LLAMAS: low-latency adaptive optics at LLNL

Ammons, S. Mark; Bauman, Brian; Burton, Greg; Gates, C.; Dawson, Jay W.; Hackel, Brian; Homoelle, D.; Kim, Michael; Larkin, G. Richard; Palmer, David; Panas, Robert M.; Pax, Paul H.; Poyneer, Lisa

doi:10.1117/12.2314281

Adaptive Optics Systems VI 2018

DOI: 10.1117/12.2314281

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LLAMAS: low-latency adaptive optics at LLNL

S. Mark Ammons

Brian Bauman

Greg Burton

et al.

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2023

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Laboratory demonstration of the prediction of wind-blown turbulence by adaptive optics at 8 kHz with use of LQG control

Poyneer¹,

Ammons²,

Kim³

et al. 2023

Appl. Opt.

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The low-latency adaptive optical mirror system (LLAMAS) is designed to push the limits on achievable latencies and frame rates. It has 21 subapertures across its pupil. A reformulated version of the linear quadratic Gaussian (LQG) method predictive Fourier control is implemented in LLAMAS; for all modes, it takes just 30 µs to compute. In the testbed, a turbulator mixes hot and ambient air to produce wind-blown turbulence. Wind prediction clearly improves correction when compared to an integral controller. Closed-loop telemetry shows that wind-predictive LQG removes the characteristic “butterfly” and reduces temporal error power by up to a factor of three for mid-spatial frequency modes. Strehl changes seen in focal plane images are consistent with telemetry and the system error budget.

show abstract

Laboratory demonstration of the prediction of wind-blown turbulence by adaptive optics at 8 kHz with use of LQG control

Poyneer¹,

Ammons²,

Kim³

et al. 2023

Appl. Opt.

View full text Add to dashboard Cite

show abstract

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LLAMAS: low-latency adaptive optics at LLNL

Cited by 1 publication

References 5 publications

Laboratory demonstration of the prediction of wind-blown turbulence by adaptive optics at 8 kHz with use of LQG control

Laboratory demonstration of the prediction of wind-blown turbulence by adaptive optics at 8 kHz with use of LQG control

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