Broadband Degenerate Femtosecond OPO around 2060 nm

Figure 1

The sketch for the experimental setup of the degenerate OPO. C1 and C2: concave mirrors with ROC of 150 mm; HR: flat mirror with high reflectivity; M1: sliver mirror; PZT: piezo translator; OC1 and OC2: output couplers.