Polarization diversity techniques for the use of coherent optical fiber submarine cable systems

Autor:	Hiroharu Wakabayashi, Y. Namihira, Shiro Ryu, K. Mochizuki, Shu Yamamoto
Rok vydání:	1991
Předmět:	Optical fiber cable Engineering Frequency-shift keying Optical fiber business.industry Sea trial Optical communication Optical polarization Transmission system Polarization (waves) Atomic and Molecular Physics and Optics law.invention law Electronic engineering business
Zdroj:	Journal of Lightwave Technology. 9:675-682
ISSN:	0733-8724
DOI:	10.1109/50.79545
Popis:	Recent research and development work on coherent transmission systems, with emphasis on its application to optical-fiber submarine cable systems, are described. The authors demonstrated the feasibility of a polarization diversity scheme in a laboratory environment as well as in the first sea trial of a coherent frequency-shift-keying (FSK) system. The authors propose a novel external cavity laser module and a polarization coupling/dividing module in order to improve the system performance. The polarization fluctuation speed in optical-fiber submarine cable reaches 50 Hz in the worst case, and the polarization diversity scheme is a simple and very powerful technique under such polarization fluctuation conditions. >
Databáze:	OpenAIRE
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