JP7247120B2 - 光集積素子および光モジュール - Google Patents
光集積素子および光モジュール Download PDFInfo
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Description
図1Aは、第1実施形態に係る光集積素子の導波路方向断面図であり、図1Bは、第1実施形態に係る光集積素子の上面図であり、図1Cは、第1実施形態に係る光集積素子の断面図である。なお、図1Aおよび図1Bに記載の矢印(a)~(c)は、図1Cに記載の断面の箇所に対応している。
図2Aは、第2実施形態に係る光集積素子の導波路方向断面図であり、図2Bは、第2実施形態に係る光集積素子の上面図であり、図2Cは、第2実施形態に係る光集積素子の断面図である。なお、図2Aおよび図2Bに記載の矢印(a)~(c)は、図2Cに記載の断面の箇所に対応している。
図3Aは、第3実施形態に係る光集積素子の導波路方向断面図であり、図3Bは、第3実施形態に係る光集積素子の上面図であり、図3Cは、第3実施形態に係る光集積素子の断面図である。なお、図3Aおよび図3Bに記載の矢印(a)~(e)は、図3Cに記載の断面の箇所に対応している。
第4実施形態に係る光集積素子400は、第3実施形態の特徴を適用した光集積素子である。図4は、第4実施形態に係る光集積素子400の概略上面図である。
図6は、第5実施形態に係る光モジュールである送信機モジュールの概略構成図である。第5実施形態に係る光送信機モジュール500は、上記第1実施形態から第4実施形態に係る光集積素子のうち何れか1つを用いた光送信機モジュールであるが、ここでは、第4実施形態に係る光集積素子400を用いた光送信機モジュールを例示する。
101,201,301,401 基板
102,202,302,402 下部クラッド層
103,203,303,403 導波路コア
104,204,304,404 上部クラッド層
105,205,305,405 コンタクト層
106,206,306,406 変調器コア
107,207,307,407 量子井戸層
108,208,308,408 中間層
309,409 SSCコア
410a,410b 電極
411 パシベーション膜
412 樹脂層
420 IQ変調器
430 SOA
440 SSC
500 光送信機モジュール
501 波長可変半導体レーザ
502a,502b 第1レンズ
503a,503b 第2レンズ
504 光ファイバ
Claims (8)
- 基板と、
前記基板上に、下部クラッド層と、前記下部クラッド層よりも屈折率の高い第1コア層と、前記第1コア層よりも屈折率の低い上部クラッド層とを順次積層した第1導波路領域と、
前記基板上に、前記下部クラッド層と、前記下部クラッド層よりも屈折率の高い第2コア層と、電流が注入されることによって光を増幅する量子井戸層と、前記上部クラッド層とを順次積層した活性領域と、
前記基板上に、前記下部クラッド層と、前記第2コア層と、前記上部クラッド層とを順次積層した第2導波路領域と、
を備え、
前記第2コア層と前記量子井戸層との間は、前記第2コア層を導波している光のモードフィールドの範囲内で近接しており、
前記第1コア層と、前記第2コア層及び前記量子井戸層とが突合せ接合されており、
前記第2導波路領域は、前記活性領域と縦続接続し、
前記第2導波路領域は、前記基板と前記下部クラッド層との間に積層され、前記基板および前記下部クラッド層よりも屈折率の高い第3コア層を備えており、
前記第2導波路領域の少なくとも一部は、前記上部クラッド層がメサ状に突出したローメサ構造の第1メサ領域を有しており、
前記第2導波路領域は、前記第2コア層と前記下部クラッド層と前記第3コア層とがメサ状に突出したメサ構造を有するスポットサイズ変換領域を含み、
前記スポットサイズ変換領域におけるメサ構造のメサ幅は、前記第1メサ領域におけるローメサ構造のメサ幅よりも広く、かつ、前記メサ構造を有するスポットサイズ変換領域では、前記第1メサ領域におけるローメサ構造のメサ幅が連続的に変化している
ことを特徴とする光集積素子。 - 前記第2コア層と、前記量子井戸層の間に、前記第2コア層及び前記量子井戸層と異なる組成の中間層を備える
ことを特徴とする請求項1に記載の光集積素子。 - 前記中間層は、前記下部クラッド層または前記上部クラッド層と同じ組成である
ことを特徴とする請求項2に記載の光集積素子。 - 前記下部クラッド層の導電型がn型であり、前記上部クラッド層の導電型がp型である
ことを特徴とする請求項1~3のいずれか一つに記載の光集積素子。 - 前記第1導波路領域は、前記上部クラッド層がメサ状に突出したローメサ構造の第2メサ領域と、前記上部クラッド層と前記第1コア層と前記下部クラッド層の一部とがメサ状に突出したハイメサ構造の第3メサ領域とを有し、
前記活性領域は、ローメサ構造を有し、
前記活性領域と前記第2メサ領域とは、ローメサ構造で接続されており、
前記第2メサ領域のローメサ構造と前記第3メサ領域のハイメサ構造とが光学的に接続されている、
ことを特徴とする請求項1~4のいずれか一つに記載の光集積素子。 - 前記基板上の前記第1導波路領域は、導波する光の位相を変調する位相変調器として機能する変調器領域を有しており、前記変調器領域における前記第1コア層が、光を導波する変調器コア層である
ことを特徴とする請求項1~4のいずれか一つに記載の光集積素子。 - 前記位相変調器は、マッハツェンダ型の変調器である
ことを特徴とする請求項6に記載の光集積素子。 - 請求項1~7のいずれか一つに記載の光集積素子を備えることを特徴とする光モジュール。
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JP2018021088 | 2018-02-08 | ||
JP2018021088 | 2018-02-08 | ||
PCT/JP2019/004512 WO2019156189A1 (ja) | 2018-02-08 | 2019-02-07 | 光集積素子および光モジュール |
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JPWO2019156189A1 JPWO2019156189A1 (ja) | 2021-01-28 |
JP7247120B2 true JP7247120B2 (ja) | 2023-03-28 |
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