| Presentation | 2021-10-22 Theoretical and Experimental Investigation of OMA Penalty by Inter-Arm Imbalance in Mach-Zehnder Silicon Optical Modulators Tadashi Murao, Jun Ushida, Hiroyuki Takahashi, Masatoshi Tokushima, Akemi Shiina, Tsuyoshi Horikawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, an inter-arm imbalance and its impact on the optical modulation amplitude (OMA) are investigated for carrier-depletion Mach-Zehnder (MZ) silicon optical modulators. First, we propose a generalized form of the large-signal modulation efficiency (ME) that takes the nonlinear response to the voltages into account. It is revealed that this beneficial expression can serve as characterizing the inter-arm imbalance effectively and that the imbalance causes a push-pull imbalance. A beneficial quantification of the imbalance is proposed, namely, a push-pull-imbalanced penalty (PPIP), which is associated with the impact on device performance. The evaluation of the PPIP is demonstrated for the fabricated modulators on a 300-mm SOI wafer. The validity of the derivation is also confirmed by establishing a wafer-level fully-automated evaluation technique for the extinction ratio. Then, it is shown that another inter-arm imbalance also causes an OMA penalty in terms of the absorption loss and is quantified, namely, an absorption-loss-imbalanced penalty (ALIP). In order to evaluate this, we establish a methodology to measure the absorption loss in each arm separately without exploiting any special test element groups (TEGs). |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Wafer-level testing / Silicon modulator / Modulation efficiency / Optical modulation amplitude |
| Paper # | OCS2021-19,OPE2021-39,LQE2021-18 |
| Date of Issue | 2021-10-15 (OCS, OPE, LQE) |
| Conference Information | |
| Committee | OCS / OPE / LQE |
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| Conference Date | 2021/10/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Takeshi Hoshida(Fujitsu) / Takaaki Ishigure(Keio Univ.) / Toshitada Umezawa(NICT) |
| Vice Chair | / Toshikazu Hashimoto(NTT) / Junichi Takahara(Osaka Univ.) |
| Secretary | (NTT) / Toshikazu Hashimoto(Fujikura) / Junichi Takahara(Tokushima Univ.) |
| Assistant | / Hirokazu Kobayashi(Kochi Univ. of Tech) / Tadashi Murao(Mitsubishi Electric) / Shinsuke Tanaka(Fujitsu) / Nobuhiko Nishiyama(Tokyo Inst. of Tech.) |
| Paper Information | |
| Registration To | Technical Committee on Optical Communication Systems / Technical Committee on OptoElectronics / Technical Committee on Lasers and Quantum Electronics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Theoretical and Experimental Investigation of OMA Penalty by Inter-Arm Imbalance in Mach-Zehnder Silicon Optical Modulators |
| Sub Title (in English) | |
| Keyword(1) | Wafer-level testing |
| Keyword(2) | Silicon modulator |
| Keyword(3) | Modulation efficiency |
| Keyword(4) | Optical modulation amplitude |
| 1st Author's Name | Tadashi Murao |
| 1st Author's Affiliation | Photonics Electronics Technology Research Association(PETRA) |
| 2nd Author's Name | Jun Ushida |
| 2nd Author's Affiliation | Photonics Electronics Technology Research Association(PETRA) |
| 3rd Author's Name | Hiroyuki Takahashi |
| 3rd Author's Affiliation | Photonics Electronics Technology Research Association(PETRA) |
| 4th Author's Name | Masatoshi Tokushima |
| 4th Author's Affiliation | Photonics Electronics Technology Research Association(PETRA) |
| 5th Author's Name | Akemi Shiina |
| 5th Author's Affiliation | Photonics Electronics Technology Research Association(PETRA) |
| 6th Author's Name | Tsuyoshi Horikawa |
| 6th Author's Affiliation | Photonics Electronics Technology Research Association(PETRA) |
| Date | 2021-10-22 |
| Paper # | OCS2021-19,OPE2021-39,LQE2021-18 |
| Volume (vol) | vol.121 |
| Number (no) | OCS-213,OPE-214,LQE-215 |
| Page | pp.pp.33-38(OCS), pp.33-38(OPE), pp.33-38(LQE), |
| #Pages | 6 |
| Date of Issue | 2021-10-15 (OCS, OPE, LQE) |