Analysis of Optimization Approaches for a 30 km Altitude Relay Mirror System with Coherent Beams Array
H-Y. Wu, X-J. Xu, J-B. Chen and Y-J. Zhao
Phase optimization and configuration optimization are important parts in the relay mirror system with the source composed of coherent beams array. Model of a 30 km altitude relay mirror system with coherent beams array is established, phase distribution of the source array is optimized by using the stochastic parallel gradient descent algorithm. With this model, the system is theoretically analysed in detail. Under the H-V 5/7 atmospheric turbulence model, performances the relay mirror system with the sources composed of different number of coherent beams are calculated. Results show that the optimal configuration of the relay mirror system using 3.8 mm laser is an array composed of 6 coherent beams, the optimal configuration of the relay mirror system using 1.315 mm laser and 1.064 mm laser is an array composed of seven coherent beams.
Keywords: Relay mirror system, coherent beams array, laser, phase optimization, configuration optimization, atmospheric propagation