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Publication Citation: Tunable up-conversion detector for single photon and bi-photon near-infrared spectroscopic applications

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Author(s): Oliver T. Slattery; Lijun Ma; Paulina S. Kuo; Yong-Su Kim; Xiao Tang;
Title: Tunable up-conversion detector for single photon and bi-photon near-infrared spectroscopic applications
Published: April 29, 2013
Abstract: A tunable waveguide-based frequency up-conversion detector is used for single photon level near infrared (IR) spectroscopic measurements. Applications include direct spectroscopic measurement of week near IR signals and remote bi-photon spectroscopy. We have demonstrated direct spectroscopy of single photon near IR signals from a greatly attenuated laser and a single photon source. We further applied the up-conversion spectrometer for frequency correlated bi-photon spectroscopy using a single photon source of non-degenerate photon pairs at 1310 nm (near IR) and 895 nm. In correlated bi-photon spectroscopy, the spectral function at one wavelength range of a remote object can be reproduced by locally measuring another (near IR) wavelength range using the up-conversion spectrometer and monitoring the coincidence counts. A near IR single photon detection efficiency of 32 % has been achieved with the up-conversion spectrometer. The spectral resolution of the system is approximately 0.2 nm at 1310 nm based on the acceptance width of the up-conversion chip used. In bi-photon spectroscopy, the spectral resolution for the correlated photons at 895 nm is approximately 0.1 nm. The sensitivity achieved using the up-conversion detector is -126 dBm at 1310 nm.
Conference: SPIE Defense, Security + Sensing 2013
Proceedings: Proceedings of SPIE
Location: Baltimore, MD
Dates: April 29-May 3, 2013
Keywords: Correlated bi-photon spectroscopy; up-conversion detector; up-conversion spectrometer
Research Areas: Quantum Information and Measurements
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