Efficient Diode-End-Pumped Actively Q-Switched Nd:YLF/SrWO₄ Raman Laser

An efficient diode-end-pumped actively Q-switched Nd:YLF/SrWO₄ Raman laser is demonstrated. The fundamental wave is 1047.0 nm and the corresponding first-Stocks wave is 1158.7 nm. With a pumping power of 10.5 W, the average output power of 2.2 W at 1158.7 nm is obtained, with the corresponding optical conversion efficiency of 20.9%. At a repetition rate of 6 kHz, the pulse width of the Raman laser is 8.7 ns and the peak power is calculated to be 42.1 kW. The beam quality factors M² in horizontal and vertical directions are 1.3 and 1.5, respectively.