| Presentation | 2020-11-20 Evaluation of the Optical-axis Rotation Angle of Waveguide Polarization Converter with Asymmetric Cross-section Kotake Shota, Junji Yamauchi, Hisamatsu Hisamatsu, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We propose an accurate technique for evaluating the optical-axis rotation angle of a waveguide-type polarization converter with an asymmetric cross-section. The evaluation is based on the Poynting vector, rather than the previous techniques in which only the electric or magnetic field is used. High accuracy is found using a model of the converter situated on a silica substrate. Further consideration is given to a completely buried converter. Since this model has a symmetry with respect to the 45$^circ$ plane, the optical-axis rotation angle retains 45$^circ$, even when the wavelength is varied. We, therefore, introduce the effect of excitation efficiency between the input eigenmode and the two generated supermodes. The wavelength response of the extinction ratio is improved, confirming a good correlation with the FDTD results. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Si-wire waveguide / polarization converter / optical-axis rotation angle / imaginary-distance beam-propagation method / finite-difference time-domain method |
| Paper # | OPE2020-63,LQE2020-43 |
| Date of Issue | 2020-11-13 (OPE, LQE) |
| Conference Information | |
| Committee | OPE / LQE |
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| 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 |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Evaluation of the Optical-axis Rotation Angle of Waveguide Polarization Converter with Asymmetric Cross-section |
| Sub Title (in English) | |
| Keyword(1) | Si-wire waveguide |
| Keyword(2) | polarization converter |
| Keyword(3) | optical-axis rotation angle |
| Keyword(4) | imaginary-distance beam-propagation method |
| Keyword(5) | finite-difference time-domain method |
| 1st Author's Name | Kotake Shota |
| 1st Author's Affiliation | Hosei University(Hosei Univ.) |
| 2nd Author's Name | Junji Yamauchi |
| 2nd Author's Affiliation | Hosei University(Hosei Univ.) |
| 3rd Author's Name | Hisamatsu Hisamatsu |
| 3rd Author's Affiliation | Hosei University(Hosei Univ.) |
| Date | 2020-11-20 |
| Paper # | OPE2020-63,LQE2020-43 |
| Volume (vol) | vol.120 |
| Number (no) | OPE-243,LQE-244 |
| Page | pp.pp.92-95(OPE), pp.92-95(LQE), |
| #Pages | 4 |
| Date of Issue | 2020-11-13 (OPE, LQE) |