| Presentation | 2012-07-26 32 RZ/QAM coherent optical transmission employing an RZ-CW conversion technique Keisuke KASAI, David Odeke OTUYA, Masato YOSHIDA, Toshihiko HIROOKA, Masataka NAKAZAWA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Coherent optical time division multiplexing (OTDM) transmission with a multi-level modulation format has attracted a lot of attention as a ultra-high speed and highly spectral-efficient optical transmission system. However, in the conventional coherent OTDM, it is difficult to demodulate an ultra-high speed, multi-level RZ data signal with a high signal to noise ratio due to input optical power limitation of coherent detection circuits. Recently, we proposed a demodulation scheme by using an RZ-CW conversion scheme in a coherent receiver, in which the transmitted coherent RZ data are OTDM demultiplexed and converted into a data signal on a CW carrier. In this paper, we demonstrate an advantage of the scheme with 10 Gsymbol/s, 4- and 8-OTDM 32 RZ/QAM demodulation experiments. Furthermore, we have successfully transmitted a polarization multiplexed, 10 Gsymbol/s, 32 RZ/QAM (800 Git/s) data signal over 225 km by using this conversion scheme. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Coherent transmission / Optical time division multiplexing / QAM / Optical phase-locked loop |
| Paper # | OCS2012-23 |
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| Committee | OCS |
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| Conference Date | 2012/7/19(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Optical Communication Systems (OCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | 32 RZ/QAM coherent optical transmission employing an RZ-CW conversion technique |
| Sub Title (in English) | |
| Keyword(1) | Coherent transmission |
| Keyword(2) | Optical time division multiplexing |
| Keyword(3) | QAM |
| Keyword(4) | Optical phase-locked loop |
| 1st Author's Name | Keisuke KASAI |
| 1st Author's Affiliation | Research Institute of Electrical Communication, Tohoku University() |
| 2nd Author's Name | David Odeke OTUYA |
| 2nd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 3rd Author's Name | Masato YOSHIDA |
| 3rd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 4th Author's Name | Toshihiko HIROOKA |
| 4th Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 5th Author's Name | Masataka NAKAZAWA |
| 5th Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| Date | 2012-07-26 |
| Paper # | OCS2012-23 |
| Volume (vol) | vol.112 |
| Number (no) | 152 |
| Page | pp.pp.- |
| #Pages | 6 |
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