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G E T T I N G
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Chapter
S T A R T E D
1 Getting Started
This chapter provides the introduction on the MPD InGaAs Single-­‐‑
Photon Detection Module that will help you get acquainted with the product. It also includes the installation and configuration procedures that will support you in getting started with the system. 1.1 Introduction
The InGaAs single-­‐‑photon detection module is built around a Peltier cooled InGaAs/InP Single-­‐‑Photon Avalanche Diode (SPAD) for the detection of near-­‐‑infrared single photons from 900 nm up to 1700 nm. The module includes a programmable frequency and pulse generator for gating the detector, a front-­‐‑end circuit for photodetector’s avalanche sensing, a fast circuit for detector’s avalanche current quenching and operative bias voltage resetting and some sub-­‐‑circuits for signal conditioning. All the main parameters are adjustable by the user through the software interface, in order to match the requirements of the different applications. The system is composed by two parts: •
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A Detection Head which comprises of a InGaAs/InP SPAD detector and the related fast electronics. Its small dimension allows its easy integration in all experimental setups. The detection head can be of two types: Gated-­‐‑mode or Free-­‐‑
running. A Control Unit which contains the pulse generator, the Peltier controller, the communication system and the power supplies of the entire module. The control unit is the same for both types of detection heads. They are connected together through a 2 m long wide-­‐‑bandwidth cable. The system can be conveniently used both for counting and timing measurements, since the high performance electronics guarantees a clean temporal response even with fast gate transitions. Micro Photon Devices S.r.l. – Italy
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