1.319μm声光锁模器的研制

Research and Manufacture of 1.319μm Acouto-optic Mode Locker

主要研究了工作于1.319μm波长的声光锁模器。介绍了声光锁模器的工作原理是通过在激光腔中插入周期性的调制损耗来获得高峰值功率窄脉宽的激光输出。在设计上从工作频率入手阐述了可调频率合成补偿的方法满足超声驻波,并给出了衍射效率指标和需要的驱动功率的计算过程,以及锁模器的研制在选材和加工上的注意事项。最后通过直接数字频率合成(DDS)方式的驱动源消除了低频调制杂波干扰,获得了良好波形的脉冲输出。

This paper reports the development of the acousto-optic mode-locker that works at 1. 319 μm. The working principle of the acousto-optic mode-locker is introduced. Through inserting a periodicity modulate-waste in the laser cavity,a laser outpur with high peak-value power and narrow pulse widtr has been obtained. Acomposite compensating method through adjusting frequency to satisfy the ultrasonic standing-wave is presented. The processor calculating the diffraction efficiency and the demand power are given. Some considerations about the material selection and machining in developing the acousto-optic mode-locker has been introduced. The disturbance of low-frequency modulating mixed wave has been eliminated by DDS driver and a pulse output with good waveform has been obtained.