Quantum Radiometric Calibration
This work introduces Quantum Radiometric Calibration (QRC) to precisely calibrate photodiodes using squeezed light. By measuring the Heisenberg uncertainty product of squeezed vacuum states, researchers determined that 1550 nm photodiodes have a system detection efficiency of (97.20 ± 0.37)% and a quantum efficiency of (96.9 ± 0.4)%. This method offers high precision for determining detector performance.