Stable, multi-wavelength, high peak power, passively Q-switched Raman lasers based on Yb:YAG/Cr 4+ :YAG composite crystal and c -cut YVO 4 crystal have been demonstrated under quasi-continuous-wave laser diode end-pumping. A Raman laser with a pulse energy of 50 μ J and a pulse width of 0.88 ns is obtained. The corresponding pulse peak power reaches 56.9 kW, which to our best knowledge is the highest peak power achieved in intracavity Raman lasers with Yb 3+ ion-doped crystals as the gain medium. Stable pulse trains of the fundamental lasers and Raman lasers were achieved at different pump pulse energies. These findings have potential applications in nonlinear frequency conversion, photodynamic therapy, industrial processing and terahertz wave generation.

中文翻译：

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基于Yb：YAG / Cr 4+：YAG复合晶体的高峰值功率，多波长，无源调Q拉曼激光器

在准连续波激光二极管端泵浦下，已经证明了基于Yb：YAG / Cr 4+：YAG复合晶体和c切割YVO 4晶体的稳定，多波长，高峰值功率的无源Q开关拉曼激光器。 。获得具有50μJ的脉冲能量和0.88 ns的脉冲宽度的拉曼激光器。相应的脉冲峰值功率达到56.9 kW，据我们所知，这是在以Yb 3+离子掺杂晶体作为增益介质的腔内拉曼激光器中实现的最高峰值功率。在不同的泵浦脉冲能量下，基本激光器和拉曼激光器的脉冲序列稳定。这些发现在非线性频率转换，光动力疗法，工业加工和太赫兹波产生中具有潜在的应用。