摘要
high-power, high-energy Ho：YAG oscillator resonantly pumped by a Tm-doped fiber laser is presented. A maximum continuous output power of 38 W with a slope efficiency of 51.9% is achieved at the wavelength of 2.09 μm, and M2≈1.48. In the Q-switching regime, the maximum pulse energy of 12.8 mJ, corresponding to a 514.5 kW peak power, is obtained at the pulse repetition frequency of 1 kHz. Furthermore, the thermal lens effect of the system is studied theoretically, and the radius of the transverse electromagnetic（TEM_（00）） mode of the laser crystal under different pump powers is given.
high-power, high-energy Ho：YAG oscillator resonantly pumped by a Tm-doped fiber laser is presented. A maximum continuous output power of 38 W with a slope efficiency of 51.9% is achieved at the wavelength of 2.09 μm, and M2≈1.48. In the Q-switching regime, the maximum pulse energy of 12.8 mJ, corresponding to a 514.5 kW peak power, is obtained at the pulse repetition frequency of 1 kHz. Furthermore, the thermal lens effect of the system is studied theoretically, and the radius of the transverse electromagnetic（TEM_（00）） mode of the laser crystal under different pump powers is given.
基金
supported by the National Natural Science Foundation of China(No.61275146)
the Research Fund for the Doctoral Program of Higher Education of China(No.20120002110066)
the Special Program of Co-Construction with the Beijing Municipal Government of China(No.20121000302)
