Measurements of Low Optical Power with Cryostat-Based Predictable Quantum Efficient Detector at Liquid Nitrogen Temperature

Research output: Contribution to conferenceAbstractScientific

Abstract

We performed a test on linearity of optical power
measurement with Predictable Quantum Efficient
Detector (PQED) at liquid nitrogen temperature
(77 K). Low optical power levels from 3.3 pW
down to 400 fW at 514 nm and 785 nm
wavelengths were used. Detector’s responsivity is
linear well within the relative measurement
uncertainties between 0.5% and 2% (k=2). The
lowest power corresponds to a photon flux of
1 000 000 photons per second, which allows
calibration of single-photon detectors directly
against a primary standard of optical power.
Original languageEnglish
Publication statusSubmitted - 15 Mar 2023
MoE publication typeNot Eligible

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