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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 34 — Dec. 1, 1997
  • pp: 9117–9118

Pyroelectric Trap Detector for Spectral Responsivity Measurements

J.H. Lehman  »View Author Affiliations


Applied Optics, Vol. 36, Issue 34, pp. 9117-9118 (1997)
http://dx.doi.org/10.1364/AO.36.009117


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Abstract

We have designed and built a pyroelectric optical detector for use as a transfer standard for the calibration of optical power meters. The pyroelectric element is made from lithium tantalate (LiTaO3). Gold black is used as the optical absorber in a multiple reflection wedge-shaped trap structure, with a 5-mm diameter input aperture and an f/4 field-of-view. The detector’s spatial responsivity varies less than 1%. The responsivity as a function of wavelength varies less than 1% over a range from 0.45–1.55 µm and less than 4% from 1.55–10.6 µm. The measured noise equivalent power (NEP) is 5 × 10−8 W/Hz1/2. For this wavelength range and detector area, the measured NEP and spatial uniformity represents a significant improvement over comparable predecessors.

© 1997 Optical Society of America

Citation
J.H. Lehman, "Pyroelectric Trap Detector for Spectral Responsivity Measurements," Appl. Opt. 36, 9117-9118 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-34-9117


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References

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  2. D.J. Advena et al., “Deposition and characterization of far-infrared absorbing gold black films,” Appl. Opt. 32, (7), (1993). [CrossRef] [PubMed]
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