摘要
文中详细介绍了一种半导体激光器高频调制的设计方案并给出了实验结果,设计了基于直接数字合成技术的高精度三频调制信号产生电路,同时该电路还为后续差频测相提供高稳定的本振信号;该方案能实现对半导体激光器150kHz,15MHz,150MHz三个频点的电流调制,消除了温度对激光器调制特性的影响,在各个频点均达到了很高的频率稳定性,并能实现测尺频率的迅速切换,为相位法激光测距测程和精度的进一步提高奠定了良好的基础。
A new design on high frequency amplitude modulation of laser diode is proposed. The circuits which can produce high precision modulation signal is designed based on direct digital synthesizer （DDS） ,the circuits can also produce local oscillator signals at the same time. The whole design can implement the amplitude modulation of laser diode at the frequency of 150kHz, 15MHz, 150MHz with high stability and perform the swift switch between the different frequencies,which pave the way for high precision and wide range length measurement.
出处
《激光与红外》
CAS
CSCD
北大核心
2007年第11期1174-1177,共4页
Laser & Infrared
