NDLI: Theoretical analysis of modified repeated unequally spaced frequency allocations in FDM lightwave transmission systems

Content Provider	IEEE Xplore Digital Library
Author	Kojima, S. Numai, T.
Copyright Year	1983
Abstract	In long-haul frequency-division-multiplexing (FDM) lightwave transmission systems, transmission characteristics are degraded by four-wave mixing (FWM) generated in optical fibers. To date, equally spaced (ES), unequally spaced (US), and repeated unequally spaced (RUS) allocations have been demonstrated in FDM lightwave transmission systems. It has been already revealed theoretically and experimentally that intensities of generated FWM lights with f/sub FWM/=f/sub i/ for RUS are lower than those for ES, and a total bandwidth of signal lights for RUS is comparable to that for US, where f/sub FWM/ is a frequency of an FWM light and f/sub i/ is a frequency of a signal light with a channel index i. In this paper, equally spaced RUS (ERUS) and unequally spaced RUS (URUS) are proposed as modified RUS and are theoretically analyzed. Efficiencies of generated FWM lights and total bandwidths of signal lights for ERUS and URUS are compared with those for RUS. As a result, it is found that efficiencies of generated FWM lights with f/sub FWM/=f/sub i/ for URUS are lower than those for RUS, and total bandwidths of signal lights for ERUS and URUS are comparable to those for RUS. A bit error rate (BER) for URUS is also comparable to that for US (without FWM) at 2.5, 5.0, and 10.0 Gb/s. Because URUS simultaneously satisfies low FWM light efficiencies with f/sub FWM/=f/sub i/, narrow total bandwidths of signal lights, and low BER, it is concluded that URUS is superior to RUS in FDM lightwave transmission systems.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	2786
Ending Page	2797
Page Count	12
File Size	450717
File Format	PDF
ISSN	07338724
Volume Number	24
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio spectrum management Frequency shift keying Bandwidth Frequency division multiplexing Signal generators Bit error rate Wavelength division multiplexing Degradation Four-wave mixing Optical fibers frequency-division multiplexing (FDM) Four-wave mixing (FWM) frequency allocation
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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