A colliding-pulse mode-locked ring dye laser with Coumarin 102 passively mode locked by 3,3'-diethyloxacarbocyanine iodide has been developed. Pulses of less than 100-fsec duration have been obtained from 493 to 502 nm at a repetition rate of 160 MHz. A similar operation has also been obtained with alternative saturable absorbers.
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French et al. (1988) studied this question.
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