All-solid-state cw mode-locked picosecond KTiOAsO4 (KTA) optical parametric oscillator
All-solid-state cw mode-locked picosecond KTiOAsO4 (KTA) optical parametric oscillator
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DOI：
10.1007/s003400050541
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发表时间：
1998-11
期刊：
影响因子：
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通讯作者：
B. Ruffing;A. Nebel;R. Wallenstein
中科院分区：
文献类型：
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作者：
B. Ruffing;A. Nebel;R. Wallenstein
4(KTA) 光参量振荡器 (OPO) 由连续波二极管泵浦锁模 Nd:YVO4 振荡器放大器系统同步泵浦。激光系统（由 84 W 连续 808 nm 二极管辐射泵浦）产生 7 ps 长的 1.064 μm 脉冲，重复率为 83.4 MHz，平均功率为 29 W。OPO 由 1.064 μm 激光脉冲同步泵浦，由 15 毫米长的 KTA 晶体（针对 II 型非临界切割）组成。相位匹配）在折叠信号谐振线性谐振器中。 1.54 μm 信号辐射和 3.47 μm 空闲辐射的平均功率分别为 14.6 W 和 6.4 W。 21 W 的 OPO 总输出相当于 75% 的内部效率。实验研究包括测量 OPO 输出功率（及其对泵浦功率、输出耦合器的传输和谐振器长度的依赖性）和脉冲特性（例如脉冲持续时间和频谱宽度）。测量结果与基于分步傅里叶方法的数值分析的预测非常吻合。
4(KTA) optical parametric oscillator (OPO) synchronously pumped by a cw diode-pumped mode-locked Nd:YVO4oscillator–amplifier system. The laser system (pumped by 84 W of cw 808-nm diode radiation) generates 7-ps-long pulses at 1.064 μm with a repetition rate of 83.4 MHz and an average power of 29 W. The OPO, synchronously pumped by the 1.064-μm laser pulses, consists of a 15-mm-long KTA crystal (cut for type II noncritical phase-matching) in a folded signal resonant linear resonator. The average powers of the 1.54-μm signal radiation and the 3.47-μm idler radiation are 14.6 W and 6.4 W, respectively. The total OPO output of 21 W corresponds to an internal efficiency of 75%. The experimental investigations include measurements of the OPO output power (and its dependence on the pump power, the transmission of the output coupler, and the resonator length) and of the pulse properties (such as pulse duration and spectral width). The measured results are in good agreement with the predictions of a numerical analysis based on a split-step Fourier method.