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Proceedings Article

Hybrid WDM/OCDMA for next generation access network

[+] Author Affiliations
Xu Wang

Heriot Watt Univ. (United Kingdom)

Naoya Wada, T. Miyazaki

National Institute of Information and Communications Technology (Japan)

G. Cincotti

Univ. of Roma Tre (Italy)

Ken-ichi Kitayama

Osaka Univ. (Japan)

Proc. SPIE 6783, Optical Transmission, Switching, and Subsystems V, 678328 (November 26, 2007); doi:10.1117/12.745673
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From Conference Volume 6783

  • Optical Transmission, Switching, and Subsystems V
  • Dominique Chiaroni; Wanyi Gu; Ken-ichi Kitayama; Chang-Soo Park
  • Wuhan, China | November 01, 2007

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.

© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Xu Wang ; Naoya Wada ; T. Miyazaki ; G. Cincotti and Ken-ichi Kitayama
"Hybrid WDM/OCDMA for next generation access network", Proc. SPIE 6783, Optical Transmission, Switching, and Subsystems V, 678328 (November 26, 2007); doi:10.1117/12.745673; http://dx.doi.org/10.1117/12.745673


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