Sub-20-ps pulses from a passively Q-switched microchip laser at 1 MHz repetition rate.
Sub-20-ps pulses from a passively Q-switched microchip laser at 1 MHz repetition rate.
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DOI：
10.1364/ol.39.002940
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发表时间：
2014-05
期刊：
影响因子：
3.6
通讯作者：
E. Mehner;B. Bernard;H. Giessen;D. Kopf;B. Braun
中科院分区：
文献类型：
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作者：
E. Mehner;B. Bernard;H. Giessen;D. Kopf;B. Braun
报道了一种50 μ mNd ~（3+）：YVO_4微片激光器，该激光器采用半导体可饱和吸收镜实现被动调Q。为了减少小晶体尺寸引起的处理问题，50 μm的Nd 3+：YVO 4晶体光学键合到约500 μm长的未掺杂YVO 4晶体。通过使用有效调制深度>10%的可饱和吸收镜，该系统能够以高达1.0MHz的重复率提供16 ps的脉冲。在1064 nm处的平均激光功率为16 mW。据我们所知，这是有史以来报道的固态激光器中最短的Q开关脉冲。在脉冲宽度，重复频率，输出功率和系统稳定性方面的限制进行了讨论。此外，连续波的行为进行了分析。实验数据与耦合速率方程的模拟结果进行了比较。
We present a 50 μm Nd3+:YVO4 microchip laser that is passively Q-switched by a semiconductor saturable absorber mirror. To reduce handling problems caused by the small crystal dimensions, the 50 μm Nd3+:YVO4 crystal is optically bonded to an undoped YVO4 crystal of a length of about 500 μm. By using a saturable absorber mirror with an effective modulation depth of >10% the system is able to deliver 16 ps pulses at a repetition rate of up to 1.0 MHz. The average laser power is 16 mW at 1064 nm. To our knowledge these are the shortest Q-switched pulses ever reported from a solid-state laser. The limits in terms of pulse width, repetition rate, output power, and system stability are discussed. Additionally, continuous-wave behavior is analyzed. Experimental data is compared with the simulation results of the coupled rate equations.