• Title : Dispersion Effects of FBG Filter and Optical SSB Filtering in DWDM Millimeter-Wave Fiber-Radio Systems
• Authors : Ken-ichi Kitayama, Toshiaki Kuri, Kiyoshi Onohara, Tomotada Kamisaka, and Kiyotaka Murashima
• Journal : Journal of Lightwave Technology, Vol.20, No.8, August 2002
• Abstract : We will study the optical filtering technique for dense wavelength division multiplexing (DWDM) channel allocation of millimeter-wave fiber-radio signals in the optical double-side-band (DSB) will format. First, we investigate both theoretically and experimentally the dispersion effect of fiber Bragg grating (FBG) used as the filter on DWDM millimeter-wave optical signal transmission. This result suggests that the dispersion effect has to be considered in the DWDM channel allocation for millimeter-wave fiber-radio access systems. Next, we will propose a DWDM allocation for millimeter-wave fiber-radio systems, which adopts. It can realize the minimum WDM channel interval for optical DSB signals, while it enables the the optical single-sideband (SSB) filtering technique at the receiver side by using a square response of FBG filter optical frequency interleave between the neighboring channels without any serious signal degradation due to the interchannel interference. Then, we will experimentally demonstrate the error-free DWDM transmission of two 60-GHz-band, 155.52-Mb/s differential phase-shift keying (DPSK) fiber-radio signals over 25-km-long single-mode fiber (SMF) with the minimum channel interval of 83.6 GHz (= 0.68nm) by using the test-square response FBGs. Finally, we will show that based upon the experimental results, in the micro-or pico-cellular DWDM broad-band millimeter-wave fiber-radio access network 1000 antenna base stations (BSs) under the coverage of the single central office (CO) would by feasible by sectorizing the zone.

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