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首页> 外文期刊>Optical and quantum electronics >Investigation of a passively Q-switched Raman laser at 1176 nm with Nd~(3+):YAG/Cr~(4+):YAG/YAG composite crystal and a coupled cavity
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Investigation of a passively Q-switched Raman laser at 1176 nm with Nd~(3+):YAG/Cr~(4+):YAG/YAG composite crystal and a coupled cavity

机译：Nd〜（3 +）：YAG / Cr〜（4 +）：YAG / YAG复合晶体和耦合腔在1176 nm被动调Q拉曼激光器的研究

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摘要

To reduce the thermal lens effect and increase the efficiency, a composite crystal of Nd3+:YAG/Cr4+:YAG/YAG and a coupled cavity structure were employed in our passively Q-switched YVO4-based Raman laser system. Both the simulation and the experiment results showed that the undoped YAG crystal bonded in the end-face of Cr4+:YAG crystal can speed up the heat transfer of Cr4+:YAG crystal and reduce the temperature difference between its side surfaces and the center significantly, and the coupled cavity structure can improve the laser performance, especially at high pump power. The maximum output power of Raman laser of 0.92 W at 1176 nm was obtained with an optical-to-optical efficiency of 11.51%. The corresponding repetition rate and the pulse width is 53.5 kHz and 3.22 ns, respectively.
机译：为了降低热透镜效应并提高效率，我们在被动调Q的YVO4基拉曼激光系统中采用了Nd3 +：YAG / Cr4 +：YAG / YAG复合晶体和耦合腔结构。仿真和实验结果均表明，结合在Cr4 +：YAG晶体端面的未掺杂YAG晶体可以加快Cr4 +：YAG晶体的传热速度，并显着减小其侧面与中心之间的温差，并且耦合腔结构可以改善激光器性能，特别是在高泵浦功率下。获得的拉曼激光在1176 nm处的最大输出功率为0.92 W，光-光效率为11.51％。相应的重复率和脉冲宽度分别为53.5 kHz和3.22 ns。

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