Abstract
In recent years, passive mode-locking has experienced a renaissance as a result of new mechanisms based on the Kerr effect. The nonlinear self-phase modulation produced by the Kerr effect is transformed into an amplitude modulation, resulting in nonlinear amplitude modulation. This process simulates saturable absorber action. The schemes have come to be known as coupled cavity mode-locking (CCM),1,2 additive pulse mode-locking (APM),2 and Kerr lens mode-locking (KLM).3 The former two are closely related, except that the APM principle is more general, since it applies to mode-locking in one single cavity.
© 1993 Optical Society of America
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