Fig. 1. Polarization structure and phase mismatch of MgO:APLN.MgO:APLN的极化结构和相位失配量

Fig. 2. Schematic diagram of external cavity MOPO.外腔MOPO示意图

Fig. 3. Output waveform simulation of multi-optical parametric amplifier when the pump energy is 2.25 mJ (a), (b) or 10 mJ (c), (d)多光参量放大器输出波形　(a), (b)抽运光能量为2.25 mJ; (c), (d)抽运光能量为10 mJ

Fig. 4. Output waveform simulation of external cavity MOPO with different output transmittance: (a) M4-1 (1.47 μm@T = 80%); (b) M4-2 (1.47 μm@T = 60%); (c) M4-3 (1.47 μm@T = 40%); (d) M4-4 (1.47 μm@T = 20%). 不同输出透过率下外腔MOPO输出波形　(a) M4-1 (1.47 μm@T = 80%); (b) M4-2 (1.47 μm@T = 60%); (c) M4-3 (1.47 μm@T = 40%); (d) M4-4 (1.47 μm@T = 20%)

Fig. 5. Conversion efficiency simulation values of external cavity MOPO with different output transmittance: (a) Output 1.57 μm parametric light; (b) output 3.84 μm parametric light.不同输出透过率下外腔MOPO转换效率模拟值　(a)输出1.57 μm参量光; (b) 输出3.84 μm参量光

Fig. 6. Conversion efficiency simulation values of external cavity MOPO with different crystal length: (a) Output 1.57 μm parametric light; (b) output 3.84 μm parametric light.不同晶体长度下外腔MOPO转换效率模拟值　(a)输出1.57 μm参量光; (b) 输出3.84 μm参量光

Fig. 7. Conversion efficiency simulation values of external cavity MOPO with different cavity length: (a) Output 1.57 μm parametric light; (b) output 3.84 μm parametric light.不同谐振腔长度下外腔MOPO转换效率模拟值　(a)输出1.57 μm参量光; (b) 输出3.84 μm参量光

Fig. 8. Output power and conversion efficiency of external cavity MOPO with different output transmittance: (a) M4-1 (1.47 μm@T = 80%); (b) M4-2 (1.47 μm@T = 60%). 不同输出透过率下外腔MOPO输出功率及转换效率　(a) M4-1 (1.47 μm@T = 80%); (b) M4-2 (1.47 μm@T = 60%)

Fig. 9. Output power and conversion efficiency of external cavity MOPO with different cavity length: (a) Cavity length of 160 mm; (b) cavity length of 180 mm.不同谐振腔长度下外腔MOPO输出功率及转换效率　(a)腔长160 mm; (b)腔长180 mm