摘要
报道了一台二极管泵浦种子注入Tm,Ho:YAP激光器。在重复频率100 Hz时,获得了单脉冲能量2.8 mJ、脉冲宽度289 ns的2.13μm单频脉冲激光输出。利用该种子注入Tm,Ho:YAP激光器作为发射光源,以一个最大标称线速度20.4 m/s、直径10 cm的风扇作为模拟探测目标,通过外差式相干探测的方法进行了激光多普勒测速实验。利用本振光与信号光的激光拍频信号,得到包含模拟探测目标速度信息的多普勒频移,通过数据处理计算出了风扇不同转速条件下模拟探测目标的速度,并与模拟目标的实际速度进行了比对,测量速度误差小于1 m/s。
A diode-pumped injection-seeded Tm,Ho：YAP laser was reported.The output singlefrequency pulse energy of 2.8 mJ at pulse repetition frequency of 100 Hz with a pulse width o f 289 ns was obtained.Using the injection-seeded Tm,Ho：YAP as the emission source,a laser Doppler velocity measurement experiment by means of heterodyne coherent detection was demonstrated.The detecting target was an air fan with diameter of 10 cm and the maximum linear velocity of 20.4 m/s.The Doppler frequency shift,carrying the velocity information of the air fan,was achieved from heterodyne signal between the local oscillator and the scattering light from the air fan.Under various velocity conditions, the linear velocity of the air fan was achieved from the experimental data.Compared with the actual speed of the air fan,the measurement error of experiment was less than 1 m/s.
出处
《红外与激光工程》
EI
CSCD
北大核心
2013年第2期344-348,共5页
Infrared and Laser Engineering
关键词
激光多普勒测速
激光技术
相干探测
种子注入
laser Doppler velocity measurement
laser technology
coherent detection
injection-seeded
