Abstract

Continous-wave operation of many longtudinal modes in a unidirectional ring cavity containing a laser medium and a saturable absorber is investigated. The phases of the modes are assumed to be randomly distributed. The system is described by a set of rate equations including noise terms from both media. The steady-state total intensity (as an average value) and the linewidth of the laser output are calculated for the region where bistable operation and hysteresis can occur. Moreover, the hysteresis cycles of individual modes are studied.

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