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Publication Citation: Measuring high-order coherences of chaotic and coherent optical states

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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: Measuring high-order coherences of chaotic and coherent optical states
Published: August 24, 2009
Abstract: We demonstrate a new approach to measuring high-order temporal coherences that uses a four-element superconducting nanowire single-photon detector (SNSPD) in which four independent, single-photon-sensitive elements are interleaved over a single spatial mode of the optical beam. We show the power of this technique by measuring nth-order coherences (n = 2,3,4) both of a chaotic, pseudo-thermal source that exhibits high-order photon bunching (up to n!), and of a coherent state source for which all coherences are ~1. Our results demonstrate that using multiple detector elements to parse an optical beam over dimensions smaller than the minimum diffraction-limited spot size can be equivalent--and in some cases superior--to using multiple beamsplitters and discrete detectors that each sample a replica of the entire mode.
Proceedings: CQIQC III: Conference on Quantum Information and Quantum Control
Pages: 1 pp.
Location: Toronto, -1
Dates: August 24-27, 2009
Research Areas: Single Photon Detectors, Quantum Optics
PDF version: PDF Document Click here to retrieve PDF version of paper (87KB)