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Proceedings Paper

InGaAs/InP SPAD photon-counting module with auto-calibrated gate-width generation and remote control
Author(s): Alberto Tosi; Alessandro Ruggeri; Andrea Bahgat Shehata; Adriano Della Frera; Carmelo Scarcella; Simone Tisa; Andrea Giudice
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Paper Abstract

We present a photon-counting module based on InGaAs/InP SPAD (Single-Photon Avalanche Diode) for detecting single photons up to 1.7 μm. The module exploits a novel architecture for generating and calibrating the gate width, along with other functions (such as module supervision, counting and processing of detected photons, etc.). The gate width, i.e. the time interval when the SPAD is ON, is user-programmable in the range from 500 ps to 1.5 μs, by means of two different delay generation methods implemented with an FPGA (Field-Programmable Gate Array). In order to compensate chip-to-chip delay variation, an auto-calibration circuit picks out a combination of delays in order to match at best the selected gate width. The InGaAs/InP module accepts asynchronous and aperiodic signals and introduces very low timing jitter. Moreover the photon counting module provides other new features like a microprocessor for system supervision, a touch-screen for local user interface, and an Ethernet link for smart remote control. Thanks to the fullyprogrammable and configurable architecture, the overall instrument provides high system flexibility and can easily match all requirements set by many different applications requiring single photon-level sensitivity in the near infrared with very low photon timing jitter.

Paper Details

Date Published: 4 February 2013
PDF: 7 pages
Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 86311G (4 February 2013); doi: 10.1117/12.2004863
Show Author Affiliations
Alberto Tosi, Politecnico di Milano (Italy)
Alessandro Ruggeri, Politecnico di Milano (Italy)
Andrea Bahgat Shehata, Politecnico di Milano (Italy)
Adriano Della Frera, Politecnico di Milano (Italy)
Carmelo Scarcella, Politecnico di Milano (Italy)
Simone Tisa, Micro Photon Devices Srl (Italy)
Andrea Giudice, Micro Photon Devices Srl (Italy)

Published in SPIE Proceedings Vol. 8631:
Quantum Sensing and Nanophotonic Devices X
Manijeh Razeghi, Editor(s)

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