腔长调制引起的激光波前间歇畸变现象

Phenomenon of Laser Wavefront Intermittently Distortion Induced by Adjustment of the Resonant Cavity Length

介绍周期性微调ＣＯ２激光器谐振腔长度引起激光波前间歇畸变的现象，这种现象引起相干式调频连续波激光雷达回波信号带出现凹陷。初步观察表明，这种现象的出现与激光支线有关。在波前畸变时，激光器支线不跃变，横模宏观特征也不变。

The phenomenon of laser wavefront intermittently distortion induced by periodically adjusting the resonent cavity length of a CO 2 laser was observed. It leads to the signal discontinuity of a coherent FM CW laser radar. The preliminary analyses indicate that this phenomenon is connected with the laser branch line. When this distortion occurs, the laser branch line doesn′t shift and the microscopic characteristics of the transverse mode have no change.