Combination of Transverse Mode Selection and Active Longitudinal Mode-Locking of Broad Area Semiconductor Lasers
Figure 4
Temporal sequence of mode-locked pulses (black line), while the BAL is running on the fundamental transverse mode. Pulses with an FWHM of as low as 88 ps emerge. The interval of 1004 ps correlates to a modulation frequency of 996 MHz. A sech2 fit to the measured data is also given (red line).
