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Integrated multi-dithering controller for adaptive optics
Atmospheric Optics: Models, Measurements, and Target-in-the-Loop Propagation
Effective compensation of phase noise in laser communication calls for fast, real-time, adaptive wavefront control. We present an analog, continuous-time, high-speed VLSI (Very Large Scale Integration) controller implementing multi-dithering perturbative gradient descent optimization of a direct measure of optical performance. The system applies parallel sinusoidal perturbations to the wavefront over a range of frequencies, and performs parallel synchronous detection of the metric signal todoi:10.1117/12.736263 fatcat:oxu6l6bsjnddbfj2ytvqczeeli