We determine the differential refractive-index spectra and the spectral dependence of the α parameter of mode-locked external-cavity semiconductor lasers by analyzing the spectral and temporal dynamics of the residual Fabry–Perot modes present in the temporal-gain spectra, which are measured by an electrical-pump–optical-probe technique. The influence of material and resonator contributions on chirp and pulsewidth performances are discussed.
© 1997 Optical Society of America
P. Miltényi, H. Jung, and W. Elsäßer, "Temporal and spectral refractive-index dynamics of mode-locked external-cavity semiconductor laser diodes," J. Opt. Soc. Am. B 14, 2701-2704 (1997)