研究目的
Investigating the effectiveness of an over compensation algorithm for laser beam shaping using deformable mirrors.
研究成果
The OC algorithm can achieve its minimum RRMSD value with only a few actuator perturbations, potentially increasing the DM life. However, it does not converge to a fixed RRMSD value, but this may not be a problem since the optimal DM configuration can be retained during the iteration process.
研究不足
The major limitation is that the incident wavefront needs to be small enough so that its influence on the target spot can be compensated. The algorithm becomes less effective for compensating the influence of a large incident wavefront on the focal spot.
1：Experimental Design and Method Selection:
The study employs an over compensation algorithm that models the beam shaping problem using a sequence of standard Monge-Ampère equations and iteratively applies over compensation to the deviated focal-plane irradiance distributions.
2：Sample Selection and Data Sources:
The incident optical field is assumed to be flat to reduce complexity, and the focal-plane irradiance distribution is measured using a CCD camera.
3：List of Experimental Equipment and Materials:
A 37-actuator piezoelectric deformable mirror with specific actuator influence functions is used.
4：Experimental Procedures and Operational Workflow:
The algorithm involves applying over compensation to the deviated focal-plane irradiance distribution, computing the required freeform reflective surface, and determining the weights of the DM actuators.
5：Data Analysis Methods:
The deviation between the desired and tested irradiance distributions is quantified by the relative root mean square deviation (RRMSD).
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