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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 21 — Oct. 10, 2011
  • pp: 20347–20363

Low optical power reference detector implemented in the validation of two independent techniques for calibrating photon-counting detectors.

Jessica Y. Cheung, Christopher J. Chunnilall, Geiland Porrovecchio, Marek Smid, and Evangelos Theocharous  »View Author Affiliations

Optics Express, Vol. 19, Issue 21, pp. 20347-20363 (2011)

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We introduce a technique for measuring detection efficiency that is traceable to the primary standard, the cryogenic radiometer, through a reference silicon photodiode trap detector. The trap detector, used in conjunction with a switched integrator amplifier, can measure signals down to the 0.1 pW (3 x 105 photons second−1) level with 0.1% uncertainty in a total integration time of 300 seconds. This provides a convenient calibration standard for measurements at these levels across the optical spectrum (UV – near IR). A second technique is also described, based on correlated photons produced via parametric down-conversion. This can be used to directly measure detection efficiency in the photon counting regime, and provides a route for expanding the formulation of the candela in terms of photon flux to enable it to address the needs of emerging quantum optical technologies and applications. The two independent techniques were cross-validated by a comparison carried out at 702.2 nm, which showed agreement to within 0.2%.

© 2011 OSA

OCIS Codes
(040.5570) Detectors : Quantum detectors
(120.1880) Instrumentation, measurement, and metrology : Detection
(120.5630) Instrumentation, measurement, and metrology : Radiometry

ToC Category:

Original Manuscript: June 27, 2011
Revised Manuscript: September 6, 2011
Manuscript Accepted: September 15, 2011
Published: October 3, 2011

Jessica Y. Cheung, Christopher J. Chunnilall, Geiland Porrovecchio, Marek Smid, and Evangelos Theocharous, "Low optical power reference detector implemented in the validation of two independent techniques for calibrating photon-counting detectors.," Opt. Express 19, 20347-20363 (2011)

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