Abstract

Additive-pulse mode-locking (APM) leads to the generation of stable ultrashort pulses in a wide variety of solid-state lasers. There has thus been considerable interest in the mechanisms responsible for APM. Theoretical treatments based on the model of interferential reduction of a width of pulse with a given profile owing to a reflection from nonlinear coupled cavity commonly give the estimations of the stable locking interval of cavity mismatch.^1,2 Recently, more complicated dynamics were observed; for example, the THz beating signal with frequency inversely proportional to the length mismatch,³ period doubling and chaos in pulse train at high value of nonlinear phase shift in coupled cavity.⁴ In this paper the results of numerical simulations of different dynamics of APM laser with use of a full set of laser equations⁵ are presented.

© 1994 IEEE