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  • Title: Compactly packaged superconducting nanowire single-photon detector with an optical cavity for multichannel system.
    Author: Miki S, Takeda M, Fujiwara M, Sasaki M, Wang Z.
    Journal: Opt Express; 2009 Dec 21; 17(26):23557-64. PubMed ID: 20052064.
    Abstract:
    We developed superconducting nanowire single-photon detectors with an optical cavity (OC-SNSPDs) for multichannel systems. For efficient coupling, the devices were installed in compact fiber-coupled packages after their substrate thickness was reduced from 400 to 45 microm. The measured detection efficiency (DE) measurement at different substrate thicknesses and the estimation of optical coupling efficiency indicated that approximately 98% of the input light beam could be radiated on a 15 x 15 microm2 nanowire area from behind the substrate. The DEs of a NbN OC-SNSPD system were observed to be 9.5% and 25% at 1550 nm and 1310 nm, respectively (dark-count rate: 100 c/s).
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