JP6275841B2 - 非対称光導波路格子共振器及びdbrレーザ - Google Patents
非対称光導波路格子共振器及びdbrレーザ Download PDFInfo
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Description
Claims (17)
- 光導波路であって、前記光導波路の長手方向長さに沿って基板から延びる複数の側壁によって画定される横断方向の導波路幅を有する、光導波路と、
前方格子長に沿って前記光導波路内に配置される前方回折格子セクションと、
後方格子長に沿って前記光導波路内に配置される後方回折格子セクションと、を備え、
前記前方回折格子セクション及び前記後方回折格子セクションの少なくとも一方は、第1波形構造体及び第2波形構造体を更に有し、前記第1波形構造体は、前記横断方向の導波路幅の一部によって前記第2波形構造体から横方向に隔てられ、
前記第1波形構造体を前記第2波形構造体から隔てる前記光導波路の中央部分の幅は、前記前方格子長にわたって変化し、又は前記前方格子長と前記後方格子長との間で変化する、
レーザダイオード。 - 前記後方回折格子セクションの強度は、前記前方回折格子セクションの強度より大きい、
請求項1に記載のレーザダイオード。 - 前記前方格子長は、前記後方格子長より長い、請求項2に記載のレーザダイオード。
- 前記前方回折格子セクション内の前記光導波路の有効屈折率は、前記後方回折格子セクション内の前記光導波路の有効屈折率におよそ等しい、請求項2又は3に記載のレーザダイオード。
- 前記前方回折格子セクションは、一定周期及びデューティサイクルを有する複数の第1波形構造体、及び前記一定周期及び前記デューティサイクルを有する複数の第2波形構造体の第1の組を有し、
前記後方回折格子セクションは、前記一定周期及び前記デューティサイクルを有する複数の第1波形構造体、及び前記一定周期及び前記デューティサイクルを有する複数の第2波形構造体の第2の組を有する、
請求項1から4の何れか一項に記載のレーザダイオード。 - 前記光導波路は、第1の材料を含み、
前記第1波形構造体及び前記第2波形構造体は、前記第1の材料内に組み込まれる第2の材料を含む、請求項1から5の何れか一項に記載のレーザダイオード。 - 前記第2の材料は、前記第1波形構造体及び前記第2波形構造体を横方向に隔てる前記光導波路の領域内の前記第1の材料の高さより小さい前記光導波路の深さまで組み込まれる、請求項6に記載のレーザダイオード。
- 前記第2の材料は、前記光導波路の前記複数の側壁を横断する、請求項6又は7に記載のレーザダイオード。
- 前記前方格子長に沿った前記光導波路は、前記後方格子長に沿った第2の幅より小さい第1の幅を有する、請求項1から8の何れか一項に記載のレーザダイオード。
- 前記前方回折格子セクションと前記後方回折格子セクションとの間のアポダイズ格子セクションを更に備え、
前記アポダイズ格子セクション内の前記光導波路の幅は、前記第1の幅から前記第2の幅に変化し、
前記第1の幅は、前記前方回折格子セクションと前記後方回折格子セクションとの間で前記光導波路の有効屈折率を一致させるのに十分である量だけ前記第2の幅より小さい、請求項9に記載のレーザダイオード。 - 前記光導波路は、シリコン及びIII−V族半導体を含むハイブリッド導波路であり、
前記前方回折格子セクション及び前記後方回折格子セクションは、前記ハイブリッド導波路のエバネセント領域内にあり、
前記前方回折格子セクションは、前記後方回折格子セクションより、1/4波長関数だけ位相変化させられている、請求項1から10の何れか一項に記載のレーザダイオード。 - フォトニック集積回路(PIC)であって
請求項1から11の何れか一項に記載の前記レーザダイオードと、
前記基板の上方に配置され、前記光導波路によって前記前方回折格子セクションを通って前記レーザダイオードに光学的に結合される1又は複数の光波長合分波器(WDM)又は光変調器を備える
PIC。 - プロセッサと、
メモリと、
前記プロセッサ及び前記メモリのうちの少なくとも1つに通信可能に結合される光受信モジュールチップとを備え、前記光受信モジュールチップは請求項12に記載の前記PICをさらに備える
電子デバイス。 - 光導波路であって、前記光導波路の長手方向長さに沿って基板から延び、前記光導波路の横断方向幅で隔てられる対向する複数の側壁を有する、光導波路と、
前記長手方向長さに沿って前記光導波路内に配置される非対称共振格子であって、前記非対称共振格子は、第1の格子長に沿った第1の格子強度と、前記第1の格子長より短い第2の格子長に沿った、前記第1の格子強度より高い第2の格子強度とを有する、非対称共振格子とを備え、
前記第1の格子長内の前記光導波路の有効屈折率は、前記第2の格子長内の前記光導波路の有効屈折率におよそ等しく、
前記第1の格子長及び前記第2の格子長の少なくとも一方は、第1波形構造体及び第2波形構造体を更に有し、前記第1波形構造体は、前記光導波路の横断方向幅の一部によって前記第2波形構造体から横方向に隔てられ、
前記第1波形構造体を前記第2波形構造体から隔てる前記光導波路の中央部分の幅は、前記第1の格子長にわたって変化し、又は前記第1の格子長と前記第2の格子長との間で変化する、
モノリシック非対称光導波路格子共振器。 - 前記第1の格子長に沿った前記光導波路は、前記第2の格子長に沿った第2の幅より小さい第1の幅を有し、
前記非対称共振格子は、前記第1の格子長と前記第2の格子長との間にアポダイズ格子長をさらに含み、
前記光導波路の横断方向幅は、前記アポダイズ格子長内で前記第1の幅から前記第2の幅へと変化する、
請求項14に記載のモノリシック非対称光導波路格子共振器。 - ハイブリッドシリコン非対称分布帰還型(DFB)レーザダイオードを製造する方法であって、
誘電体材料層の上方に配置されるシリコン半導体のデバイス層を有する基板を受容する段階と、
光導波路の中に前記デバイス層をパターニングする段階であって、前記光導波路は、前記基板から延びる複数の側壁を有し、前記光導波路の長手方向長さに沿った前記光導波路の横断方向幅を画定する、段階と、
前記光導波路の第1の部分に沿って第1の回折格子を、及び前記光導波路の第2の部分に沿って第2の回折格子を形成する段階であって、前記第2の回折格子は、前記第1の回折格子より強く、前記第1の回折格子は、前記第2の回折格子より前記光導波路の長い長手方向長さを占有する、段階と、
前記第1の回折格子及び前記第2の回折格子に隣接し、前記第1の回折格子と前記第2の回折格子との間に延びるIII−V族化合物半導体を配置する段階とを備え、
前記第1の回折格子及び前記第2の回折格子のうち少なくとも1つを形成する段階は、第1の一対の開口を前記デバイス層の中にエッチングする段階をさらに有し、前記第1の一対の開口のそれぞれは、前記光導波路の中央領域で互いに隔てられ、
前記光導波路の中央領域の幅は、前記第1の回折格子にわたって変化し、又は前記第1の回折格子と前記第2の回折格子との間で変化する、
方法。 - 前記第1の一対の開口を前記デバイス層の中にエッチングする段階は、第1導波路側壁に近接した複数の第1の開口のセット、及び第2導波路側壁に近接した複数の第2の開口のセットをエッチングする段階を更に有し、前記第1の一対の開口は、前記複数の第1の開口及び前記複数の第2の開口のそれぞれから1つの開口を含む、請求項16に記載の方法。
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