。
一例として図14(A)及び図14(B)にレーザ装置としてのレーザアニール装置1000の概略構成が示されている。このレーザアニール装置1000は、光源1010、光学系1020、テーブル装置1030、及び不図示の制御装置などを備えている。
一例として図15にレーザ装置としてのレーザ加工機3000の概略構成が示されている。このレーザ加工機3000は、光源3010、光学系3100、対象物Pが載置されるテーブル3150、テーブル駆動装置3160、操作パネル3180及び制御装置3200などを備えている。
Claims (13)
- スペーサ層で挟まれた活性層を含む複数の半導体層が積層されている面発光レーザにおいて、
前記活性層は、(AlxGa1−x)yIn1−yAs(0≦x<1、0≦y<1)からなる第1の層と、(AlmGa1−m)nIn1−nAs(0≦m<1、0≦n<1、但し、m≠x及びn≠yの少なくとも一方を満たす。)からなる第2の層を有し、
前記スペーサ層は、(AlaGa1−a)bIn1−bP(0≦a<1、0≦b<1)からなる面発光レーザ。 - 前記第1の層は量子井戸層であり、前記第2の層は障壁層であることを特徴とする請求項1に記載の面発光レーザ。
- 発振波長が808nmであることを特徴とする請求項1又は2に記載の面発光レーザ。
- 前記複数の半導体層は基板上に積層され、
前記基板は、GaAsからなることを特徴とする請求項1〜3のいずれか一項に記載の面発光レーザ。 - 前記複数の半導体層は基板上に積層され、
前記基板は、表面の法線方向が、結晶方位<1 0 0>の一の方向に対して、結晶方位<1 1 1>の一の方向に向かって傾斜していることを特徴とする請求項1〜4のいずれか一項に記載の面発光レーザ。 - 請求項1〜5のいずれか一項に記載の面発光レーザを複数含む面発光レーザアレイ。
- 対象物にレーザ光を照射するレーザ装置であって、
請求項6に記載の面発光レーザアレイと、
前記面発光レーザアレイから射出されるレーザ光を前記対象物に導光する光学系と、を備えるレーザ装置。 - 請求項6に記載の面発光レーザアレイと、
前記面発光レーザアレイから射出されるレーザ光を集光する光学系と、
前記光学系を介したレーザ光を伝送する伝送部材と、を備えるレーザ装置。 - 請求項6に記載の面発光レーザアレイと、
前記面発光レーザアレイからのレーザ光が入射されるレーザ共振器と、を備えるレーザ装置。 - 前記レーザ共振器は、Qスイッチレーザであることを特徴とする請求項9に記載のレーザ装置。
- 前記レーザ共振器は、レーザ媒質及び可飽和吸収体を含むことを特徴とする請求項10に記載のレーザ装置。
- 請求項9〜11のいずれか一項に記載のレーザ装置と、
前記レーザ装置から射出されるレーザ光を集光する光学系と、を備える点火装置。 - 燃料を燃焼させて燃焼ガスを生成する内燃機関において、
前記燃料に点火するための請求項12に記載の点火装置を備えていることを特徴とする内燃機関。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16159460.1A EP3070790B1 (en) | 2015-03-16 | 2016-03-09 | Surface-emitting laser, surface-emitting laser array, laser apparatus, ignition device and internal combustion engine |
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| JP2015051565 | 2015-03-16 | ||
| JP2015051565 | 2015-03-16 |
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| JP2016174137A JP2016174137A (ja) | 2016-09-29 |
| JP6579488B2 true JP6579488B2 (ja) | 2019-09-25 |
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| FI3386041T3 (fi) | 2015-12-02 | 2023-06-02 | Ricoh Co Ltd | Laserlaite, sytytyslaite ja polttomoottori |
| JP6662013B2 (ja) | 2015-12-11 | 2020-03-11 | 株式会社リコー | 面発光レーザ、面発光レーザアレイ、レーザ装置、点火装置、内燃機関、光走査装置、画像形成装置、光伝送モジュール、及び光伝送システム |
| WO2018025294A1 (ja) * | 2016-08-05 | 2018-02-08 | 株式会社 東芝 | ガスタービン燃焼器 |
| EP3366914A3 (en) | 2017-02-06 | 2019-01-02 | Ricoh Company Ltd. | Laser device and internal combustion engine |
| EP3376021B1 (en) | 2017-03-16 | 2022-05-04 | Ricoh Company, Ltd. | Laser device and internal combustion engine |
| JP6889878B2 (ja) | 2017-03-17 | 2021-06-18 | 株式会社リコー | 駆動回路及び発光装置 |
| JP7434849B2 (ja) | 2019-11-29 | 2024-02-21 | 株式会社リコー | 面発光レーザ、面発光レーザ装置、光源装置及び検出装置 |
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| WO1998048221A2 (en) * | 1997-04-21 | 1998-10-29 | The Regents Of The University Of California | Laser ignition |
| US6351579B1 (en) * | 1998-02-27 | 2002-02-26 | The Regents Of The University Of California | Optical fiber switch |
| JP5057354B2 (ja) * | 2004-04-30 | 2012-10-24 | 株式会社リコー | 面発光レーザの製造方法 |
| EP1780849B1 (en) * | 2004-06-11 | 2013-01-30 | Ricoh Company, Ltd. | Surface emitting laser diode and its manufacturing method |
| JP4461980B2 (ja) * | 2004-09-22 | 2010-05-12 | 住友電気工業株式会社 | 半導体光素子 |
| JP2007173393A (ja) * | 2005-12-20 | 2007-07-05 | Denso Corp | レーザ装置 |
| JP2012190872A (ja) * | 2011-03-09 | 2012-10-04 | Ricoh Co Ltd | 面発光レーザ素子の製造方法、光走査装置及び画像形成装置 |
| CN103563190A (zh) * | 2011-03-17 | 2014-02-05 | 菲尼萨公司 | 陷阱减少的具有高铟低铝量子阱和高铝低铟势垒层的激光器 |
| JP6245629B2 (ja) * | 2013-03-26 | 2017-12-13 | 大学共同利用機関法人自然科学研究機構 | 半導体レーザー励起固体レーザー装置を利用する車載式点火装置 |
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2015
- 2015-08-26 JP JP2015166740A patent/JP6579488B2/ja active Active
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