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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 21, Iss. 1 — Jan. 1, 1996
  • pp: 59–61

Counting, timing, and tracking with a single-photon germanium detector

F. Zappa, A. Lacaita, S. Cova, and P. Lovati  »View Author Affiliations


Optics Letters, Vol. 21, Issue 1, pp. 59-61 (1996)
http://dx.doi.org/10.1364/OL.21.000059


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Abstract

We report the performance of a germanium quad-cell, composed of four avalanche photodiodes operated in the photon-counting regime, biased above the breakdown voltage. Each pixel detects a single photon in the wavelength range 1–1.5 μm with ~10% quantum efficiency and measures the photon arrival time with a time resolution of 100 ps. By adopting a multiplexed gating of the avalanche photodiodes we avoided the optical cross talk among pixels, thus achieving a noise-equivalent power of 3 × 10−15 W/Hz1/2 for each pixel and demonstrating the tracking capabilities of such a detector.

© 1996 Optical Society of America

History
Original Manuscript: July 26, 1995
Published: January 1, 1996

Citation
F. Zappa, A. Lacaita, S. Cova, and P. Lovati, "Counting, timing, and tracking with a single-photon germanium detector," Opt. Lett. 21, 59-61 (1996)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-21-1-59

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