Performance analysis of a coherent tiled fiber-array beam director with near-field phase locking and programmable control of tip/tilt and piston phases

Grigory A. Filimonov; Mikhail A. Vorontsov; Svetlana L. Lachinova

doi:10.1117/12.2044491

6 March 2014 Performance analysis of a coherent tiled fiber-array beam director with near-field phase locking and programmable control of tip/tilt and piston phases

Grigory A. Filimonov, Mikhail A. Vorontsov, Svetlana L. Lachinova

Author Affiliations +

Proceedings Volume 8971, Free-Space Laser Communication and Atmospheric Propagation XXVI; 897109 (2014) https://doi.org/10.1117/12.2044491
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

The phase noise that originates in the multi-channel master-oscillator power amplifier (MOPA) system of a coherent tiled fiber-array beam director may drastically impact the efficiency of laser beam projection on a remotely located target in the atmosphere. The recently proposed near-field phase locking (NFPL) technique mitigates the MOPA-induced phase noise and gives an opportunity for programmable control of local (on-subaperture) piston and tip/tilt phases of the outgoing fiber-array beams (beamlets). In the present paper, we evaluate the influence of both NFPL and programmable phase control on the beam director performance for different laser beam propagation paths and atmospheric turbulence conditions. Our analysis is based on wave-optics numerical simulation.

Citation Download Citation

Grigory A. Filimonov, Mikhail A. Vorontsov, and Svetlana L. Lachinova "Performance analysis of a coherent tiled fiber-array beam director with near-field phase locking and programmable control of tip/tilt and piston phases", Proc. SPIE 8971, Free-Space Laser Communication and Atmospheric Propagation XXVI, 897109 (6 March 2014); https://doi.org/10.1117/12.2044491

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