• Title : Wavelength-division multiplexed millimeter-wave-band radio-on-fiber system using a supercontinuum light source
• Author : Ken-ichi Kitayama, Xu Wang, and Naoya Wada
• Journal : IEEE/OSA J. Lightwave Technology, vol. 24, no. 4, pp. 1654-1662, 2006
• Abstract : It will be revealed that a myth of deploying low bit-rate uplink Fiber-To-The-Home (FTTH) services while providing a high bit-rate downlink is wrong. Therefore, for the future broadband FTTH services the focus should be on the capability to provide Gigabit- or even multi-gigabits-per-second both in up- and downlinks, namely gigabit-symmetric systems. Optical code-division multiple access (OCDMA) now deserves a revisit as a powerful alternative to TDMA and WDMA in FTTH systems. In this paper, we will first highlight the OCDMA systems. We will describe the system architecture and its operation principle, code design, optical en/decoding using a long super-structured fiber Bragg grating (SSFBG) en/decoder, and its system performance. Next, we will propose an OCDMA over WDM PON as a solution for the gigabit-symmetric FTTH systems. We will study the system architecture and the WDM inter-channel crosstalk. It will be shown that by taking advantage of reflection spectrum notches of SSFBG en/decoder, the WDM inter-channel crosstalk can be suppressed, and can enable OCDMA over WDM PON to simultaneously provide multi-gigabit-per-second up- and downlinks to a large number of users.
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