半非平面单块激光器快速频率调谐的实验研究  

Experimental Investigation of Fast Frequency Tuning on Monolithic Semi-Nonplanar Ring Lasers with PZT

作　　者：臧二军[1] 曹建平[1] 李成阳[1] 李晔[2] 李文博[2] 

机构地区：[1]中国计量科学研究院量子部,北京100013 [2]北京交通大学物理系,北京100044

出　　处：《中国激光》2004年第8期931-934,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金 (编号 :6 0 1780 0 9)资助项目

摘　　要：在半导体激光器抽运的Nd∶YAG晶体半非平面单块固体环形激光器上 ,采用粘贴压电陶瓷 (PZT)的方法实现了快速激光频率调谐。对尺寸为 13mm× 14mm× 3mm的单块激光器粘贴了厚度为 0 5mm压电陶瓷 ,并观测两台单块激光器之间的拍频信号。当调制频率小于 10 0kHz时 ,对压电陶瓷施加峰值为 5V的正弦调制信号 ,可观测到大于 10MHz的马鞍形展宽拍频信号 ,对应的PZT调谐系数大于 1MHz/V。当调制信号频率过高时 ,例如频率大于 10 0kHz,拍频信号变得非常不稳定 ,说明激光频率产生了明显的漂移 ,且拍频信号展宽的形状也发生了变化 ,拍频信号的中心部分由凹陷变为凸起。实验观测到的调制响应带宽约为 10 0kHz。Fast frequency tuning of diode pumped monolithic semi nonplanar ring lasers was investigated experimentally using a piezoelectric transducer (PZT). A 0.5 mm thick PZT plate was affixed to a monolithic laser crystal with dimensions of 13 mm×14 mm×3 mm. Beat frequency between two monolithic lasers was observed to check the frequency tuning effect. When the modulation frequency was lower than 100 kHz and the frequency tuning amplitude was 5 V, a widened beat signal could be observed, which gave a PZT tuning coefficient over 1 MHz/V. If the modulation frequency was much higher, such as higher than 100 kHz, the beat signal became unstable and shifted obviously. The shape of the beat signal changed too. Thus the PZT response bandwidth was near 100 kHz for a stable laser frequency tuning.

关 键 词：激光技术 ND:YAG激光器 单块激光器 激光频率调谐 

分 类 号：TN248.13[电子电信—物理电子学] TN242