Joint spectrum of photon pairs measured by coincidence Fourier spectroscopy

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 co...

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Bibliographic Details
Published in:Optics letters 2006-04, Vol.31 (8), p.1130-1132
Main Authors: WASILEWSKI, Wojciech, WASYLCZYK, Piotr, KOLENDERSKI, Piotr, BANASZEK, Konrad, RADZEWICZ, Czesław
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Optics
Photon statistics and coherence theory
Physics
Quantum optics
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Summary: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.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.31.001130