Laser characteristics of continuous-wave (cw) and passively Q-switched Nd : LGGG lasers based on the ⁴F_3/2 → ⁴I_13/2 transition of an neodymium ion are investigated. The lasing spectra of the cw and the Q-switching regimes are studied in detail. The thermal optical coefficient for the Nd : LGGG crystal at a wavelength of 1.33 μm is estimated to be 15.3 10⁻⁶ K⁻¹. By inserting a quartz plate at the Brewster angle, the frequency of the Nd : LGGG laser is tuned. In the cw regime, the maximum output power at an incident pump power of 7.09 W is 802 mW and a slope efficiency is 13.2%. In the Q-switching regime, a minimum pulse duration of 9.75 ns is obtained with an output power of 176 mW and a repetition rate of 8 kHz. The maximum pulse energy and the highest peak power are 25.4 μJ and 2.4 kW, respectively.

研究了基于钕离子的⁴ F _3/2 → ⁴ I _13/2跃迁的连续波 (cw) 和被动调Q Nd: LGGG 激光器的激光特性。详细研究了 cw 和Q开关方案的激光光谱。Nd：LGGG晶体在1.33 μm波长处的热光学系数估计为15.3 10 ^-6 K ^-1。通过以布鲁斯特角插入石英板，Nd : LGGG 激光器的频率被调谐。在连续波状态下，入射泵浦功率为 7.09 W 时的最大输出功率为 802 mW，斜率效率为 13.2%。在问- 开关方案，最小脉冲持续时间为 9.75 ns，输出功率为 176 mW，重复频率为 8 kHz。最大脉冲能量和最高峰值功率分别为 25.4 μJ 和 2.4 kW。