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文中介绍了一种新型低成本、抗冲击、窄脉宽且自带驱动电路的脉冲半导体激光二极管。该激光二极管采用了一种基于环氧树脂材料的椭球形光束整形透镜对出射的激光光束进行整形。该透镜的设计既满足了激光二极管对体积的要求,同时也简化了封装的步骤且节约了成本。为了缩小体积,减小电路中的寄生效应对窄脉宽信号的影响,该激光二极管采用裸芯代替了常用的独立封装芯片,以多芯片模块的方式制作了驱动电路,并采用金属支架作为散热和信号输入的引脚。激光二极管制作完成后,采用驱动电路对激光二极管进行了测试。实验结果显示该激光二极管在快轴方向的发散角约为1.1°,在慢轴方向发散角约为3.3°,其脉宽可以达到50 ns以下,峰值功率可达35 W。
In this paper, a new low-cost, impact-resistant, narrow pulse width and self-driving pulse semiconductor laser diode. The laser diode uses an ellipsoidal beam shaping lens based on epoxy to shape the outgoing laser beam. This lens is designed to meet the laser diode size requirements, but also simplifies the packaging steps and save costs. In order to reduce the volume and reduce the influence of the parasitic effect in the circuit on the narrow pulse width signal, the laser diode replaces the commonly used independent package chip with the bare chip, and the driving circuit is fabricated in the manner of multi-chip module, and the metal bracket is used as the heat sink And signal input pin. Laser diode production is completed, the use of the drive circuit of the laser diode was tested. Experimental results show that the laser diode has a divergence angle of about 1.1 ° in the fast axis direction and a divergence angle of about 3.3 ° in the slow axis direction. The pulse width of the laser diode can reach 50 ns or less and the peak power can reach 35W.