The effect of laser chirping on lightwave system performance

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 multi-Gb/s 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 fibre. 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. >

[1]  Shu Yamamoto,et al.  Analysis of chirp power penalty in 1.55-µm DFB-LD high-speed optical fiber transmission systems , 1987 .

[2]  Govind P. Agrawal,et al.  Pulse-shape effects on frequency chirping in single-frequency semiconductor lasers under current modulation , 1986 .

[3]  Bahaa E. A. Saleh,et al.  Coherence and intersymbol interference in digital fiber optic communication systems , 1982 .

[4]  R. Linke,et al.  Modulation induced transient chirping in single frequency lasers , 1985 .

[5]  John C. Cartledge,et al.  Effect of laser chirping on lightwave system performance , 1988 .

[6]  John E. Bowers,et al.  High-speed InGaAsP constricted-mesa lasers , 1986 .

[7]  D. Welford,et al.  A rate equation analysis for the frequency chirp to modulated power ratio of a semiconductor diode laser , 1985, IEEE Journal of Quantum Electronics.

[8]  Ivan P. Kaminow,et al.  High-frequency characteristics of directly modulated InGaAsP ridge waveguide and buried heterostructure lasers , 1984 .

[9]  P. J. Corvini,et al.  Studies of high-bit-rate dispersive optical-fiber transmission using single-frequency lasers , 1986 .

[10]  G. Agrawal,et al.  Computer simulation and noise analysis of the system performance of 1.55-µm single-frequency semiconductor lasers , 1987 .

[11]  T. Koch,et al.  Nature of wavelength chirping in directly modulated semiconductor lasers , 1984 .

[12]  Giancarlo Pirani,et al.  Error probability in optical fiber transmission systems , 1979, IEEE Trans. Inf. Theory.

[13]  F. Grund.  Forsythe, G. E. / Malcolm, M. A. / Moler, C. B., Computer Methods for Mathematical Computations. Englewood Cliffs, New Jersey 07632. Prentice Hall, Inc., 1977. XI, 259 S , 1979 .

[14]  T. Muoi.  Receiver design for high-speed optical-fiber systems , 1984 .

[15]  Y. Yoshikuni,et al.  Optimum operation of DFB lasers under chirped pulse transmission , 1985 .

[16]  Joe C. Campbell,et al.  Multigigabit-per-second avalanche photodiode lightwave receivers , 1987 .

[17]  P. J. Corvini,et al.  Computer simulation of high-bit-rate optical fiber transmission using single-frequency lasers , 1987 .

[18]  W. Hauk,et al.  The Calculation of Error Rates for Optical Fiber Systems , 1978, IEEE Trans. Commun..