Abstract
A doubly resonant sum frequency mixing laser at 636 nm with a maximum output power of 637 mW is demonstrated. The conversion efficiency of signal laser reaches 93% by optimizing the sum frequency mixing setup. Based on this high conversion efficiency, we realize the intensity noise self-suppression effect. Experimental results show that even the power fluctuation of pump power was modulated up to 7.8%, the power stability of 636 nm laser kept under 0.6% The simulation results based on the exact solution of the coupled wave equations and cavity enhancement theory can explain the reason and property of the intensity noise self-suppression. Our results may find potential applications in the frequency conversion of the quantum squeezed states, imaging and cold atom physics.
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