Optimum Laser Chirp Range for AM Video Transmission (1992)

By Henry A. Blauvelt, P. C. Chen, Norman Kwong, and Israel Ury, Ortel Corporation

Simple expressions for the impact of DFB laser chirp on the system noise and distortion specifications of AM CATV fiber links are derived. These expressions are found to agree well with measured results. There is a narrow range of chirp for which degradation of both noise and distortion is low. 1310 nm lasers are found to have chirp within the acceptable range. 1550 nm laser are found to have chirp that is unacceptably large for most CATV applications.

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