【摘要】 实现了重复频率高达105 kHz的紧凑的全固态声光(A-O)调Q 532 nm腔内倍频激光器。激光器使用Nd∶YVO4作为激光晶体,Ⅱ类匹配的KTP为倍频晶体,声光器件材料为熔融石英,由自制的声光驱动器驱动,其最大射频输出功率为7.5 W,重复频率1 Hz~105 kHz可调。使用1 W的激光二极管(LD)抽运,50 kHz重复频率下,得到平均功率达224 mW的532 nm脉冲激光稳定平均输出,总光光转换效率高达22.4%。低重复频率下,可以实现脉宽为17.2 ns,峰值功率为470 W,单脉冲能量为8.1μJ的稳定运转。给出了平均功率与重复频率关系的一般公式,并提出即使是在四能级系统中,有效储能时间也并不等于上能级寿命,理论计算结果与实验结果吻合得很好。更多还原

【Abstract】 A compact, all solid-state and high repeti ti on rate as up to 105 kHz acousto-optic (A-O) Q-switched intracavity frequ ency-doubled 532 nm laser is demonstrated. A Nd∶YVO 4 crystal is used a s active media and a type-Ⅱ KTP (KTiPO 4) as frequency doubler, The Q switcher is made by fused silica and driven by a driver whose maximal rf outpu t power is 7.5 W and repetition rate is variable from 1 Hz to 105 kHz, which is made by our own. 224 mW of 532 nm average power at a repetition rate of 50 kHz w as generated with a 1 W laser diode (LD) as pump source, and a high optical-to-o ptical conversion efficiency of 22.4% was obtained. Under low repetition rate, s teady operation is achieved with pulse width of 17.2 ns, peak power of 470 W and single pulse energy of 8.1 μJ. A general formula of average-power as a functi on of pulse repetition rate is presented which has good agreement with the exper iment results. Analysis and experimental verification showed that, even in four -level system, the effective storage time is not equal to the upper state lifet ime.更多还原