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Paper Abstract and Keywords
Presentation 2018-10-11 14:00
[Poster Presentation] Single-channel 7.68 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 9.7 bit/s/Hz
Kosuke Kimura, Nitta Junpei, Masato Yoshida, Keisuke Kasai, Toshiko Hirooka, Masataka Nakazawa (Tohoku Univ.) OFT2018-27
Abstract (in Japanese) (See Japanese page) 
(in English) We achieved a record capacity of 7.68 Tbit/s in a single channel coherent Nyquist pulse transmission over 150 km with a 9.7 bit/s/Hz spectral efficiency. In this scheme, a 1.39 ps optical Nyquist pulse with a high OSNR was generated by combining a mode-locked laser and a highly nonlinear fiber at both the transmitter and receiver. In addition, we suppressed a nonlinear phase rotation at an EDFA in the transmitter by broadening the pulse width with second-order dispersion and recompressed it to the original pulse width before a 150 km transmission link. At the receiver, a Nyquist LO pulse was synchronized to a transmitted OTDM data with an advanced optical phase-locked loop based on the higher harmonics of the mode-locked laser mode. By employing these improvements, we succeeded in a bit error rate below 2 x 10-2 for all the tributaries.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical Nyquist pulse / Coherent / OTDM / / / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 238, OFT2018-27, pp. 67-71, Oct. 2018.
Paper # OFT2018-27 
Date of Issue 2018-10-04 (OFT) 
ISSN Online edition: ISSN 2432-6380
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Conference Information
Committee OFT  
Conference Date 2018-10-11 - 2018-10-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Touhoku Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To OFT 
Conference Code 2018-10-OFT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Single-channel 7.68 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 9.7 bit/s/Hz 
Sub Title (in English)  
Keyword(1) Optical Nyquist pulse  
Keyword(2) Coherent  
Keyword(3) OTDM  
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1st Author's Name Kosuke Kimura  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Nitta Junpei  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Masato Yoshida  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
4th Author's Name Keisuke Kasai  
4th Author's Affiliation Tohoku University (Tohoku Univ.)
5th Author's Name Toshiko Hirooka  
5th Author's Affiliation Tohoku University (Tohoku Univ.)
6th Author's Name Masataka Nakazawa  
6th Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2018-10-11 14:00:00 
Presentation Time 90 minutes 
Registration for OFT 
Paper # OFT2018-27 
Volume (vol) vol.118 
Number (no) no.238 
Page pp.67-71 
#Pages
Date of Issue 2018-10-04 (OFT) 


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