Laser power as a function of the level of optical signal synchronization

Changes in the output of a single-frequency laser (decrease, increase, or both) synchronized by a harmonic light signal in varying its level and adjustment in the synchronization band, have been examined theoretically. The technique consists of a combined consideration of the laser power output variation in the autonomous mode taking into account losses in the resonator and a family of synchronization amplitude curves. It is shown that the changes in the laser power output in the synchronization band depend on the fact that the transmission coefficient for the resonator's output mirror tau is different from its optical value tau for which the laser power in the autonomous mode is maximal. When tau is less than tau(0) the growth of the external signal should produce a decrease in the power of the laser synchronized emission in comparison with its value in the autonomous mode, for tau greater than tau (0) an increase in the power and for tau = tau(0), small variations in the power within the limits of the synchronization band. The choice of coefficient tau = tau(0) should lead to a mode limiting the external signal within some adjustment interval in the synchronization band.