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Optics & Laser Technology, Volume 45, February 2013, Pages 132-136.
Huiyun Wu, Zhenhai Sun, Jinbao Chen
Department of Science and Technology, Academy of Military Medical Sciences, Beijing 100850, PR China.
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, PR China.
Abstract
We present an effective method to improve performances of the optical systems with Cassegrain-telescope receivers by using vortex sources and phase optimizations. A typical model of optical systems with Cassegrain-telescope receivers is established, theory of beam propagation through the optical system is analyzed and principle of the new method is illuminated in detail. We classify the optical systems with Cassegrain-telescope receivers into two types and analyze the system performance evaluating factors: the first type is that the received beam is converted to signals, and power efficiency of the received beam is used as the system performance evaluating factor; the second type is that the received beam is used as a new source for further propagation after being cleaned up, and the product of power efficiency and beam quality (Strehl ratio) of the received beam is used as the system performance evaluating factor. Under the H-V 5/7 turbulent model, performances of the two systems with vortex sources and phase optimized by the stochastic parallel gradient descent algorithm are calculated. Results show that power efficiency of the received beam in the first type optical system can get 97.86, and the system performance evaluating factor of the second type system can be improved from 0.8560 to 0.9398.
Additional Information
Huiyun Wu received the PhD degree in Optics Engineering from National University of Defense Technology, P.R.China, in 2012. His research interests are vortex beam technology and beam atmospheric propagation.” and “Zhenhai Sun received the PhD degree in Optics Engineering from Anhui Optical Precision Machinery Research Institute of Chinese Academy of Sciences in 2008. His research interests are photobiology technology and information optics.
