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Proceedings Paper

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

Paper Details

Date Published: 11 November 2008
PDF: 5 pages
Proc. SPIE 7136, Optical Transmission, Switching, and Subsystems VI, 71363H (11 November 2008); doi: 10.1117/12.803063
Show Author Affiliations
Jianyong Zhang, Beijing Jiaotong Univ. (China)
Muguang Wang, Beijing Jiaotong Univ. (China)
Yongjun Fu, Beijing Jiaotong Univ. (China)
Jihong Cao, Beijing Jiaotong Univ. (China)
Xi Qin, Beijing Jiaotong Univ. (China)
Feng Zhang, Beijing Jiaotong Univ. (China)
Shuisheng Jian, Beijing Jiaotong Univ. (China)


Published in SPIE Proceedings Vol. 7136:
Optical Transmission, Switching, and Subsystems VI
Ken-ichi Kitayama; Pierpaolo C. Ghiggino; Kim Roberts; Yikai Su, Editor(s)

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