JP2016174136A - 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
面発光レーザアレイ、レーザ装置、点火装置、及び内燃機関 Download PDFInfo
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Abstract
【解決手段】 面発光レーザアレイは複数の発光部を有し、各発光部が、基板101上に順次積層された下部半導体DBR103、活性層105、上部半導体DBR107、レーザ光の射出領域を取り囲む上部電極113などを有している。下部半導体DBR103は、AlxGa(1−x)As(0.95<x≦1)を含み、上部電極113は、厚さが2μm以上であり、複数の発光部における発光部間の領域も被覆している。
【選択図】図4
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の詳細について図4を用いて説明する。なお、図4は、面発光レーザアレイ201の一部のYZ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)
- 複数の発光部を有する面発光レーザアレイであって、
各発光部は、反射鏡と、活性層と、レーザ光の射出領域を取り囲む電極とを含み、
前記反射鏡は、AlxGa(1−x)As(0.95<x≦1)を含み、
前記電極は、前記複数の発光部における発光部間の領域も被覆している面発光レーザアレイ。 - 前記電極は、厚さが2μm以上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アレイ。
- 前記複数の発光部はメサ構造を有し、
前記電極の上面の高さは、前記メサ構造の高さ以上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アレイ。 - 前記反射鏡は、AlAsを含む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アレイ。
- 前記複数の発光部における発光部間の領域は、最表層がInを含む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アレイ。
- 前記反射鏡は、多層膜の反射鏡であり、レーザ光の発振波長をλ、自然数をmとしたとき、光学的厚さが(2m+1)λ/4のAlAs層を少なくとも1層含むことを特徴とする請求項1〜5のいずれか一項に記載の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1〜6のいずれか一項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1〜6のいずれか一項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1〜6のいずれか一項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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