Improving performances of the optical systems with Cassegrain-telescope receivers by using vortex sources and phase optimizations

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.

► We present an effective method to improve performances of the optical systems.
► We establish a typical model of optical systems with Cassegrain-telescope receiver.
► We classify the systems into two types and analyze the evaluating factors.
► We simulate performances of the optical system under the H-V 5/7 turbulent model.