Research on compensation technology for high power laser wavefront aberration with freeform surface mirror
For a laser with stable performance,the entire system is in a stable state of heat exchange during the work-ing status,that is,the laser wavefront aberration can remain stable and unchanged.Based on this feature,the fabrica-tion of free-form mirrors is proposed to correct the wavefront aberration of the laser and improve the beam quality.Firstly,the wavefront compensation principle,design and manufacturing process of the free-form surface mirror are in-troduced,then its wavefront compensation ability is theoretically simulated through mathematical modeling,and finally the wavefront compensation experiment is carried out in the slab solid laser.The result is that the free-form surface mirror improves the laser beam phase and far-field beam quality at an output power of 12.5 kW.Unlike anamorphic mirrors,free-form mirrors are not constrained by actuator spacing,and are therefore more effective at correcting higher-order aberrations,are less expensive,and do not add to the complexity of the system,each of which has its own advan-tages over an adaptive optics system.
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