Beam Shaping Used to Improve the Power Efficiency of a Two-Cassegrain-telescope Configuration Optical System
H. Wu, Xin Li, S. Shen, Z. Huang, H. Wang, X. Xu, Z. Sun and R. Xiao
Serious power losses degrade system performances of optical systems with the two-Cassegrain-telescope configuration seriously. How to improve power efficiency of the optical system has become a lively area of scientific research. In the present paper, beam shaping used to improve power efficiency of the optical system was studied. A typical model of the optical system with the two-Cassegrain-telescope configuration was established, theory of beam propagation through the optical system under different working modes was analysed, and principle of beam shaping with the stochastic parallel gradient descent algorithm was introduced in detail. Under the H-V 5/7 turbulence model, performance of beam propagation through an optical system with determinate parameters was simulated. Results showed that the power efficiency of the optical system can be significantly improved by beam shaping. The present paper provides a good reference for optical systems with the two-Cassegrain-telescope configuration.
Keywords: Two-Cassegrain-telescope, beam shaping, beam propagation, optical system, power efficiency