A green laser at 517 nm based on intracavity frequency doubling of the diode-pumped Yb:LO laser

Abstract

We report for the first time, to our knowledge, the diode-pumped continuous-wave (CW) thin-disk Yb³⁺-doped Lu₂O₃ (Yb:LO) laser at 1 034 nm and the second-harmonic generation at 517 nm. With a 6.3% output coupler, the maximum output power is 1.17 W under a pump power of 18.5 W. Moreover, the intracavity second-harmonic generation (SHG) is also achieved with power of 193 mW at 517 nm by using an LiB₃O₅ (LBO) nonlinear crystal. The beam quality factor M² is about 1.28. The fluctuation of the output power is about 3% in 1 h.

Keywords

Pump Power / Incident Pump Power / Nonlinear Crystal / Slope Efficiency / Optic Letter

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This work has been supported by the National Natural Science Foundation of China (No.61275135).