Nh. Rizvi et al., GENERATION OF PULSES AS SHORT AS 93 FS FROM SELF-STARTING FEMTOSECONDCR-LISRALF6 LASERS BY EXPLOITING MULTIPLE-QUANTUM-WELL ABSORBERS, Optics letters, 18(12), 1993, pp. 983-985
A Cr:LiSrAlF6 laser has been mode locked by using a multiple-quantum-w
ell (MQW) absorber. With the MQW absorber inside the laser cavity, Ker
r lens mode locking is initiated, yielding transform-limited pulses as
short as 93 fs. Pulses of 500-fs duration have also been produced by
using resonant passive mode locking with the MQW absorber in an extern
al cavity.