2005/12/05 by Wojciech Wasilewski, Piotr Wasylczyk, Piotr Kolenderski +2 · 2 citations
Computer Science · Engineering · Physics and Astronomy · #Advanced Fiber Optic Sensors #Advanced Optical Sensing Technologies #Quantum Information and Cryptography #quant-ph
paper · pdf · doi:10.1364/ol.31.001130
published as Optics Letters, Vol. 31, Issue 8, pp. 1130-1132 (2006)
arxiv created 2005/12/05 · openalex publication_date 2006/03/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We propose and demonstrate a method for measuring the joint spectrum of photon pairs via Fourier spectroscopy. The biphoton spectral intensity is computed from a two-dimensional interferogram of coincidence counts. The method has been implemented for a type-I downconversion source using a pair of common-path Mach-Zehnder interferometers based on Soleil compensators. The experimental results agree well with calculated frequency correlations that take into account the effects of coupling into single-mode fibers. The Fourier method is advantageous over scanning spectrometry when detectors exhibit high dark count rates leading to dominant additive noise.