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We demonstrate detection of infrared and visible wavelength photons in on-chip waveguides with high efficiency, low noise and high timing accuracy. We achieve photon-counting optical time domain reflectometry over 200 km of optical fiber.
We demonstrate a large grid of individually addressable superconducting single photon detectors on a single chip. Each detector element is fully integrated into an independent waveguide circuit with custom functionality at telecom wavelengths. High device density is achieved by fabricating the nanowire detectors in traveling wave geometry directly on top of silicon-on-insulator waveguides. Our superconducting...
We demonstrate 37% single-photon detection efficiency at 1550 nm via sum-frequency generation in a periodically poled lithium niobate waveguide, by pumping with a monolithic optical parametric oscillator tunable near 1800 nm.
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