Abstract
Optical frequency-division-multiplexed (OFDM) networks are very attractive because the transmission capacity can be increased to over 100 Gbit/s (Ref. 1) and network-oriented functions such as route switching can be realized.2 This paper reports the results of a 10-channel × 10-Gbit/s transmission experiment without dispersion-management fiber. As countermeasure to four-wave mixing, unequal channel spacing was introduced.3 In addition, gain imbalance accumulation due to the concatenated amplifiers was equalized by a gain equalizer.4
© 1995 Optical Society of America
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