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You searched on: Author: Alessandro Restelli

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1. Ultra-short gates improve the performance of high-speed gated single photon avalanche diodes
Published: 5/28/2014
Authors: Alessandro Restelli, Joshua C Bienfang, Alan L Migdall
Abstract: We gate a InGaAs/InP single-photon avalanche diode with a narrow periodic gate obtained by summing a 1.25 GHz sinusoid with its second and third harmonic. The temporal width (FWHM) of the gate is kept below 200 ps by adjusting relative weight of the ...

2. Gigahertz-gated InGaAs SPAD system with avalanche charge sensitivity approaching the fundamental limit
Published: 5/29/2013
Authors: Alessandro Restelli, Joshua C Bienfang, Alan L Migdall
Abstract: We present an InGaAs/InP single-photon detection system operating at 1.25 GHz with detection efficiency above 50 % and per-gate afterpulse probability, measured 24.8 ns after an avalanche, below 0.2 %. The high efficiency and low afterpulse probabili ...

3. Single-photon detection efficiency up to 50% at 1310 nm with an InGaAs/InP avalanche diode gated at 1.25 GHz
Published: 4/10/2013
Authors: Alessandro Restelli, Joshua C Bienfang, Alan L Migdall
Abstract: We describe a gated Geiger-mode single-photon avalanche diode (SPAD) detection system in which both gating and avalanche discrimination are implemented by coherent addition of discrete harmonics of the fundamental gate frequency. With amplitude a ...

4. Time-domain measurements of afterpulsing in InGaAs/InP SPAD gated with sub-nanosecond pulses
Published: 5/28/2012
Authors: Alessandro Restelli, Joshua C Bienfang, Alan L Migdall
Abstract: We experimentally investigate afterpulsing in an InGaAs single-photon avalanche diode (SPAD) operating in the biasing and sensing regime of periodic-gating techniques. These techniques support single-photon counting at rates in the 100 MHz range ...

5. A Green Laser Pointer Hazard
Series: Technical Note (NIST TN)
Report Number: 1668
Published: 8/2/2010
Authors: Jemellie Galang, Alessandro Restelli, Edward W Hagley, Charles W Clark
Abstract: An inexpensive green laser pointer was found to emit 20 mW of infrared radiation during normal use. This is potentially a serious hazard that would not be noticed by most users of such pointers. We find that the problem derives from an unsafe desig ...

6. Programmable Instrumentation & GHz Signaling for Quantum Communication Systems
Published: 4/30/2009
Authors: Alan Mink, Joshua C Bienfang, Robert J. Carpenter, Lijun Ma, Barry J. Hershman, Alessandro Restelli, Xiao Tang
Abstract: We discussed custom instrumentation for high-speed single photon metrology. We focus on the difficulty of GHz data sampling and provide some techniques on how to accomplish it. We also discuss the benefits of field programmable gate arrays as the bas ...

7. Quantum key distribution at GHz transmission rates
Published: 2/11/2008
Authors: Alessandro Restelli, Joshua C Bienfang, Alan Mink, Charles W Clark
Abstract: Quantum key distribution (QKD) channels are typically realized by transmitting and detecting single photons, and therefore suffer from dramatic reductions in throughput due to both channel loss and noise. These shortcomings can be mitigated by applyi ...

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