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Search Publications by: Alan Migdall (Fed)

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Displaying 176 - 200 of 217

Migdall Responds II: More Correlated Photon Metrology History

November 1, 1999
Author(s)
Alan L. Migdall
I appreciate the comments of Mike Gruntman (Sept., page 80) concerning the history of using correlated pairs of particles(photons) to determine absolute detector quantum efficiencies. Unfortunately there is an overall misunderstanding of the technique

Migdall Responds

May 1, 1999
Author(s)
Alan L. Migdall
I thank Duane Jaecks for pointing out earlier origins of the first of the correlated photon metrology applications described in my article - absolute detector quantum efficiency. The work in these early references is helpful in putting the technique in a

Correlated Photon Based Metrology Without Absolute Standards

January 1, 1999
Author(s)
Alan L. Migdall
Pairs of photons produced two at a time via optical parametric down-conversion have proved to be a useful tool for metrology. The status of three such applications is presented. One common theme through each of these applications is that they offer

Spectroradiometric Detector Measurements: Part III--Infrared Detectors

December 1, 1998
Author(s)
Alan L. Migdall, George P. Eppeldauer
The National Institute of Standards and Technology (NIST) supplies calibrations of IR photodetector's spectral radiant power response from 1.8 υm to 20 υm. The spectral responsivity of a detector under test is determined by comparison to an absolute

Characterization of High-OD Ultrathin Infrared Neutral Density Filters

October 8, 1998
Author(s)
Simon G. Kaplan, Leonard M. Hanssen, Alan L. Migdall, G Lefever-Button
We have performed transmittance measurements of metal-film neutral density filters on ultrathin polymer substrates using both Fourier-transform infrared spectrometer and laser-based (3.39 mm and 10.6 mm) systems. The use of ultrathin substrates, free of

InSb Working Standard Radiometers

October 1, 1998
Author(s)
George P. Eppeldauer, Alan L. Migdall, Leonard M. Hanssen
Standard quality InSb radiometers have been developed and characterized at the national Institute of Standards and Technology (NIST). The InSb radiometers will hold the recently realized spectral response scale of the NIST and will serve as working