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|Author(s):||Martin J. Stevens; Burm Baek; Eric Dauler; Andrew J. Kerman; Richard J. Molnar; Scott A. Hamilton; Karl Berggren; Richard P. Mirin; Sae Woo Nam;|
|Title:||High-Order Coherences of Chaotic and Coherent Optical States|
|Published:||January 12, 2010|
|Abstract:||We demonstrate a new approach to measuring high-order temporal coherences that uses a four-element superconducting nanowire single-photon detector. The four independent, interleaved single-photonsensitive elements parse a single spatial mode of an optical beam over dimensions smaller than the minimum diffraction-limited spot size. Integrating this device with four-channel time-tagging electronics to generate multi-start, multi-stop histograms enables measurement of temporal coherences up to fourth order for a continuous range of all associated time delays. We observe high-order photon bunching from a chaotic, pseudo-thermal light source, measuring maximum third- and fourth-order coherence values of 5.87 ± 0.17 and 23.1 ± 1.8, respectively, in agreement with the theoretically predicted values of 3! = 6 and 4! = 24. Laser light, by contrast, is confirmed to have coherence values of approximately 1 for second, third and fourth orders at all time delays.|
|Pages:||pp. 1430 - 1437|
|Keywords:||coherence, photon Correlations, single-photon detectors|
|Research Areas:||Quantum Optics|
|PDF version:||Click here to retrieve PDF version of paper (586KB)|