调Q激光光折变自适应光外差探测技术研究

基于光折变晶体中自泵浦与互泵浦相位共轭共存效应,利用新型光折变自适应光外差探测系统进行了调Q脉冲激光的光折变自适应光外差探测技术研究.结果表明,该系统可以用来实现单纵模调Q脉冲激光的自适应光外差探测,并可以通过提高本振光强度有效地提高外差探测灵敏度.进一步的实验和理论分析表明,对于一般的调Q脉冲激光,由于其各个纵模频谱分量之间不相关,难于实现光外差探测.

Study on Photorefractive Adaptive Optical Heterodyne Detection Technology with Q-switched Laser

Based on the effect of self-pumped phase conjugation (SPPC) and mutually pumped phase conjugation (MPPC) coexistence,using a new photorefractive adaptive optical heterodyne detection system,the technology of photorefractive adaptive optical heterodyne detection with Q-switched pulse laser is investigated.The result indicates that the adaptive optical heterodyne detection can be achieved with this system with Q-switched single longitudinal mode pulse laser.,and the sensitivity of optical heterodyne detection can be amplified availably by increasing the reference beam intensity.The experiment and theory analysis shown that it is difficult to achieve optical heterodyne detection for general Q-switched pulse laser because the spectrum components of its longitudinal modes have no correlation with each other.