Optimal Position of Optical Phase Conjugator for Compensation of Distorted WDM Signals with Initial Frequency Chirp

Lee, Seong-Real; Choi, Byung-Ha; Chung, Myung-Rae

Journal of the Korean Institute of Electromagnetic and Science 2005;5(1):36-42.

Seong-Real Lee¹, Byung-Ha Choi², Myung-Rae Chung²

¹Div. of Marine Electro. and Comm. Eng. Mokpo National Maritime University
²Div. of Marine Electro. and Comm. Eng., Mokpo National Maritime University

Abstract

In this paper, the optimal position of optical phase conjugator(OPC) excellently compensating distorted WDM channels with initial frequency chirp due to both chromatic dispersion and self phase modulation(SPM) is numerically investigated. Highly-nonlinear dispersion shifted fiber(HNL-DSF) is used as a nonlinear medium of OPC in order to widely compensate WDM signal band. It is confirmed that if the OPC position was shifted from mid-way of total transmission length dependence on the initial frequency chirp as well as modulation format and fiber dispersion coefficient, it is possible to cancel the performance degradation owing to the initial frequency chirp. Using proposed configuration, it is possible to remove all in-line dispersion compensator, reducing span losses and system costs in the long-haul broadband WDM systems.