摘要
本文较详细地实验研究了腔内 Cd Te电光调 Q CO2 脉冲激光及其外差信号的时域频域特性 ,其激光脉冲时域波形长的拖尾被发现 .如果脉冲很弱 ,无法直接探测信号 .而在这种条件下用外差检测方法 ,就可以探测到较强的脉冲拖尾外差中频信号 ,且拖尾持续时间很长 .同时 ,讨论了在激光外差探测中本振和主振激光间偏频控制的可能性 .
In this paper,the properties of time and frequency domain of pulsed CO 2 laser difference frequency signals are in detail investigated experimentally.The long pulse trailing is found in Q-switched CO 2 laser with CdTe electrooptic modulator.If it is very weak,the pulse signals can hardly be received through direct detection.In this case,the strong difference frequency signals from pulse trailing will be received and the retention time will be much longer if heterodyne detection is used.At the same time,the possibility of controlling offset frequency between transmitter and local oscillator light in pulse laser heterodyne is discussed.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2001年第8期949-952,共4页
Acta Photonica Sinica
