Adaptive optics wavefront sensors based on photon-counting detector arrays
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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For adaptive optics systems, there is a growing demand for wavefront sensors that operate at higher frame rates and with more pixels while maintaining low readout noise. Lincoln Laboratory has been investigating Geiger-mode avalanche photodiode arrays integrated with CMOS readout circuits as a potential solution. This type of sensor counts photons digitally within the pixel, enabling data to be read out at high rates without the penalty of readout noise. After a brief overview of adaptive optics sensor development at Lincoln Laboratory, we will present the status of silicon Geiger-Mode-APD technology along with future plans to improve performance.