Abstract
For many uses relating to time-domain studies in the femtosecond regime there is the requirement of spectral versatility in the mode-locked laser sources. Conventional passive mode-locking schemes involving saturable absorbers, which can severely limit the accessibility to desired operational wavelengths or tuning ranges, tend therefore to be either unduly restrictive or inappropriate. Alternative approaches where nonwavelength-specific intensity-induced non linearities can be readily exploited thus represent more practical and attractive options.
© 1992 Optical Society of America
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