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You searched on: Author: alan migdall

Displaying records 151 to 160 of 199 records.
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151. Absolute Quantum Efficiency Measurements Using Correlated Photons: Toward a Measurement Protocol
Published: 4/1/2001
Author: Alan L Migdall
Abstract: Correlated photons can be used to measure of the quantum efficiency of photon counting photodetectors without ties to any externally calibrated standards. We present a study of the measurement systematics for the purpose of reducing the measurement ...

152. Absolute Quantum Efficiency Measurements Using Correlated Photons: Toward a Measurement Protocol
Published: 1/1/2001
Author: Alan L Migdall

153. Simultaneous Measurement of Group and Phase Delay Between Two Photons
Published: 12/1/2000
Authors: D A Branning, Alan L Migdall, A V Sergienko
Abstract: We report on an experiment to determine both the group and phase delays experienced by orthogonally polarized photon pairs travelling through a birefringent medium. Both types of delay are determined from the same set of coincidence-counting data. Th ...

154. Ultrafast Terahertz Spectroscopy: Measuring Low-Frequency Vibrational Modes of Hydrogen-Bonded Systems
Published: 7/1/2000
Authors: D A McWhorter, Alan L Migdall, Edwin J Heilweil
Abstract: An ultrafast terahertz spectrometer using ZnTe crystals for optical rectification and free-space electro-optic sampling has been developed to measure vibrational dynamics of biological molecules. Spectrometer characteristics and absorption spectra o ...

155. Infrared Spectral Responsivity Scale of NIST
Published: 5/1/2000
Authors: George P Eppeldauer, Alan L Migdall
Abstract: An ambient temperature Infrared Spectral Responsivity Comparator Facility has been developed at NIST to calibrate infrared detectorsand radiometers for spectral and spatial responsivities. Test detectors are substituted for working- or transfer-stan ...

156. Calculating Characteristics of Non-collinear Phase-Matching in Uniaxial and Biaxial Crystals
Published: 4/1/2000
Authors: N Boeuf, D A Branning, I Chaperot, E Dauler, S Guerin, G Jaeger, Andreas Muller, Alan L Migdall
Abstract: A method of calculating the characteristics of phase-matching in both uniaxial and biaxial crystals is presented. Although significant work has been done to characterize the collinear case of phase-matching and to present many of its applications, t ...

157. Observation of Photons From an Inhibited Spontaneous Emitter
Published: 2/1/2000
Authors: D A Branning, Alan L Migdall
Abstract: A fun and timely problem in cavity quantum electrodynamics is the question of whether atoms are actually radiating anything when their spontaneous emission is inhibited by a cavity. Recent theoretical papers have indicated that the answer to this que ...

158. Calculating Characteristics of Noncollinear Phase Matching in Uniaxial and Biaxial Crystals
Published: 1/1/2000
Authors: N Boeuf, D A Branning, I Chaperot, E Dauler, S Guerin, G Jaeger, Andreas Muller, Alan L Migdall

159. Using Correlated Photons to Measure Polarization Mode Dispersion with Attosecond Resolution
Published: 12/1/1999
Authors: Alan L Migdall, G Jaeger, A V Sergienko
Abstract: We describe the status of a highly stable dual scale technique for measuring polarization mode dispersion (PMD) using two-photons produced via parametric down conversion. The method uses a two-photon interference to observe relative propagation time ...

160. Differences Explained in Correlated-Photon Metrology Techniques
Published: 11/1/1999
Author: Alan L Migdall

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