Abstract
Kerr lens mode-locking Ti:sapphire and Cr:LiSAF has recently received considerable attention as a method of reliably producing tunable femtosecond pulses.1 Attempts to eliminate the large frame Ar+ or Kr+ lasers whose high pump powers are required for the operation of such systems have focused on direct laser diode pumping of Cr:LiSAF. However, the poor beam characteristics of high power red diodes, which prevent accurate mode matching of the pump beam to the Cr:LiSAF laser mode, have, to date, prevented their use in Kerr lens systems.2
© 1994 Optical Society of America
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