Thermal-induced dephasing in mid-infrared continuous-wave singly resonant optical parametric oscillator

This work is devoted to the study of thermal-induced dephasing in mid-infrared continuous-wave singly resonant optical parametric oscillator(CW-SRO). The thermal-induced dephasing in crystal output section versus pump power and output coupling of signal is calculated. The simulation results indicate that the crystal thermal effect of CW-SRO with 3.3 m idler output is mainly affected by the absorption of the circulating signal power. Under the same input conditions, the CW-SROs thermal-induced dephasing with pump power above 30 W will greatly reduce the pump depletion. The thermal-induced dephasing will reduce with increasing the signal output coupling, while the threshold of CW-SRO will increase.