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Paper Abstract and Keywords
Presentation 2011-07-12 11:35
Rectangular QPSK for Generation of Optical 8PSK
Guo-Wei Lu, Takahide Sakamoto, Tetsuya Kawanishi (NICT)
Abstract (in Japanese) (See Japanese page) 
(in English) Rectangular QPSK (quadrature phase-shift keying) is expected to be obtained when driving an in-phase/quadrature (IQ) modulator in an unbalanced manner. It could be applied to generate multilevel modulation format, like eight-ary phase-shift keying (8PSK). In this paper, we propose and experimentally demonstrate an optical 8PSK transmitter using two tandem IQ modulators. A 30-Gb/s 8PSK is successfully generated through cascading a rectangular QPSK and a square QPSK.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical Communications / Optical Coherent System / Optical modulation format / quadrature phase-shift keying / in-phase/quadrature modulator / 8-ary phase-shift keying / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 122, OCS2011-38, pp. 67-69, July 2011.
Paper # OCS2011-38 
Date of Issue 2011-07-04 (OCS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee OCS  
Conference Date 2011-07-11 - 2011-07-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka Univ. Nakanoshima Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Optical modulation format, Multi-level optical modulation, Coherent optical communication, Optical amplifier/repeater technology, Nonlinerity and polarization issue, Dispersion compensating device, Optical signal processing, Optical measurement equipment, Digital signal processing for optical communication, optical communicaton measurement, LSI for optical communication, Error correction, etc. 
Paper Information
Registration To OCS 
Conference Code 2011-07-OCS 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Rectangular QPSK for Generation of Optical 8PSK 
Sub Title (in English)  
Keyword(1) Optical Communications  
Keyword(2) Optical Coherent System  
Keyword(3) Optical modulation format  
Keyword(4) quadrature phase-shift keying  
Keyword(5) in-phase/quadrature modulator  
Keyword(6) 8-ary phase-shift keying  
1st Author's Name Guo-Wei Lu  
1st Author's Affiliation National Institute of Information and Communications Technology (NICT)
2nd Author's Name Takahide Sakamoto  
2nd Author's Affiliation National Institute of Information and Communications Technology (NICT)
3rd Author's Name Tetsuya Kawanishi  
3rd Author's Affiliation National Institute of Information and Communications Technology (NICT)
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Date Time 2011-07-12 11:35:00 
Presentation Time 25 
Registration for OCS 
Paper # IEICE-OCS2011-38 
Volume (vol) IEICE-111 
Number (no) no.122 
Page pp.67-69 
#Pages IEICE-3 
Date of Issue IEICE-OCS-2011-07-04 

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