自由空间和光纤耦合单光子探测器的校准。

Calibration of free-space and fiber-coupled single-photon detectors.

作者信息

Gerrits Thomas, Migdall Alan, Bienfang Joshua C, Lehman John, Nam Sae Woo, Splett Jolene, Vayshenker Igor, Wang Jack

机构信息

National Institute of Standards and Technology, Boulder, CO 80305, United States of America.

Joint Quantum Institute, University of Maryland and National Institute of Standards and Technology, Gaithersburg, MD 20899, United States of America.

出版信息

Metrologia. 2020;57(1). doi: 10.1088/1681-7575/ab4a9c.

DOI:10.1088/1681-7575/ab4a9c

PMID:34121773

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8194288/

Abstract

We measure the detection efficiency of single-photon detectors at wavelengths near 851 nm and 1533.6 nm. We investigate the spatial uniformity of one free-space-coupled single-photon avalanche diode and present a comparison between fusion-spliced and connectorized fiber-coupled single-photon detectors. We find that our expanded relative uncertainty for a single measurement of the detection efficiency is as low as 0.70% for fiber-coupled measurements at 1533.6 nm and as high as 1.78% for our free-space characterization at 851.7 nm. The detection-efficiency determination includes corrections for afterpulsing, dark count, and count-rate effects of the single-photon detector with the detection efficiency interpolated to operation at a specified detected count rate.

摘要

我们测量了波长接近851纳米和1533.6纳米时单光子探测器的探测效率。我们研究了一个自由空间耦合单光子雪崩二极管的空间均匀性，并对熔接和连接器化光纤耦合单光子探测器进行了比较。我们发现，对于1533.6纳米处的光纤耦合测量，单次测量探测效率的扩展相对不确定度低至0.70%；而对于851.7纳米处的自由空间特性表征，该不确定度高达1.78%。探测效率的测定包括对单光子探测器的后脉冲、暗计数和计数率效应进行校正，并将探测效率内插到以指定探测计数率运行的情况。