JP6033902B2 - レーザー光源 - Google Patents
レーザー光源 Download PDFInfo
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- JP6033902B2 JP6033902B2 JP2015026613A JP2015026613A JP6033902B2 JP 6033902 B2 JP6033902 B2 JP 6033902B2 JP 2015026613 A JP2015026613 A JP 2015026613A JP 2015026613 A JP2015026613 A JP 2015026613A JP 6033902 B2 JP6033902 B2 JP 6033902B2
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- filter element
- light source
- laser light
- semiconductor layer
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Images
Classifications
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- H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
- H01S5/0078—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for frequency filtering
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- H01S5/00—Semiconductor lasers
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- H01S5/00—Semiconductor lasers
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- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
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- 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
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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
- H01S5/1078—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 with means to control the spontaneous emission, e.g. reducing or reinjection
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- H01S5/00—Semiconductor lasers
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- H01S5/00—Semiconductor lasers
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- 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
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- H01S2301/00—Functional characteristics
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- 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
- H01S5/11—Comprising a photonic bandgap structure
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Description
半導体層列と、
フィルタ構造部とを含み、
前記半導体層列は、活性領域とビーム出力結合面を備え、前記ビーム出力結合面は第1の部分領域と、該第1の部分領域とは異なる第2の部分領域を有し、
前記活性領域は、動作モード中に、第1の波長領域のコヒーレントな第1の電磁ビームと、第2の波長領域のインコヒーレントな第2の電磁ビームとを発生し、
前記第2の波長領域は第1の波長領域を含んでおり、
前記コヒーレントな第1の電磁ビームは、第1の部分領域から放射方向に沿って放射され、
前記インコヒーレントな第2の電磁ビームは、第1の部分領域と第2の部分領域から放射され、
前記フィルタ構造部は、活性領域から放射されたインコヒーレントな第2の電磁ビームを放射方向に沿って少なくとも部分的に減衰するように構成されている。
2 電極
3 電極
4 機能層
5 フィルタ構造部
6 第1のフィルタ素子
8 第3のフィルタ素子
10 半導体層列
11 リッジ構造部
12 ビーム出力結合面
40 活性層
45 活性領域
51 コヒーレントな第1の電磁ビーム
52 インコヒーレントな第2の電磁ビーム
90 放射方向
121 第1の部分領域
122 第2の部分領域
Claims (26)
- 半導体層列(10)と、
フィルタ構造部(5)とを含み、
前記半導体層列(10)は、活性領域(45)とビーム出力結合面(12)とを備え、
前記ビーム出力結合面(12)は、第1の部分領域(121)と、該第1の部分領域とは異なる第2の部分領域(122)とを有している、レーザー光源において、
前記活性領域(45)は、動作モード中に、第1の波長領域のコヒーレントな第1の電磁ビーム(51)と、第2の波長領域のインコヒーレントな第2の電磁ビーム(52)とを生成し、
前記コヒーレントな第1の電磁ビーム(51)は、第1の部分領域(121)から放射方向(90)に沿って放射され、
前記インコヒーレントな第2の電磁ビーム(52)は、第1の部分領域(121)と第2の部分領域(122)から放射され、
前記第2の波長領域は前記第1の波長領域を含んでおり、
前記フィルタ構造部(5)は、前記活性領域から放射されたインコヒーレントな第2の電磁ビーム(52)を、前記放射方向(90)に沿って少なくとも部分的に減衰し、
前記フィルタ構造部(5)は、放射方向(90)で見て前記半導体層列(10)の後方に配置された少なくとも1つの第1のフィルタ素子(6)を含み、
前記少なくとも1つの第1のフィルタ素子(6)は、電磁波ビームに対して角度依存性及び/又は波長依存性の透過性(61)を有しており、
前記少なくとも1つの第1のフィルタ素子(6)の前記透過性(61)は、前記放射方向(90)に対する角度(91)の増加と共に、及び/又は、前記第1の波長領域からの偏差の増加と共に、減衰し、
前記少なくとも1つの第1のフィルタ素子(6)は、ブラッグミラーを含み、
前記ブラッグミラーは、大域的な主要最大値と少なくとも1つの局所的な極大値とを有する波長依存性の反射性を有し、
前記局所的な極大値は、前記第1の波長領域にあるように構成されていることを特徴とするレーザー光源。 - 前記少なくとも1つの第1のフィルタ素子(6)は、エタロンかまたは光学的バンドエッジフィルタを含んでいる、請求項1記載のレーザー光源。
- 前記半導体層列は、分布帰還型レーザーとして構成されている、請求項1または2記載のレーザー光源。
- 前記少なくとも1つの第1のフィルタ素子(6)は、電磁ビームに対して非透過性の材料を有する少なくとも1つの層を有し、
前記非透過性の材料は、少なくとも部分的に前記第2の部分領域(122)に配置されている、請求項1または2記載のレーザー光源。 - 前記少なくとも1つの層は、開口部を備えた孔部絞りとして構成されており、
前記開口部は、前記第1の部分領域(121)上に配置されている、請求項4記載のレーザー光源。 - 前記フィルタ構造部(5)は、少なくとも1つの第2のフィルタ素子(7)を含み、該第2のフィルタ素子(7)は、前記半導体層列(10)の前記ビーム出力結合面(12)とは反対側の表面(13)に配置されている、請求項1または2記載のレーザー光源。
- 前記少なくとも1つの第2のフィルタ素子(7)は、電磁ビームに対して角度依存性の透過性(61)を有し、
前記第2のフィルタ素子(7)の透過性(61)は、前記放射方向(90)に対する角度(91)の増加と共に増加している、請求項6記載のレーザー光源。 - 前記少なくとも1つの第2のフィルタ素子(7)は、ブラッグミラーを含んでいる、請求項6記載のレーザー光源。
- 前記フィルタ構造部(5)は、活性領域(45)が配置されている、コヒーレントな第1の電磁ビーム(51)に対する光共振器の少なくとも一部を形成している、請求項1または2記載のレーザー光源。
- 前記フィルタ構造部(5)は、少なくとも1つの第4のフィルタ素子(9)を有し、該第4のフィルタ素子は、前記半導体層列(10)における放射方向(90)に対して平行な延在方向を有する面に配置されている、請求項1または2記載のレーザー光源。
- 前記半導体層列(10)は、複数の層を有し、該複数の層のうちの1つの境界面が前記面である、請求項10記載のレーザー光源。
- 前記少なくとも1つの第4のフィルタ素子(9)は、前記半導体層列(10)の複数の層のうちの2つの層の間に配置されている、請求項10記載のレーザー光源。
- 前記少なくとも1つの第4のフィルタ素子(9)は、前記半導体層列(10)の外被層(5)として形成されている、請求項12記載のレーザー光源。
- 前記面は、前記半導体層列(10)におけるビーム出力結合面(12)とは異なる表面(14)である、請求項10記載のレーザー光源。
- 前記面は、前記半導体層列(10)の側面である、請求項14記載のレーザー光源。
- 前記少なくとも1つの第4のフィルタ素子(9)は、非透過性材料を備えた少なくとも1つの層を含んでいる、請求項10記載のレーザー光源。
- 前記少なくとも1つの第4のフィルタ素子(9)は、表面構造部を含んでいる、請求項10記載のレーザー光源。
- 前記半導体層列(10)は成長方向を有しており、表面構造部を備えた表面が、前記成長方向に対して垂直方向に配置されており、さらに前記表面構造部は活性領域(45)に対して横方向にずらされて配置されている、請求項17記載のレーザー光源。
- 前記表面構造部は、少なくとも1つの凹部若しくは凸部を有している、請求項17記載のレーザー光源。
- 前記表面構造部を備えた表面は、活性領域に向いた側か若しくは活性領域とは反対側の、基板(1)表面であるかまたは活性領域に向いた側若しくは活性領域とは反対側の、半導体層列(10)の電気的コンタクト層(2)の表面である、請求項19記載のレーザー光源。
- 前記少なくとも1つの凹部は、トレンチとして形成されている、請求項19記載のレーザー光源。
- 前記トレンチは、延在方向を有しており、前記延在方向は、放射方向(90)と共に0°以上かつ90°以下の角度を形成している、請求項21記載のレーザー光源。
- 前記表面構造部は、少なくとも部分的に非透過性材料で覆われる、請求項17記載のレーザー光源。
- 前記半導体層列(10)は、2つの導波路層(42,43)を有し、該2つの導波路層(42,43)の間に活性領域(45)が設けられており、さらに表面構造部が表面から前記導波路層のうちの少なくとも1つ(43)へ延在している、請求項17記載のレーザー光源。
- 前記半導体層列(10)は、エッジ発光型半導体レーザーとして構成されている、請求項1または2記載のレーザー光源。
- 前記半導体層列(10)は、垂直発光型半導体レーザーとして構成されている、請求項1または2記載のレーザー光源。
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US20110188530A1 (en) | 2011-08-04 |
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KR101600633B1 (ko) | 2016-03-07 |
CN103107481A (zh) | 2013-05-15 |
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US9531158B2 (en) | 2016-12-27 |
US9407063B2 (en) | 2016-08-02 |
US8369370B2 (en) | 2013-02-05 |
KR20150017774A (ko) | 2015-02-17 |
US20130148683A1 (en) | 2013-06-13 |
KR101668218B1 (ko) | 2016-10-20 |
US9559496B2 (en) | 2017-01-31 |
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US9559497B2 (en) | 2017-01-31 |
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