High-speed digital phase conjugator pointer-tracker for long path beam control

Paul S. Lebow; Robert Sagusti; James R. Lindle; Jason Edelberg; Abbie T. Watnik

doi:10.1117/1.OE.57.12.126107

21 December 2018 High-speed digital phase conjugator pointer-tracker for long path beam control

Paul S. Lebow, Robert Sagusti, James R. Lindle, Jason Edelberg, Abbie T. Watnik

Author Affiliations +

Optical Engineering, Vol. 57, Issue 12, 126107 (December 2018). https://doi.org/10.1117/1.OE.57.12.126107

Abstract

A real-time holographic system is demonstrated for directing energy at a retroreflective target in the presence of atmospheric beam distortions and target motion. The system searches and tracks over a five-degree field of regard. The method relies upon optical phase conjugation using an off-axis holographic configuration to generate a precompensated beam using a reflective phase-only spatial light modulator. The system operates at a 147-Hz update rate and compensates for time-dependent effects in the beam path. The performance was demonstrated over a 22-m indoor range using a rotating glass wedge to simulate beam wander.

Citation Download Citation

Paul S. Lebow, Robert Sagusti, James R. Lindle, Jason Edelberg, and Abbie T. Watnik "High-speed digital phase conjugator pointer-tracker for long path beam control," Optical Engineering 57(12), 126107 (21 December 2018). https://doi.org/10.1117/1.OE.57.12.126107

Received: 18 July 2018; Accepted: 15 November 2018; Published: 21 December 2018

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