qutools quED - Table of Contents

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 eciency.
www.qutools.com quCR Manual Version 3.2 Page 2