Fig. 1. Reinjection OA-ICOS experimental setup.再入射OA-ICOS实验装置光路图

Fig. 2. Distribution of spot on the re-injection mirror M_re with different L and R. 在不同L和R时再入射镜M_re上光斑排布情况

Fig. 3. Distribution of spot on cavity mirror M_out with different L and R. 在不同L和R时腔镜M_out上光斑排布

Fig. 4. Distribution of spot on M_re with different incidence angles. 在不同入射角度时再入射镜M_re上的光斑排布情况

Fig. 5. Gain coefficients of M_out with different L and R. 在不同L和R时M_out截面的增益系数

Fig. 6. Power distribution of M_outM_out能量分布图

Fig. 7. Output signal at different re-injection position L. 在不同再入射位置L时系统输出信号

Fig. 8. Gain comparison between simulation and experiment.模拟与实验增益对比

Fig. 9. Simulation gain of system with different losses.在不同损耗情况下的增益系数模拟结果

Fig. 10. Comparison of absorption spectra of the system.系统吸收光谱对比

Fig. 11. Comparison of system sensitivities: (a) With reinjection; (b) without reinjection.系统灵敏度对比　(a)有再入射; (b)无再入射