Abstract

Dispersion and dispersion slope compensation over broadband has been recognized as a crucial technique to improve performance of transmission links in high-speed long-haul Wavelength Division Multiplexing (WDM) transmission systems.1,2 One of dispersion compensation techniques is to use a higher-order-mode (HOM) in a few-mode fiber along with a spatial mode converter (MC).3 Main advantages would be achievement of a very large negative dispersion in a shorter length of dispersion compensating fiber (DCF). Shorter interaction length can provide a lower insertion loss, and nonlinear effects could be reduced due to its large effective area.4,5 Despite these merits, HOM techniques need mating mode converters with a high conversion efficiency and low insertion loss. LP01–LP11 and LP01–LP02 converters have been reported using periodic coupling such as microbending6 and photo-induced index change7 in optical fibers. Recently, a ring type MC based on a tapered hollow optical fiber (HOF) is reported by the authors.8

© 2002 Optical Society of America

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References

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