JP4890472B2 - 温度無依存性アレイ導波路回折格子及び製作方法 - Google Patents
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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
- G02B6/12007—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 forming wavelength selective elements, e.g. multiplexer, demultiplexer
- G02B6/12009—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 forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides
- G02B6/12016—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 forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides characterised by the input or output waveguides, e.g. tapered waveguide ends, coupled together pairs of output waveguides
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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
- G02B6/12007—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 forming wavelength selective elements, e.g. multiplexer, demultiplexer
- G02B6/12009—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 forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides
- G02B6/12026—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 forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides characterised by means for reducing the temperature dependence
- G02B6/1203—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 forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides characterised by means for reducing the temperature dependence using mounting means, e.g. by using a combination of materials having different thermal expansion coefficients
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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
- G02B6/12007—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 forming wavelength selective elements, e.g. multiplexer, demultiplexer
- G02B6/12009—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 forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides
- G02B6/12033—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 forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides characterised by means for configuring the device, e.g. moveable element for wavelength tuning
-
- 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
- G02B2006/12035—Materials
- G02B2006/1204—Lithium niobate (LiNbO3)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
ns*d*sinφ+nc*ΔL=m*λ(式1)
ns:スラブ(slab)導波路の屈折率、d:アレイ導波路とスラブ導波路との界面での隣接したアレイ導波路間の距離、φ:回折角、nc:導波路の屈折率、ΔL:隣接したアレイ導波路間の長さの差、m:回折次数、λ:出力された光の波長。
λ0=nc*ΔL/m(式2)
dλ/dT=λ/nc*dnc/dT+λ/ΔL*dΔL/dT=λ/nc*dnc/dT+λ/αs(式3)
αs:基板の熱膨脹係数、前記(式3)の一項目であるλ/nc*nc/dTは導波路屈折率の温度依存性を表す。
dx/dλ=(LfΔL/nsdλ0)*ng(式4)
Lf:スラブ導波路の焦点の長さ、ng:アレイ導波路への群屈折率
前記(式4)において、温度変化をTとしたものを次に示す。
前記(式5)で分かるように、温度変化に従って出力導波路(2)に集光される光の波長が変わる場合、入力導波路(1)の位置を水平(x)方向に移動させれば波長の温度依存性を相殺させることができる。
温度変化が50°である場合、入力導波路を水平方向に14μm移動させれば波長変化を相殺できる。温度変化によって入力導波路の位置を受動的に変える方法では、基板より熱膨脹係数が大きい水平スライドロッド(10)を利用し、膨脹及び収縮時に水平スライドロッドと共に入力導波路(1)を水平(x)方向に動かす必要がある。
Lm=dx/dT*1/(CTEm−CTEs)(式7)
dx/dT:中心波長の変化を相殺するための温度による入力位置の変化率、CTEm:水平スライドロッド(10)の線形熱膨脹係数、CTEs:アライメント用基板(7)の線形熱膨脹係数。
Claims (14)
- 入力スラブ導波路、
前記入力スラブ導波路と同一平面基板上に形成されていると共に、前記入力スラブ導波路との界面が切断されることによって分離された入力導波路、
前記入力導波路が前記入力スラブ導波路と接続されつつ前記界面に沿ってスライディング可能になるように前記平面基板のうち前記入力導波路が位置した部分である素子のカットエレメントの上部に位置していると共に、
前記平面基板に別体に形成され、且つ、前記入力スラブ導波路に接続されたアレイ導波路の領域と重ならないように前記入力スラブ導波路が位置した部分である残り部分の下部に固定設置されたアライメント用基板、及び、
温度による膨脹収縮によって前記入力導波路位置を前記界面に沿ってスライディングさせ、温度による中心波長の変化を相殺させるために前記素子のカットエレメントの上部と前記アライメント用基板の上部に各々接着固定された移動部資材を含み、
前記入力導波路が位置した素子の前記カットエレメントが、前記アライメント用基板の上面に密着された状態で温度変化に従って自由な移動が可能になるように結合されており、AWGの主部を伴う残りのカットエレメントが接着剤で前記アライメント用基板に固定されていることを特徴とするアレイ導波路回折格子。 - アライメント用基板が、前記平面基板と同じ材質であるか、又は、熱膨脹係数が前記平面基板とほとんど同じ材質であることを特徴とする請求項1に記載のアレイ導波路回折格子。
- 前記入力導波路が位置した素子の前記カットエレメントとアライメント用基板との間隙にゲルを満たしてその粘着性によって前記アライメント用基板の表面に垂直であるy方向整列の乱れ(misalignment)を阻み、ゲルの流動性によって前記カットエレメントの水平方向への移動を自由とし、水分がすき間に入り込まないようにして低温高湿環境でも安定的な動作をすることを特徴とする請求項1に記載のアレイ導波路回折格子。
- 前記素子の前記カットエレメントとの粘着面積を減らすため前記アライメント用基板の表面に溝が形成された構造を持つことを特徴とする請求項1又は3に記載のアレイ導波路回折格子。
- 溝の位置が、アライメント用基板の上部又は入力導波路に接続された前記カットエレメントの下部であることを特徴とする請求項4に記載のアレイ導波路回折格子。
- 二つのカットエレメントにおいて、調整された切断面の間隔の維持及び再配置時の衝突による破損防止のために、切断面の間に2〜30μmの薄いフィルムを挿入した構造を持つことを特徴とする請求項1に記載のアレイ導波路回折格子。
- 挿入されたフィルムによって形成及び維持される間隔に、透明なゲルを満たして接続損失を減らすだけではなく、隙間から流出することがないよう保持し、さらに、入力導波路に接続された前記カットエレメントの移動を自由にすることを特徴とする請求項6に記載のアレイ導波路回折格子。
- 間隔に満たされたゲルが、光透過率の高い、初期塗布する時1μm以下の間隔にも塗布しやすい粘度が10,000cps以下のもので、且つ、塗布後には硬化する流動性のないものであり、また硬化後のショア硬度値が30以下で零下30度の低温でも柔軟性があって400%以上の引張率を持つことを特徴とする請求項3又は7に記載のアレイ導波路回折格子。
- 入力導波路の位置を変動させる移動部資材が、温度によって膨脹収縮する棒部分と、棒部分を前記入力導波路が位置した部分である素子のカットエレメント及びアライメント基板と結合させる固定部分とで構成されることを特徴とする請求項1に記載のアレイ導波路回折格子。
- 膨脹収縮する棒部分には基板より熱膨脹係数が大きい材料を使い、固定部分では整列を維持したまま基板との迅速な組立を可能にするために紫外線透過率が良いボロシリケートガラス又は石英ガラスを使うことを特徴とする請求項9に記載のアレイ導波路回折格子。
- 膨脹収縮する長さと力を正確に伝達するために、膨脹収縮する棒の両端断面をガラス固定部分の側面に接着固定することを特徴とする請求項10に記載のアレイ導波路回折格子。
- 切断した素子が接続時素子切断面下部が割れることをあらかじめ防止し、もし割れが発生してもすき間に流入されないようにするために切断面接続地点の下のアライメント用基板に溝を持つことを特徴とする請求項1に記載のアレイ導波路回折格子。
- 切断された入力導波路を除いた残りの素子部分がアライメント用基板の上に固定される時、すき間に塗布した接着剤が接続地点外に流れ出ないようにするために接続地点内側方向に流れ防止用溝を持つことを特徴とする請求項1に記載のアレイ導波路回折格子。
- AWGチップが2つのエレメントにカットされる前に、入力導波路と出力導波路に光ファイバ又は光ファイバブロックを結合(pigtailing)することを特徴とする請求項1に記載のアレイ導波路回折格子の製造方法。
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KR10-2005-0001583 | 2005-01-07 | ||
KR1020050001583A KR100763790B1 (ko) | 2005-01-07 | 2005-01-07 | 온도 무의존성 광도파로열 격자 및 그 제작방법 |
PCT/KR2005/002050 WO2006073229A1 (en) | 2005-01-07 | 2005-06-30 | Packaging method of temperature insensitive arrayed waveguide grating |
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JP4890472B2 true JP4890472B2 (ja) | 2012-03-07 |
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JP (1) | JP4890472B2 (ja) |
KR (1) | KR100763790B1 (ja) |
CN (1) | CN101099098B (ja) |
WO (1) | WO2006073229A1 (ja) |
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KR100841223B1 (ko) | 2006-02-28 | 2008-06-26 | (주)포인테크 | 광특성 보상을 위한 온도무의존 광도파로열 격자회로 소자및 그 제작 방법 |
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CN107490823B (zh) * | 2017-08-30 | 2019-11-08 | 武汉光迅科技股份有限公司 | 一种实现阵列波导光栅双线性温度补偿装置及方法 |
KR101885498B1 (ko) * | 2018-01-24 | 2018-08-03 | 주식회사 폴스랩 | 정밀한 평행운동 모듈을 이용한 온도 무의존성 어레이도파로 회절격자 및 그 제작 방법 |
CN108594363B (zh) * | 2018-03-30 | 2020-02-14 | 武汉光迅科技股份有限公司 | 一种阵列波导光栅及光模块 |
CN110515155A (zh) * | 2019-08-29 | 2019-11-29 | 易锐光电科技(安徽)有限公司 | 一种波长可控阵列波导光栅 |
CN114205990B (zh) * | 2020-09-17 | 2024-03-22 | 深南电路股份有限公司 | 线路板及其制备方法 |
CN113703092A (zh) * | 2021-07-02 | 2021-11-26 | 浙江大学 | 一种温度不敏感的平场型阵列波导光栅路由器 |
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- 2005-06-30 WO PCT/KR2005/002050 patent/WO2006073229A1/en active Application Filing
- 2005-06-30 CN CN200580046275.8A patent/CN101099098B/zh active Active
- 2005-06-30 US US11/794,767 patent/US7912330B2/en active Active
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JP2001188141A (ja) * | 1999-10-21 | 2001-07-10 | Furukawa Electric Co Ltd:The | 光導波回路モジュール |
JP2002006158A (ja) * | 2000-06-27 | 2002-01-09 | Sumitomo Electric Ind Ltd | 光合分波装置 |
US20030128932A1 (en) * | 2002-01-04 | 2003-07-10 | Jds Uniphase Corporation | Athermal optical coupler |
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CN101099098A (zh) | 2008-01-02 |
US7912330B2 (en) | 2011-03-22 |
CN101099098B (zh) | 2010-10-13 |
JP2008538820A (ja) | 2008-11-06 |
KR20050010076A (ko) | 2005-01-26 |
WO2006073229A1 (en) | 2006-07-13 |
US20080135169A1 (en) | 2008-06-12 |
KR100763790B1 (ko) | 2007-10-08 |
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