Multiphoton discrimination at telecom wavelength with charge integration photon detector

被引：22

作者：

Fujiwara, M ^{[1
]}

Sasaki, M ^{[1
]}

机构：

[1] Natl Inst Informat & Commun Technol, Tokyo 1848795, Japan

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 11期

关键词：

D O I：

10.1063/1.1886903

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a charge integration photon detector (CIPD) that enables the efficient measurement of photon number states at the telecom-fiber wavelengths with a quantum efficiency of 80% and a resolution less than 0.5 electrons at 1 Hz sampling. The CIPD consists of an InGaAs pin photodiode and a GaAs JFET in a charge integration amplifier, which is cooled to 4.2 K to reduce thermal noise and leakage current. The charge integration amplifier exhibits a low noise level of 470 nV/Hz(1/2). The dark count is as low as 500 electrons/h. (C) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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