OSA's Digital Library

Optics Letters

Optics Letters


  • 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)

View Full Text Article

Enhanced HTML    Acrobat PDF (232 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



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

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

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)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. D. V. O’Connor, D. Phillips, Time-Correlated Single Photon Counting (Academic, London, 1983).
  2. J. Hardy, Proc. IEEE 66, 651 (1978). [CrossRef]
  3. E. Gramsch, M. Szawlowski, S. Zhang, M. Madden, IEEE Trans. Nucl. Sci. 41, 762 (1994). [CrossRef]
  4. A. Lacaita, P. A. Francese, F. Zappa, S. Cova, Appl. Opt. 33, 6902 (1994). [CrossRef] [PubMed]
  5. S. Cova, M. Ghioni, A. Lacaita, S. Samori, F. Zappa, “Avalanche photodiodes and quenching circuits for single-photon detection,” Appl. Opt. (to be published).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1 Fig. 2 Fig. 3
Fig. 4

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited