论文部分内容阅读
为了抑制掠入射板条激光器晶体内部自激振荡,提出了在增益介质非通光表面涂覆近红外吸波材料—Ge的方法。实验对比了有Ge涂层与无Ge涂层的Nd:YAG晶体模块分别在自由振荡和被动调Q振荡条件下的激光输出特征。实验表明,在自由振荡条件下,有Ge涂层的晶体模块谐振腔激光输出阈值(54A)小于无Ge涂层晶体模块振腔激光输出阈值(59A),当泵浦电流为68A时,前者相对于无锗涂层晶体模块输出能量提高了51%;在被动调Q条件下,有Ge涂层的晶体模块谐振腔激光输出阈值(63.5A)小于无Ge涂层晶体模块谐振腔激光输出阈值(65A),当泵浦电流为67A时,前者相对于后者输出脉冲能量提高了75%。实验结果表明,Ge涂层能有效地抑制自激振荡,降低激光输出阈值并大幅提高输出脉冲能量。
In order to suppress the self-oscillation of grazing incidence slab laser crystal, a method of coating near-infrared absorbing material -Ge on the non-passing surface of the gain medium is proposed. The laser output characteristics of the Nd: YAG crystal module with and without Ge coating were compared under free-oscillation and passive Q-switching respectively. Experiments show that under the condition of free oscillation, the laser output threshold (54A) of the crystal module with Ge coating is smaller than that of the laser output without the Ge-coated crystal module (59A). When the pump current is 68A, The output power of the crystal module with Ge coating is 51% higher than that of the Ge-coated crystal module with passive Q-switched. 65A), when the pump current is 67A, the former output pulse energy is increased by 75% compared with the latter. The experimental results show that the Ge coating can effectively suppress the self-oscillation, reduce the laser output threshold and greatly increase the output pulse energy.