Method on improving the performance of the optical phased array with large number of emitting elements

Ronglei Han; Jianfeng Sun; Peipei Hou; Hongyu He; Weijie Ren; Haisheng Cong; Longkun Zhang

doi:10.1117/12.2567867

22 August 2020 Method on improving the performance of the optical phased array with large number of emitting elements

Ronglei Han, Jianfeng Sun, Peipei Hou, Hongyu He, Weijie Ren, Haisheng Cong, Longkun Zhang

Proceedings Volume 11506, Laser Communication and Propagation through the Atmosphere and Oceans IX; 115060S (2020) https://doi.org/10.1117/12.2567867
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Conference Poster

Abstract

In an optical phased array (OPA) free space laser communication system, one of the main issues is to control the phase of each beam to acquire fast and stable phase-locking for phase consistency, in which the number of the elements in the array is of vital importance. In this paper, we studied the method on improving the performance of phase-locking about speed and stability of optical phased array with large number of elements. The performance of OPA with different number of emitting elements was analyzed with the simplified stochastic parallel gradient descent (SPGD) algorithm for closed-loop phase-locking. And the algorithm showed a poor performance when the elements of the array were in large amounts. An optimal algorithm, the distributed SPGD (DSPGD) algorithm, was proposed to improve the performance of the array, which revealed fast speed and stability in phase-locking of a large number of emitting elements of optical phased array, suggesting the algorithm is effective.

Citation Download Citation

Ronglei Han, Jianfeng Sun, Peipei Hou, Hongyu He, Weijie Ren, Haisheng Cong, and Longkun Zhang "Method on improving the performance of the optical phased array with large number of emitting elements", Proc. SPIE 11506, Laser Communication and Propagation through the Atmosphere and Oceans IX, 115060S (22 August 2020); https://doi.org/10.1117/12.2567867

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