Mode locking by a frequency-doubling crystal: generation of transform-limited ultrashort light pulses.
Transform-limited ultrashort green and infrared light pulses have been generated from a Nd:YAG laser mode locked by an intracavity second-harmonic crystal in combination with a dichroic output coupler. The mode-locking process is based on substantial reconversion of the second-harmonic radiation back into fundamental radiation after reflection by the dichroic mirror. With this technique light pulses as short as 45 psec have been generated.
Stankov
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