Wavelength variable semiconductor laser

波長可変半導体レーザ

Abstract

【課題】構成部品数を従来よりも増やすことなく、発振波長を変化させる際のモードホッピングを解消し、従来よりも幅広い範囲で、発振波長を変化させること。 【解決手段】活性領域14と、光導波路16と、光導波路の光伝播方向に沿う側面を活性領域と対向させて光導波路と活性領域とを光結合する光結合部30と、光結合部を挟んで活性領域と対向して設けられていて光導波路を含む光偏向部20と、光導波路に対して、活性領域を挟んで配置されていて、光導波路から入射された光を波長選択された戻り光として光導波路へ帰還させる反射型回折格子18と、光導波路の、光伝播方向と直交する光出射端面22に設けられていて、反射型回折格子と相俟って光共振器を構成する反射面24とを備え、光偏向部は、光導波路から反射型回折格子に向かう光の出射角を変えることによって、反射型回折格子への入射角と光路の長さとを変更することを特徴とする。 【選択図】図1
<P>PROBLEM TO BE SOLVED: To cancel mode hopping when changing an oscillation wavelength without increasing the number of component parts as compared with before, and to change the oscillation wavelength in a wider range as compared with before. <P>SOLUTION: A wavelength variable semiconductor laser comprises an active region 14; an optical waveguide 16; an optical coupling section 30 for optically coupling the optical waveguide to the active region by allowing a side along the optical propagation direction of the optical waveguide to the active region; a light deflection section 20 that sandwiches the optical coupling section, is provided opposite to the active region, and includes the optical waveguide; a reflection diffraction grating 18 that sandwiches the active region for arrangement to the optical waveguide, and feeding light entering from the optical waveguide back to the optical waveguide as wavelength-selected return light; and a reflection surface 24 that is provided on a light emission end face 22 orthogonally crossing the light propagation direction of the light waveguide, and composes an optical resonator combined with the reflection diffraction grating. At the light deflection section, the emission angle of light toward the reflection diffraction grating from the optical waveguide is changed, thus changing the incidence angle to the reflection diffraction grating and the length of an optical path. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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Patent Citations (6)

    Publication numberPublication dateAssigneeTitle
    JP-2000164981-AJune 16, 2000Anritsu Corp, アンリツ株式会社波長可変光源
    JP-2000353854-ADecember 19, 2000Ando Electric Co Ltd, 安藤電気株式会社外部共振器型波長可変光源
    JP-H042190-AJanuary 07, 1992Nec CorpMode-locked semiconductor laser
    JP-H0686362-UDecember 13, 1994安藤電気株式会社シングルモードの連続発振レーザの外部共振器構造
    JP-H0818167-AJanuary 19, 1996Anritsu Corp, アンリツ株式会社可変波長光源装置
    JP-H09186408-AJuly 15, 1997Canon Inc, キヤノン株式会社Distributed reflector semiconductor laser

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