| Presentation | 2018-12-06 [Encouragement Talk] Wide bandwidth and high responsivity of InP-based waveguide photodiodes for over 400 Gbps coherent transmission systems Takuya Okimoto, Hideki Yagi, Ryuji Masuyama, Kenji Sakurai, Yoshifumi Nishimoto, Kazuhiko Horino, Takayuki Watanabe, Mitsuru Ekawa, Yoshihiro Yoneda, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | For high speed coherent transmission system over 400 Gbps, photodetectors for coherent receivers with both the wide bandwidth and high responsivity are required by overcoming the tradeoff. In the waveguide p-i-n photodiode (PD) array monolithically integrated with the 90? hybrid, we introduced the low doped n^--InP buffer layer under the absorption layer of PDs and the core layer of the 90? hybrid. Due to this layer, short carrier transit time, small diode capacitance and suppression of waveguide propagation loss caused by free carrier absorption were realized at the same time, and we achieved to be compatible with the wide 3-dB bandwidth and high responsivity. Moreover, by adopting the butt-joint structure with the low doped n^--GaInAsP layer underneath the thin absorption layer, coupling loss between the input waveguide and PDs was suppressed and we demonstrated the wide 3-dB bandwidth of 50 GHz and the 4-channel averaged responsivity as high as 0.150 A/W at a wavelength of 1550 nm. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Coherent transmission / InP / 90? hybrid / p-i-n PD / Butt-joint regrowth |
| Paper # | OPE2018-97,LQE2018-107,SIPH2018-13 |
| Date of Issue | 2018-11-29 (OPE, LQE) |
| Conference Information | |
| Committee | LQE / OPE |
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| Conference Date | 2018/12/6(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Keio University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Photonic Device Workshop |
| Chair | Kiichi Hamamoto(Kyusyu Univ.) / Kouki Sato(Furukawa Electric Industries) |
| Vice Chair | Hiroshi Aruga(Mitsubishi Electric) / Hiroshi Takahashi(Sophia Univ.) |
| Secretary | Hiroshi Aruga(SEI) / Hiroshi Takahashi(Furukawa Electric Industries) |
| Assistant | Masaya Nagai(Osaka Univ.) / Yuya Shoji(Tokyo Inst. of Tech.) / Kazunori Seno(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Lasers and Quantum Electronics / Technical Committee on OptoElectronics |
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| Language | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Encouragement Talk] Wide bandwidth and high responsivity of InP-based waveguide photodiodes for over 400 Gbps coherent transmission systems |
| Sub Title (in English) | |
| Keyword(1) | Coherent transmission |
| Keyword(2) | InP |
| Keyword(3) | 90? hybrid |
| Keyword(4) | p-i-n PD |
| Keyword(5) | Butt-joint regrowth |
| 1st Author's Name | Takuya Okimoto |
| 1st Author's Affiliation | Sumitomo Electric Device Innovations, Inc.(SEDI) |
| 2nd Author's Name | Hideki Yagi |
| 2nd Author's Affiliation | Sumitomo Electric Industries, Ltd.(SEI) |
| 3rd Author's Name | Ryuji Masuyama |
| 3rd Author's Affiliation | Sumitomo Electric Device Innovations, Inc.(SEDI) |
| 4th Author's Name | Kenji Sakurai |
| 4th Author's Affiliation | Sumitomo Electric Device Innovations, Inc.(SEDI) |
| 5th Author's Name | Yoshifumi Nishimoto |
| 5th Author's Affiliation | Sumitomo Electric Device Innovations, Inc.(SEDI) |
| 6th Author's Name | Kazuhiko Horino |
| 6th Author's Affiliation | Sumitomo Electric Device Innovations, Inc.(SEDI) |
| 7th Author's Name | Takayuki Watanabe |
| 7th Author's Affiliation | Sumitomo Electric Device Innovations, Inc.(SEDI) |
| 8th Author's Name | Mitsuru Ekawa |
| 8th Author's Affiliation | Sumitomo Electric Industries, Ltd.(SEI) |
| 9th Author's Name | Yoshihiro Yoneda |
| 9th Author's Affiliation | Sumitomo Electric Device Innovations, Inc.(SEDI) |
| Date | 2018-12-06 |
| Paper # | OPE2018-97,LQE2018-107,SIPH2018-13 |
| Volume (vol) | vol.118 |
| Number (no) | OPE-348,LQE-349,SIPH- |
| Page | pp.pp.1-5(OPE), pp.1-5(LQE), pp.1-5(SIPH), |
| #Pages | 5 |
| Date of Issue | 2018-11-29 (OPE, LQE) |