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Proceedings Paper

Dual-wavelength transfer standard for laser peak-power measurement
Author(s): Rodney Leonhardt; Daniel King
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Paper Abstract

The National Institute of Standards and Technology (NIST) and the Naval Surface Warfare Center - Corona Division (NSWC) have jointly developed a dual-wavelength extended-sensitivity radiometer (D-ESR) that functions as a portable transfer standard for measuring laser pulses at wavelengths of 1.06 μm and 1.55 μm. The peak-power irradiance range is from 500 pW/cm2 to 50 μW/cm2 within the wavelength range of 1.54 μm to 1.58 μm. A similar peak-power range is covered at a wavelength of 1.06 μm. The measurement range is covered by using smaller apertures or a neutral-density filter to reach the highest peak powers. The D-ESR radiometer is based on an InGaAs avalanche photodiode (APD) detector that is integrated with a transimpedance preamplifier module. The light-collecting optical system has a maximum aperture of approximately 125 cm2. The D-ESR is able to measure Gaussian pulse duration from 4 ns to 400 ns. The output is a negative-going pulse waveform that is measured with an oscilloscope. The total expanded uncertainty of a calibrated peak-power measurement with a D-ESR radiometer is approximately 9 % (k=2).

Paper Details

Date Published: 9 May 2011
PDF: 10 pages
Proc. SPIE 8014, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXII, 80141B (9 May 2011); doi: 10.1117/12.883464
Show Author Affiliations
Rodney Leonhardt, National Institute of Standards and Technology (United States)
Daniel King, Naval Surface Warfare Ctr. Corona Div. (United States)

Published in SPIE Proceedings Vol. 8014:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXII
Gerald C. Holst; Keith A. Krapels, Editor(s)

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