Abstract
An exciting array of new, ultrashort pulse lasers is expanding the capabilities of ultrafast technology. These lasers are made possible by new passive mode-locking methods that utilize the refractive-index nonlinearities of solid-state materials, rather than the nonlinear loss of saturable absorbers. Although the different techniques for converting a reactive nonlinearity into a pulse shaping dynamic vary in name (such as additive-pulse mode-locking, coupled-cavity mode-locking, and Kerr-lens mode-locking) as well as in implementation (to lasers of Ti:sapphire, Nd:YAG, Nd:YLF, F-centers, and doped fibers), they are now beginning to be understood in the context of a general mode-locking theory.
© 1992 Optical Society of America
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