| Presentation | 2022-11-11 Time-resolve constellation monitoring of quadrature amplitude modulation optical signals with time-and-frequency slicing-and-synthesizing method Tsubasa Fujiwara, Koji Igarashi, Fumihiko Ito, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In coherent transmission systems, we require simple constellation monitoring of quadrature amplitude modulation (QAM) optical signals without signal equalization. We propose a spectrally slicing-and-synthesizing method, where narrow bandwidth slices of periodic optical signals are sequentially measured using low-speed coherent receivers, and they are synthesized by signal processing. In the method, the laser coherence time is required to be longer than the temporal period of the optical signals because the phase noise is suppresed based on the periodicity of the optical signal. To avoid the limitation due to the laser coherence time, we propose a time-and-frequency slicing-and-synthesizing method to divide signal components in not only the spectral domain but also the temporal domain, enabling to measure time-resolve constellation monitoring. With our proposed method, we measure time-resolve constellation diagrams of 12.5-Gbaud quadrature phase shift keying and 16QAM optical signals using a 2-Gsample/sec oscilloscope with a 400-MHz bandwidth. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | optical measurement / complex field measurement / quadrature modulation signal |
| Paper # | OCS2022-47 |
| Date of Issue | 2022-11-03 (OCS) |
| Conference Information | |
| Committee | ITE-BCT / OCS / IEE-CMN / OFT |
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| Conference Date | 2022/11/10(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Forest-Sendai |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Kyoichi Saito(NHK) / Takeshi Hoshida(Fujitsu) / Shun Morimura(CRIEPI) / Makoto Yamada(Osaka Metropolitan Univ.) |
| Vice Chair | Hidekazu Murata(Yamaguchi Univ.) / Hajime Saito(TV Tokyo) / / Kouji Hirata(Kansai Univ) |
| Secretary | Hidekazu Murata(NHK) / Hajime Saito(TV Asahi) / (NHK) / Kouji Hirata(Toshiba Infrastracture Systems & Solutions) / (Panasonic) |
| Assistant | Tatsuhiro Nakada(Hitachi Kokusai Electric) / Daiki Fukudome(NHK) / Susumu Onogi(ytv) / / Yuuichi Shinohara(TEPCO Power Grid) / Akihiro Tanaka(CRIEPI) / Yukihiro Goto(NTT) / Naoyuki Ozawa(Fujikura) |
| Paper Information | |
| Registration To | Technical Group on Broadcasting Technology / Technical Committee on Optical Communication Systems / Technical Meeting on Communications / Technical Committee on Optical Fiber Technology |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Time-resolve constellation monitoring of quadrature amplitude modulation optical signals with time-and-frequency slicing-and-synthesizing method |
| Sub Title (in English) | |
| Keyword(1) | optical measurement |
| Keyword(2) | complex field measurement |
| Keyword(3) | quadrature modulation signal |
| 1st Author's Name | Tsubasa Fujiwara |
| 1st Author's Affiliation | Osaka University(Osaka Univ) |
| 2nd Author's Name | Koji Igarashi |
| 2nd Author's Affiliation | Osaka University(Osaka Univ) |
| 3rd Author's Name | Fumihiko Ito |
| 3rd Author's Affiliation | Shimane University(Shimane Univ) |
| Date | 2022-11-11 |
| Paper # | OCS2022-47 |
| Volume (vol) | vol.122 |
| Number (no) | OCS-245 |
| Page | pp.pp.41-45(OCS), |
| #Pages | 5 |
| Date of Issue | 2022-11-03 (OCS) |