摘要
随着高功率激光技术的发展,目前的以高功率反射式变形镜为核心的波前校正装置只能通过增大口径来避免反射面损伤,还难以解决连续工作加热时的镜面形变问题。本文拟采用低功率变形镜在信号光阶段进行预补偿,达到高功率激光光束质量校正的效果。首先介绍了高能信号光预补偿技术的补偿原理、方法,然后在板条固体激光器输出功率分别为30W和3000W时进行了波前补偿实验,通过预补偿方法激光远场光束质量得到明显的改善和提高:在激光器输出功率为30W时,光束质量从β=10提高到β=15;在激光器输出功率为3000W时,光束质量从β=10提高到β=3,此外,本文还对非平面波前的信号光传输技术以及信号光预补偿技术的校正策略开展了相应的研究与试验。与传统的自适应光学校正方法相比,信号光预补偿技术可以从根本上摆脱强激光对变形镜的加热和损伤问题,无限的扩展了光束净化系统的功率限制。
With the development of high power laser technology,the current wavefront correction device with high power reflective deformable mirror as the core of the wavefront correction device can only avoid the damage of the reflective surface by increasing the aperture,and it is difficult to solve the problem of mirror deformation during continuous work.In this paper,a low power deformable mirror is used to pre compensate in the signal light stage to achieve the effect of high power laser beam quality correction.Firstly,the compensation principle and method of the high energy signal optical pre compensation technology are introduced.Then,the wavefront compensation experiment is carried out when the output power of the slab solid laser is 30 W and 3000 W respectively.Through the pre compensation method,the far field beam quality of the laser is significantly improved and enhanced.When the output power of the laser is 30 W,the beam quality is improved fromβ=10 toβ=1.5;When the laser output power is 3000 W,the beam quality increases fromβ=10 toβ=3.In addition,the corresponding research and experiments on the signal optical transmission technology of non plane wavefront and the correction strategy of signal optical pre compensation technology are carried out.Compared with the traditional adaptive optical correction methods,the signal light pre compensation technology can fundamentally get rid of the heating and damage problems of deformable mirrors caused by intense lasers,and infinitely expand the power limit of the beam cleaning system.
作者
王钢
刘磊
王文涛
吕华昌
赵鸿
WANG Gang;LIU Lei;WANG Wen-tao;LV Hua-chang;ZHAO Hong(Key Laboratory of Solid State Laser Technology,Beijing 100015,China)
出处
《激光与红外》
CAS
CSCD
北大核心
2023年第9期1344-1349,共6页
Laser & Infrared
