We report on a passively Q-switched (PQS) yellow laser emitting at 589 nm by using type-I noncritical phase-matching LBO crystal intracavity frequency-doubled self-Raman laser. A 30-mm-length c-cut YVO₄/Nd:YVO₄/YVO₄ composite crystal was employed to accelerate heat spread as well as enhance the Raman conversion efficiency. By using a Cr⁴⁺:YAG composite crystal with the initial transmission of 83%, a yellow emission with 660 mW average output power was obtained under the absorbed pump power of 17.5 W, corresponding to the diode-to-yellow conversion efficiency of 3.8% and slope efficiency of 8.1%, respectively. The pulse repetition frequency and pulse duration were measured to be 16 kHz and 2.8 ns, respectively, corresponding to the pulse energy of 41.3 μJ and peak power of 14.7 kW. To the best of our knowledge, this is the highest power of PQS yellow laser via intracavity frequency-doubled self-Raman laser.

我们报告了通过使用I型非关键相位匹配LBO晶体腔内倍频自拉曼激光器在589 nm处发射的被动Q开关（PQS）黄色激光器。使用30毫米长的c形切割YVO ₄ / Nd：YVO ₄ / YVO ₄复合晶体来加速散热并提高拉曼转换效率。通过使用Cr ⁴⁺：YAG复合晶体，其初始透射率为83％，在17.5 W的吸收泵浦功率下获得了黄光发射，平均输出功率为660 mW，对应的二极管至黄色转换效率为3.8％，斜率效率为8.1 ％， 分别。测量的脉冲重复频率和脉冲持续时间分别为16 kHz和2.8 ns，对应于41.3μJ的脉冲能量和14.7 kW的峰值功率。据我们所知，这是腔内倍频自拉曼激光器产生的PQS黄色激光器的最高功率。