Modulator bias control based on dither signal in 40Gb/s RZ optical transmission system

Jianyong Zhang; Muguang Wang; Yongjun Fu; Jihong Cao; Xi Qin; Feng Zhang; Shuisheng Jian

doi:10.1117/12.803063

11 November 2008 Modulator bias control based on dither signal in 40Gb/s RZ optical transmission system

Jianyong Zhang, Muguang Wang, Yongjun Fu, Jihong Cao, Xi Qin, Feng Zhang, Shuisheng Jian

Proceedings Volume 7136, Optical Transmission, Switching, and Subsystems VI; 71363H (2008) https://doi.org/10.1117/12.803063
Event: Asia-Pacific Optical Communications, 2008, Hangzhou, China

Abstract

The bias drift effect in the packaged LiNbO₃ modulator is investigated. The Bessel expansion of the dithered clock shows that the harmonic component equal to the dither frequency can be synchronously demodulated to get the bias drift and avoid the random phase difference between the clock or data and the dither signal. By using the time division control method one control system can track two modulator bias drift in 40Gb/s RZ optical transmission system because the optimum bias point changes very slowly.

Citation Download Citation

Jianyong Zhang, Muguang Wang, Yongjun Fu, Jihong Cao, Xi Qin, Feng Zhang, and Shuisheng Jian "Modulator bias control based on dither signal in 40Gb/s RZ optical transmission system", Proc. SPIE 7136, Optical Transmission, Switching, and Subsystems VI, 71363H (11 November 2008); https://doi.org/10.1117/12.803063

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