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Generation and characterization of high-purity, pulsed squeezed light at telecom wavelengths from pp-KTP



Thomas Gerrits, Martin J. Stevens, Burm Baek, Brice R. Calkins, Adriana E. Lita, Scott C. Glancy, Emanuel H. Knill, Sae Woo Nam, Richard P. Mirin, Robert Hadfield, Ryan Bennink, Warren Grice, Sander N. Dorenbos, Tony Zijlstra, Teun Klapwijk, Val Zwiller


We characterize a pp-KTP crystal designed to produce pure single mode squeezed vacuum at 1570 nm. Measurements show a raw (corrected) Hong-Ou-Mandel interference with 86 % (90 %) visibility and a circular joint spectral probability distribution with a Schmidt number of 1.08 when spectral filtering with 8.6 nm bandwidth is applied. We use superconducting nanowire single photon detectors to measure the joint spectral probability distribution, and use photon-number resolving transition edge sensors to perform Hong-Ou-Mandel interference experiments. Both types of detectors are used to measure second-order correlations: the nanowire detectors with time-domain histogramming, and the transition edge sensors by measuring photon number statistics. Results from these two very different techniques are in good agreement.
Optics Express


homodyne detection, optical cat states, periodic poling, quantum information, squeezing, transition edge sensors


Gerrits, T. , Stevens, M. , Baek, B. , Calkins, B. , Lita, A. , Glancy, S. , Knill, E. , Nam, S. , Mirin, R. , Hadfield, R. , Bennink, R. , Grice, W. , Dorenbos, S. , Zijlstra, T. , Klapwijk, T. and Zwiller, V. (2011), Generation and characterization of high-purity, pulsed squeezed light at telecom wavelengths from pp-KTP, Optics Express, [online], (Accessed May 29, 2024)


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Created November 15, 2011, Updated February 19, 2017