D. Eliyahu et al., EFFECT OF NOISE ON THE POWER SPECTRUM OF PASSIVELY ANODE-LOCKED LASERS, Journal of the Optical Society of America. B, Optical physics, 14(1), 1997, pp. 167-174
We analyze the effects of noise on the power spectrum of pulse trains
generated by a continuously operating passively mode-locked laser. The
shape of the different harmonics of the power spectrum is calculated
in the presence of correlated timing fluctuations between neighboring
pulses and in the presence of amplitude fluctuations. The spectra at t
he different harmonics are influenced mainly by the nonstationary timi
ng-jitter fluctuations; amplitude fluctuations slightly modify the spe
ctral tails. Estimation of the coupling term between the longitudinal
cavity modes or the effective saturable absorber coefficient is made f
rom the timing-jitter correlation time. Experimental results from an e
xternal cavity two-section semiconductor laser ape given. The results
show timing-jitter fluctuations having a relaxation time much longer t
han the repetition period. (C) 1997 Optical Society of America.