| Presentation | 2012-07-26 Nyquist WDM Transmission of 10 Gsybmol/s Polarization-Division Multiplexed 64QAM Optical Signals Koji IGARASHI, Kazuhiro KATOH, Kazuro KIKUCHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Generating rectangular-shaped optical spectra with the bandwidth equal to the symbol rate frequency, we can align such optical signals in the optical frequency domain without the frequency gap between adjacent channels. This is called Nyquist wavelength-division multiplexing (WDM) technique, and leads to the spectral efficiency of 1 sybmol/s/Hz. In this paper, we experimentally evaluated the bit-error rate performance of the polarization-division multiplexed (PDM) high-order QAM optical signals in the Nyquist WDM condition. Namely, we generated the 4QAM, 16QAM and 64QAM signals with the rectangular-shaped spectra using the digital signal processing following digital-to-analog conversion and optical IQ modulation. Multiplexing two channels of such QAM signals with rectangular-shaped spectra, we measured the characteristics of the cross-talk noise from adjust WDM channel. The power penalty is negligible for 4QAM when the frequency space is 10 GHz. On the other hand, those for 16QAM and 64QAM are 1 dB and 2 dB, respectively. Finally, we successfully transmitted Nyquist WDM PDM 64QAM signals over 50 km. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical Coherent Communication / Wavelength Division Multiplexing |
| Paper # | OCS2012-22 |
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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) | Nyquist WDM Transmission of 10 Gsybmol/s Polarization-Division Multiplexed 64QAM Optical Signals |
| Sub Title (in English) | |
| Keyword(1) | Optical Coherent Communication |
| Keyword(2) | Wavelength Division Multiplexing |
| 1st Author's Name | Koji IGARASHI |
| 1st Author's Affiliation | The University of Tokyo() |
| 2nd Author's Name | Kazuhiro KATOH |
| 2nd Author's Affiliation | The University of Tokyo |
| 3rd Author's Name | Kazuro KIKUCHI |
| 3rd Author's Affiliation | The University of Tokyo |
| Date | 2012-07-26 |
| Paper # | OCS2012-22 |
| Volume (vol) | vol.112 |
| Number (no) | 152 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |