High-power, high-energy Ho:YAG oscillator pumped by a Tm-doped fiber laser

• DOI: 10.3788/col201513.121402
• Publication Date: 2015-12-23T00:42:41Z
• Authors: Encai Ji Encai Ji; Qiang Liu Qiang Liu; Zhenyue Hu Zhenyu...; Ping Yan Ping Yan; and Mali Gong and...
• Keywords: Slope efficiency

A high-power, high-energy Ho:YAG oscillator resonantly pumped by a Tm-doped fiber laser is presented. maximum continuous output power of 38 W with slope efficiency 51.9% achieved at the wavelength 2.09 μm, and M2≈1.48. In Q-switching regime, pulse energy 12.8 mJ, corresponding to 514.5 kW peak power, obtained repetition frequency 1 kHz. Furthermore, thermal lens effect system studied theoretically, radius transverse electromagnetic (TEM00) mode crystal under different pump powers given.