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The effect of laser chirping on lightwave system performance

Journal Article · · J. Lightwave Technol.; (United States)
OSTI ID:5774443
Directly modulated semiconductor lasers exhibit a dynamic wavelength shift (chirping) arising from gain-induced variations of the laser refractive index. The effect of laser chirping on the performance of multigigabit-per-second rate lightwave systems operating at a wavelength of 1550 nm is investigated. Models suitable for computer-aided analysis are used to describe the dynamic response of the laser and the propagation of chirped optical pulses through a step-index single-mode optical fiber. A truncated pulse train, Gauss quadrature rule method is used to evaluate the average bit error rate of the receiver. This permits pattern effects in the transmitted optical waveform due to the laser dynamics and nonlinear optical power transmission properties of optical fibers to be included in the system model. The influence that modulation and device parameters have on the receiver sensitivity is assessed.
Research Organization:
Hughes Research Labs., Malibu, CA (USA)
OSTI ID:
5774443
Journal Information:
J. Lightwave Technol.; (United States), Journal Name: J. Lightwave Technol.; (United States) Vol. 7:3; ISSN JLTED
Country of Publication:
United States
Language:
English

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