封闭充气管道中气体热效应对激光传输的影响

Thermal Effects on Laser Propagating in a Closed Tube with Air

对连续激光在封闭充气管道中传输时的热效应进行了数值计算研究,并与实验情况进行了比对。结果表明,在封闭管道环境下,尽管光束传输距离较短,但由于光束能量密度较高、气流不流通,热效应作用将使光束产生较大发散,而且热效应的时间累积影响严重。

A numerical study was carried out for the thermal effects of laser propagating in a closed tube with air.The calculation results were compared with the experiment ones.It is shown that the thermal effects may significantly degrade the beam quality because of the high laser energy intensity and the hermetic circumstance,although the transfer distance is rather short.Also the cumulate thermal effects in time are definitive.