DETERMINATION OF OPTIMUM REFLECTANCE OF OUTPUT COUPLER IN NANOSECOND SINGLY-RESONANT OPTICAL PARAMETRIC OSCILLATOR

作者：Ahn Wha Keun^*; Rhee Bum Ku; Cha Myoungsik

来源：Journal of Nonlinear Optical Physics and Materials, 2011, 20(2): 145-153.

DOI：10.1142/S0218863511005930

• Nanosecond optical parametric oscillator
• singly-resonant OPO
• reflectivity of output coupler
• conversion efficiency of output
• double-pass pump
• numerical simulation
• beam propagation
• Fast Fourier transform

We investigated the signal output efficiency of a singly-resonant ns-optical parametric oscillator based on LiNbO(3) with the double-pass pump as a function of reflectance (R) of the output coupler. The measured signal output exhibited a broad maximum around R similar to 35% at a fixed pump energy of 100 mJ/pulse, yielding a maximum signal output efficiency of similar to 38%. The experimental results were well-supported by the numerical calculation using a split-step beam propagation model. We also found that the same beam propagation model with one-dimensional diffraction predicts nearly the same results, enabling fast numerical determination of the optimum reflectance of the output coupler.

• 出版日期2011-6