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Proceedings Paper

A high sensitive wavelength stability monitoring method using 90o optical hybrid
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Paper Abstract

Coherent detection is a new attractive detection method in optical transmission, especially in high capacity long-haul fiber communication systems. Most coherent detection systems use a local laser as the local oscillator rather than using an optical phase-locked loop (OPLL). In this case, the signal and local laser's wavelength must be as close as possible, and both should be stable. Wavelength stability of DFB laser is a critical factor for optical coherent detection and other applications. We use fiber couplers and a fiber phase shifter to buildup an optical 90o optical hybrid, by which the wavelength fluctuation is monitored with a very high sensitivity.

Paper Details

Date Published: 11 November 2008
PDF: 8 pages
Proc. SPIE 7136, Optical Transmission, Switching, and Subsystems VI, 71360V (11 November 2008); doi: 10.1117/12.803992
Show Author Affiliations
Yong Feng, Tsinghua Univ. (China)
He Wen, Tsinghua Univ. (China)
Hanyi Zhang, Tsinghua Univ. (China)
Xiaoping Zheng, Tsinghua 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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