Precise compensation of fiber group delay in coherent optical fiber communications

Junichi Nakagawa; Takanori Okoshi

doi:10.1117/12.139325

17 December 1992 Precise compensation of fiber group delay in coherent optical fiber communications

Junichi Nakagawa, Takanori Okoshi

Proceedings Volume 1787, Multigigabit Fiber Communications; (1992) https://doi.org/10.1117/12.139325
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

A group delay in an optical fiber is one of the major factors limiting the transmission distance of a long-distance, high bit-rate optical fiber communication system using in-line erbium doped fiber amplifiers (EDFAs). The group delay can be compensated by a delay equalizer (a stripline section, for instance) inserted in the intermediate frequency stage of a coherent receiver. The purpose of this paper is to propose a method for compensating the fiber group- delay precisely by adjusting the width distribution of a nonuniform, open-type stripline compensator and thus optimizing its group-delay characteristics. It is shown that, by using the optimized nonuniform stripline, the overall group-delay dispersion is reduced to approximately 1/20 of the value obtained with an ordinary, uniform stripline compensator. The effectiveness of the optimized stripline was confirmed by a computer simulation of the entire system.

Citation Download Citation

Junichi Nakagawa and Takanori Okoshi "Precise compensation of fiber group delay in coherent optical fiber communications", Proc. SPIE 1787, Multigigabit Fiber Communications, (17 December 1992); https://doi.org/10.1117/12.139325

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