@article {cohen_absolute_2018,
	title = {Absolute calibration of single-photon and multiplexed photon-number-resolving detectors},
	journal = {Phys. Rev. A},
	volume = {98},
	number = {1},
	year = {2018},
	note = {Publisher: American Physical Society},
	pages = {013811},
	abstract = {Single-photon detectors are widely used in modern quantum optics experiments and applications. Like all detectors, it is important for these devices to be accurately calibrated. A single-photon detector is calibrated by determining its detection efficiency; the common method to measure this quantity requires comparison to another detector. Here, we suggest a method to measure the detection efficiency of a single-photon detector without requiring an external reference detector. Our method is valid for individual single-photon detectors as well as multiplexed detectors, which are known to be photon number resolving. The method exploits the even-number photon-statistics of a nonlinear source, as well as the nonlinear loss of a single-photon detector that occurs when multiple photons are incident simultaneously. We have analytically modeled multiplexed detectors and used the results to experimentally demonstrate the calibration of a single-photon detector without the need for an external reference detector.},
	doi = {10.1103/PhysRevA.98.013811},
	url = {https://link.aps.org/doi/10.1103/PhysRevA.98.013811},
	author = {Cohen, Lior and Pilnyak, Yehuda and Istrati, Daniel and Studer, Nicholas M. and Dowling, Jonathan P. and Eisenberg, Hagai S.}
}
