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Group-delay characterization of cascaded chirped fiber-Bragg-grating dispersion compensators

✍ Scribed by Yan Liu; Zhongwei Tan; Yong Chen; Jihong Cao; Kai Zheng; Tigang Ning; Ting Chen; Shuisheng Jian

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
109 KB
Volume
47
Category
Article
ISSN
0895-2477

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✦ Synopsis

Based on linear-system theory, a method to obtain the total group-delay characteristics of the cascaded chirped fiber Bragg grating (FBG) from the measured group delays of each grating is proposed. The method is then used to characterize cascaded chirped FBGs used as the dispersion compensators of an experimental eight-channel 10-Gb/s NRZ system over 1500-km G.652 fiber. The inband total localdispersion deviation curve is calculated and shows good consistency with the tendency of the inband BER fluctuations, which indicates that the inband local dispersion deviation may be the main reason for the dependence of such a system performance on signal wavelength, and its RMS value can be taken as the indicator of performance tolerance to wavelength instability. Numerical simulation is also performed, by which a near linear scaling of the simulated EOP with total localdispersion deviation is shown.

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