Real-time shot-noise-limited differential photodetection for atomic quantum control
Ferran Martin Ciurana, Giorgio Colangelo, R. J. Sewell, Morgan W. Mitchell · Optics Letters · 2016
We demonstrate high-efficiency, shot-noise-limited differential photodetection with real-time signal conditioning, suitable for feedback-based quantum control of atomic systems. The detector system has quantum efficiency of 0.92, is shot-noise-limited from 7.4×105 to 3.7×108 photons per pulse, and provides real-time voltage-encoded output at up to 2.3 M pulses per second.