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6 September 2011 Generation of broadband spontaneous parametric fluorescence and its application to quantum optical coherence tomography
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Abstract
Optical coherence tomography (OCT) based on Michelson interferometer has widely been utilized in biology and medicine as a type of optical biopsy and quantum optical coherence tomography (QOCT) based on Hong-Ou-Mandel interferometer has recently been demonstrated. By use of quantum entangled photon pairs generated via spontaneous parametric down conversion (SPDC) process, axial resolution of QOCT can be better than that of OCT in principle for a source of same bandwidth and group velocity dispersion (GVD) effect for QOCT can be automatically cancelled thanks to the frequency correlation of entangled photon pairs. To realize high-resolution QOCT, we need a broadband quantum entangled photon pair source. Then we proposed a novel conventional method to generate broadband spontaneous parametric fluorescence via SPDC by using multiple nonlinear crystals pumped by a CW laser. Our method has controllability to tune the center frequency of generated photons and scalability to extend the number of crystals. This conventional method can enable us to achieve sub-micron axial resolution of QOCT.
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Masayuki Okano, Ryo Okamoto, Akira Tanaka, Shanthi Subashchandran, Shutaro Ishida, Norihiko Nishizawa, and Shigeki Takeuchi "Generation of broadband spontaneous parametric fluorescence and its application to quantum optical coherence tomography", Proc. SPIE 8163, Quantum Communications and Quantum Imaging IX, 816312 (6 September 2011); https://doi.org/10.1117/12.893213
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