title: Single-photon detection beyond 1 µm: performance of commercially available InGaAs/lnP detectors.
abstract: Commercially available InGaAs/lnP avalanche photodiodes, designed for optical receivers and range finders, can be operated biased above the breakdown voltage, achieving single-photon sensitivity. We describe in detail how to select the device for photon-counting applications among commercial samples. Because of the high dark-counting rate the detector must be cooled to below 100 K and operated in a gated mode. We achieved a noise equivalent power of 3 × 10(-16) W/Hz(1/2) to a 1.55-µm wavelength and a time resolution well below 1 ns with a best value of 200-ps FWHM. Finally we compare these figures with the performance of state-of-the-art detectors in the near IR, and we highlight the potentials of properly designed InGaAs/lnP avalanche photodiodes in single-photon detection.
authors.forename: A
authors.initials: A
authors.lastname: Lacaita
authors.forename: F
authors.initials: F
authors.lastname: Zappa
authors.forename: S
authors.initials: S
authors.lastname: Cova
authors.forename: P
authors.initials: P
authors.lastname: Lovati