Extended Method of Fast Allocation of USCs for Millimeter-Wave DWDM-ROF Transmission Over ZDSF
Source: International Journal of Infrared and Millimeter Waves, Volume 26, Number 5, May 2005 , pp. 617-635(19)
Abstract:Four-wave mixing (FWM) may happen efficiently and introduce crosstalk at the signal channels in dense-wavelength-division- multiplexing (DWDM) systems employing zero-dispersion-shifted fiber (ZDSF). This paper presents extended method of fast allocation of unequally spaced channels (USCs) to minimize FWM crosstalk in millimeter-wave (MMW) DWDM radio-over-fiber (ROF) systems. When all of the MMW sub-carriers are at same frequency, by spacing the channels unequally using the extended method, all FWM products except the ones bound to be generated at the signal frequencies, can be excluded from the signal channels. While when the MMW sub-carriers are allowed to be different in frequencies, all of the FWM products can be excluded from the signal channels by spacing the channels unequally. Transmission of 622 Mbit/s BPSK data over 40 kilometers ZDSF, with and without wavelength interleaving, are simulated, for both schemes with equally and unequally spaced channels. Results comparison shows that the link performances can be clearly improved, when the channels are unequally spaced using the extended method.
Document Type: Research article
Affiliations: 1: Wireless Communications Laboratory, National Institute of Information and Communications Technology (NiCT), 20 Science Park Road, Singapore, 117674, 2: Telecommunications Program, School of Advanced Technology, Asian Institute of Technology, P.O. Box 4, Pathum Thani, Thailand, 3: Department of Electrical, Computer & Communications Engineering, London South Bank University, 103 Borough Road, London, SE1 0AA, UK,
Publication date: 2005-05-01