qutools quED, User And Operation Manual

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Contents
Contents
1 Introduction 2
1.1 General Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Front Panel 3
3 Back Panel 5
4 Twin APD Module 6
5 Touch Panel 8
5.1 Touch Panel Software Overview . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2 The quLD Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.3 The quCNT Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.4 The quMotor Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.5 The quInfo Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 Controlling the quCR via Ethernet 25
6.1 Open a VNC connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.2 HTTP Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
1 Introduction
This manual describes the controller of qutools' quED - entanglement demonstrator. It
features a laser diode controller, a coincidence counter and a twin APD
1
photon counting
module. The laser diode controller regulates the temperature of the laser diode and the
current owing through it. The counter module displays the single and coincidence count
rates of the signals coming from the APD module.
1
APD: Avalanche Photo Diode. When working in the so-called Geiger mode, these devices can be used
to register single photons with a rather high eciency.
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