16 September 2015 Ultrafast superconducting single-photon detector with a reduced active area coupled to a tapered lensed single-mode fiber
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Abstract
This paper presents an ultrafast niobium nitride (NbN) superconducting single-photon detector (SSPD) with an active area of 3×3  μm2 that offers better timing performance metrics than the previous SSPD with an active area of 7×7  μm2. The improved SSPD demonstrates a record timing jitter (<25  ps), an ultrashort recovery time (<2  ns), an extremely low dark count rate, and a high detection efficiency in a wide spectral range from visible part to near infrared. The record parameters were obtained due to the development of a new technique providing effective optical coupling between a detector with a reduced active area and a standard single-mode telecommunication fiber. The advantages of the new approach are experimentally confirmed by taking electro-optical measurements.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Maria V. Sidorova, Maria V. Sidorova, Alexander V. Divochiy, Alexander V. Divochiy, Yury B. Vakhtomin, Yury B. Vakhtomin, Konstantin V. Smirnov, Konstantin V. Smirnov, "Ultrafast superconducting single-photon detector with a reduced active area coupled to a tapered lensed single-mode fiber," Journal of Nanophotonics 9(1), 093051 (16 September 2015). https://doi.org/10.1117/1.JNP.9.093051 . Submission:
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