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Proceedings Paper

Hybrid WDM/OCDMA for next generation access network
Author(s): Xu Wang; Naoya Wada; T. Miyazaki; G. Cincotti; Ken-ichi Kitayama
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Paper Abstract

Hybrid wavelength division multiplexing/optical code division multiple access (WDM/OCDMA) passive optical network (PON), where asynchronous OCDMA traffic transmits over WDM network, can be one potential candidate for gigabit-symmetric fiber-to-the-home (FTTH) services. In a cost-effective WDM/OCDMA network, a large scale multi-port encoder/decoder can be employed in the central office, and a low cost encoder/decoder will be used in optical network unit (ONU). The WDM/OCDMA system could be one promising solution to the symmetric high capacity access network with high spectral efficiency, cost effective, good flexibility and enhanced security. Asynchronous WDM/OCDMA systems have been experimentally demonstrated using superstructured fiber Bragg gratings (SSFBG) and muti-port OCDMA en/decoders. The total throughput has reached above Tera-bit/s with spectral efficiency of about 0.41. The key enabling techniques include ultra-long SSFBG, multi-port E/D with high power contrast ratio, optical thresholding, differential phase shift keying modulation with balanced detection, forward error correction, and etc. Using multi-level modulation formats to carry multi-bit information with single pulse, the total capacity and spectral efficiency could be further enhanced.

Paper Details

Date Published: 26 November 2007
PDF: 14 pages
Proc. SPIE 6783, Optical Transmission, Switching, and Subsystems V, 678328 (26 November 2007); doi: 10.1117/12.745673
Show Author Affiliations
Xu Wang, Heriot Watt Univ. (United Kingdom)
Naoya Wada, National Institute of Information and Communications Technology (Japan)
T. Miyazaki, National Institute of Information and Communications Technology (Japan)
G. Cincotti, Univ. of Roma Tre (Italy)
Ken-ichi Kitayama, Osaka Univ. (Japan)


Published in SPIE Proceedings Vol. 6783:
Optical Transmission, Switching, and Subsystems V
Dominique Chiaroni; Wanyi Gu; Ken-ichi Kitayama; Chang-Soo Park, Editor(s)

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