Timing-jitter measurements in optically generated subpicosecond pulses by a quantum-dash passively mode-locked semiconductor laser as a function of the bias current are reported. All the measurements are retrieved from a second-harmonic-generation frequency-resolved optical gating system. A decreasing trend in the pulse width and the associated timing jitter is found with the bias current. Additionally, the optical and mode-beating linewidths are analyzed in terms of both the mode wavelength and the bias current. From our results, we can conclude that once the optical modes are phase locked, the optical linewidth associated to every individual longitudinal mode of the device under test does not have a significant impact on the mode-beating signal on neither the pulse width nor its respective timing jitter.
© 2010 Optical Society of America
Lasers and Laser Optics
Original Manuscript: December 22, 2009
Revised Manuscript: February 26, 2010
Manuscript Accepted: February 27, 2010
Published: April 13, 2010
Ramón Maldonado-Basilio, Josué Parra-Cetina, Sylwester Latkowski, and Pascal Landais, "Timing-jitter, optical, and mode-beating linewidths analysis on subpicosecond optical pulses generated by a quantum-dash passively mode-locked semiconductor laser," Opt. Lett. 35, 1184-1186 (2010)