Presentation 2020-11-20
Increasing the Extinction Ratio of Si Optical Modulators
Hiroki Kojima, Jun-ichi Hujikata, Tomohiro Kita,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) In recent years, digital coherent optical transmission systems have been put to practical use, and Si modulators with a high extinction ratio are required for coherent system. In this study, we have study to reduce the extinction ratio and have developed a Si modulator with a high extinction ratio of more than 25 dB. The factors limiting the extinction ratio are the intensity absorption due to the carrier plasma effect and the inclusion of TM polarization components. A high extinction ratio of more than 40 dB was successfully achieved by introducing a thermo-optical MZI optical switch to compensate power imbalance due to carrier plasma effect and a polarizer.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Silicon photonics / Optical modulators / High extinction ratio
Paper # OPE2020-70,LQE2020-50
Date of Issue 2020-11-13 (OPE, LQE)

Conference Information
Committee OPE / LQE
Conference Date 2020/11/20(1days)
Place (in Japanese) (See Japanese page)
Place (in English) Online
Topics (in Japanese) (See Japanese page)
Topics (in English)
Chair Goji Nakagawa(Fujitsu) / Hiroshi Yasaka(Tohoku Univ.)
Vice Chair Takaaki Ishigure(Keio Univ.) / Toshitada Umezawa(NICT)
Secretary Takaaki Ishigure(Gunma Univ.) / Toshitada Umezawa(Fujikura)
Assistant Junichi Fujikata(PETRA) / Toshio Watanabe(Kagoshima Univ.) / Kazuue Fujita(Hamamatsu) / Nobuhiko Nishiyama(Tokyo Inst. of Tech.)

Paper Information
Registration To Technical Committee on OptoElectronics / Technical Committee on Lasers and Quantum Electronics
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Increasing the Extinction Ratio of Si Optical Modulators
Sub Title (in English)
Keyword(1) Silicon photonics
Keyword(2) Optical modulators
Keyword(3) High extinction ratio
1st Author's Name Hiroki Kojima
1st Author's Affiliation Waseda University(Waseda Univ.)
2nd Author's Name Jun-ichi Hujikata
2nd Author's Affiliation NEC(NEC)
3rd Author's Name Tomohiro Kita
3rd Author's Affiliation Waseda University(Waseda Univ.)
Date 2020-11-20
Paper # OPE2020-70,LQE2020-50
Volume (vol) vol.120
Number (no) OPE-243,LQE-244
Page pp.pp.125-128(OPE), pp.125-128(LQE),
#Pages 4
Date of Issue 2020-11-13 (OPE, LQE)