MULTIPLE COLLIDING PULSE MODE-LOCKED OPERATION OF A SEMICONDUCTOR-LASER

Multiple colliding pulse mode-locked operation where 3 or 4 ultrashort pulses are present simultaneously within a semiconductor laser is des cribed. Frequency and time domain measurements show that a multisectio ned laser can be switched between two, three, and four pulse operation . In four pulse operation, pulse widths of approximately 1.3 ps at rep etition rates of 240 GHz have been observed from a 600-mum-long laser. (C) 1994 American Institute of Physics.