Abstract

The coupling resonance between pumping and firing rates is originally proposed to achieve the timing jitter reduction of a ${\rm Nd}:{\rm YVO}_4$ laser passively $ Q $-switched with a saturable absorber. When the pumping rate is higher than the spontaneous emission rate, it is experimentally confirmed that the pulse firing rate can be fractionally locked with the pumping rate by controlling the pump power. The locking characteristics of the firing rate display a variety of complex plateaus that can be excellently manifested with the sine-circle map. From numerical analyses, the coupling strength can be verified to be effectively enhanced by reducing the duty cycle of the pumping rate.

© 2020 Optical Society of America

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