JP7376837B2 - 半導体チップおよび光モジュール - Google Patents
半導体チップおよび光モジュール Download PDFInfo
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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
- H01S5/1003—Waveguide having a modified shape along the axis, e.g. branched, curved, tapered, voids
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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
- H01S5/1003—Waveguide having a modified shape along the axis, e.g. branched, curved, tapered, voids
- H01S5/101—Curved waveguide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
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- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
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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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- H01S5/00—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
- H01S5/1082—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 a special facet structure, e.g. structured, non planar, oblique
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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
- H01S5/1082—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 a special facet structure, e.g. structured, non planar, oblique
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- H01S5/02—Structural details or components not essential to laser action
- H01S5/0201—Separation of the wafer into individual elements, e.g. by dicing, cleaving, etching or directly during growth
- H01S5/0203—Etching
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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
- H01S5/12—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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- 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
- H01S5/16—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface
- H01S5/164—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface with window regions comprising semiconductor material with a wider bandgap than the active layer
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- H01S5/00—Semiconductor lasers
- H01S5/50—Amplifier structures not provided for in groups H01S5/02 - H01S5/30
Description
n1sinθ1=n2sinθ2
一般的なInP系の半導体チップの等価屈折率を3.2、出射側の媒質を空気(屈折率n2=1)とすると、曲げ導波路62の出射端面に対する入射角θ1が5°の場合、出射角度θ2は約16°となる。また、入射角θ1が7°の場合の出射角度θ2は約22°となる。
θwg=θ2-θ1
θf=θ2
ここで、θ1とθ2の関係はスネルの法則から導かれる。したがって、端面反射を十分抑制できる入射角θ1を設計すれば、導波路の曲げ角度θwgとエッチドファセットの角度θfは一意に決定される。
Claims (7)
- 光を出射する出力端部において、出射端面に対して離間した内部の位置に終端面を有する導波路と、
前記導波路の前記終端面と前記出射端面との間のバルク半導体からなる窓領域と、
前記出射端面がエッチングにより形成された側壁であるように、前記出力端部に形成された開口溝と、
前記開口溝に設けられ、前記出射端面から出射した光が入射するへき開面と、を備え、
前記導波路の前記終端面は前記光を前記終端面の垂線方向に非屈折にて前記窓領域へ出射する端面であり、
前記出射端面をなす前記窓領域の終端面は、前記へき開面の垂線方向と異なる方向の垂線を有し、かつ、前記窓領域の終端面の垂線方向からずれた入射角にて、前記窓領域を伝搬した前記光が入射し、前記入射角にて入射した前記光を前記へき開面の垂線方向へ屈折して出射する、ことを特徴とする半導体チップ。 - 前記導波路の前記終端面から前記出射端面に至る前記窓領域の長さLは、5μm<L<15μmであることを特徴とする請求項1に記載の半導体チップ。
- 前記導波路は、前記へき開面の垂線に対してθwgの角度をなす曲げ導波路であり、前記出射端面と前記へき開面とのなす角度がθ f であり、前記出射端面に対する光の前記入射角をθ1とし、前記出射端面において屈折され出射角θ2をもって前記開口溝に出射されるとき、
θwg=θ2-θ1
θf=θ2
を満たすことを特徴とする請求項1または2に記載の半導体チップ。 - 前記出射端面に対する光の前記入射角を表すθ1は、4°<θ1<8°であることを特徴とする請求項3に記載の半導体チップ。
- 電流注入により光利得を生じる多重量子井戸からなる活性層と回折格子を有するDFBレーザと、
前記DFBレーザとは異なる組成の多重量子井戸からなる吸収層を有するEA変調器と、
前記DFBレーザと同一組成の活性領域を有し、前記出力端部の前記導波路に接続された半導体光増幅器とをさらに備え、
同一基板上にモノリシックに集積されていることを特徴とする請求項1から4のいずれか1項に記載の半導体チップ。 - 前記DFBレーザ、前記EA変調器、および前記半導体光増幅器は、InP基板の(100)面上に形成され、前記DFBレーザの光軸が前記InP基板の結晶方位[011]または[01-1-]の方向であることを特徴とする請求項5に記載の半導体チップ。
- 請求項3または4に記載の半導体チップが、パッケージに実装されたことを特徴とする光モジュール。
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WO2023233525A1 (ja) * | 2022-05-31 | 2023-12-07 | 日本電信電話株式会社 | 光送信器 |
WO2024023940A1 (ja) * | 2022-07-26 | 2024-02-01 | 日本電信電話株式会社 | 光送信器 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001257421A (ja) | 2000-03-10 | 2001-09-21 | Oki Electric Ind Co Ltd | 半導体レーザ素子および製造方法 |
US20030026576A1 (en) | 2001-08-06 | 2003-02-06 | Asous Waleed A. | Reducing optical loss in semiconductor opto-electronic devices by hydrogen passivation of dopants |
JP2009246241A (ja) | 2008-03-31 | 2009-10-22 | Furukawa Electric Co Ltd:The | 半導体光素子および光モジュール |
US20140219305A1 (en) | 2013-02-07 | 2014-08-07 | Avago Technologies General Ip (Singapore) Pte. Ltd | Semiconductor lasers and etched-facet integrated devices having h-shaped windows |
JP2016018894A (ja) | 2014-07-08 | 2016-02-01 | 日本電信電話株式会社 | 集積半導体光素子 |
JP2019057539A (ja) | 2017-09-19 | 2019-04-11 | 日本電信電話株式会社 | 半導体光集積素子 |
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JP3535201B2 (ja) * | 1993-12-21 | 2004-06-07 | 三菱電機株式会社 | 半導体レーザ装置 |
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- 2020-08-20 US US18/040,763 patent/US20230283046A1/en active Pending
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001257421A (ja) | 2000-03-10 | 2001-09-21 | Oki Electric Ind Co Ltd | 半導体レーザ素子および製造方法 |
US20030026576A1 (en) | 2001-08-06 | 2003-02-06 | Asous Waleed A. | Reducing optical loss in semiconductor opto-electronic devices by hydrogen passivation of dopants |
JP2009246241A (ja) | 2008-03-31 | 2009-10-22 | Furukawa Electric Co Ltd:The | 半導体光素子および光モジュール |
US20140219305A1 (en) | 2013-02-07 | 2014-08-07 | Avago Technologies General Ip (Singapore) Pte. Ltd | Semiconductor lasers and etched-facet integrated devices having h-shaped windows |
JP2016018894A (ja) | 2014-07-08 | 2016-02-01 | 日本電信電話株式会社 | 集積半導体光素子 |
JP2019057539A (ja) | 2017-09-19 | 2019-04-11 | 日本電信電話株式会社 | 半導体光集積素子 |
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