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介绍了一台高峰值功率的脉冲红光固体激光器。通过激光晶体和非线性光学晶体的对比与选择,采用掺杂浓度为1at%的b-轴切割的Nd:YAP晶体作为激光增益介质,并通过电光调Q,输出1341.4nm波长的激光脉冲,再选用I类临界相位匹配三硼酸锂(LBO)作为倍频晶体,其匹配角度为θ=86.13°,=0°,进行腔外倍频的实验研究。当1341.4nm电光调Q的基频激光输出能量为126mJ时,获得51.1mJ、脉宽为40ns的670.7nm脉冲倍频红光输出,二次谐波的能量转换效率为40.5%。由于采用电光调Q运行模式,脉宽可窄到40ns,670.7nm红光的峰值功率高达1.277MW,大大拓宽了在激光美容、医学治疗等领域的应用。
A pulsed red solid state laser with high peak power is introduced. By contrast and selection of laser crystal and non-linear optical crystal, b-axis cut Nd: YAP crystal with 1at% doping concentration is used as the laser gain medium, and the laser pulse with the wavelength of 1341.4nm is output by electro-optic Q- Class I critical phase matching lithium triborate (LBO) was chosen as the frequency doubling crystal. The matching angle was θ = 86.13 ° and = 0 °. When the fundamental laser output power of 1341.4nm electro-optic Q-switched Q is 126mJ, a pulse output of 670.7nm with 51.1mJ pulse width and a pulse width of 40ns is obtained. The energy conversion efficiency of the second harmonic is 40.5%. As the use of electro-optic Q mode of operation, the pulse width can be narrow to 40ns, 670.7nm red peak power of up to 1.277MW, greatly expanded in the field of laser beauty, medical treatment and other applications.