Toptica Digilock 110 User manual

TOPTICA Photonics AG
Lochhamer Schlag 19
D-82166 Graefelfing/Munich
Tel.: [phone]
Fax: [phone]
email: [e-mail]
http://www.toptica.com
(December 2017 Subject to change without notice)
Manual: M-031 Version 09
Copyright 2017 TOPTICA Photonics AG
Digilock 110
Feedback
Controlyzer
Manual

Feedback Controlyzer DigiLock 110
Status: 5.12.17
Dear Customer,
Welcome to the TOPTICA community!
We have designed this product to be easy to use and reliable so that you can focus on your work. Should
you have questions or need advice on how to integrate it into your setup, please do not hesitate to ask.
We will provide you with quick and competent help through our service staff and product managers.
You can contact us in the following ways:
- Internet: service.toptica.com. In our support section you can find a list of frequently asked ques-
tions and a service contact form
- Email: [e-mail]
- Phone: [phone].
Our customers in the USA and Canada may contact TOPTICA Photonics Inc.:
- Phone: [phone]
Our customers in Japan may contact TOPTICA Photonics K.K.:
- Phone: [phone]
Please have your product-ID/serial number ready when contacting us so we can quickly retrieve all rele-
vant information.
As we are constantly improving our products, we greatly value all customer feedback. We encourage
you to tell us what you like about our products as well as any suggestions for improvement.
Best regards,
Harald Ellmann
Director Service
TOPTICA Photonics AG

Feedback Controlyzer DigiLock 110
Status: 5.12.17
Contents
1 The Feedback Controlyzer DigiLock 110 3
1.1 Package Contents 3
1.2 Design and Operating Principle of the DigiLock 110 4
2 Safety Instructions and Warnings 6
2.1 General Safety Terms 6
2.2 Identification of Manufacturer 7
3 Operator Controls and Connections 8
3.1 Front Panel 8
3.2 Description of Front Panel Operator Controls and Connectors 9
3.3 Backplane Connections 10
4 DigiLock 110 Hardware Installation 11
5 DigiLock 110 Software Installation 12
5.1 System Requirements 12
5.2 USB-Driver Installation 12
5.3 Software Installation 12
6 DigiLock 110 Control Architecture 13
7 DigiLock Module Server (DMS) 14
8 DigiLock User Interface (DUI) 15
8.1 General 16
8.1.1 DigiLock User Interface Operation 16
8.1.2 Storage of the Profile 17
8.1.3 DigiLock 110 Software Update 17
8.2 Functions 18
8.2.1 Lock 18
8.2.2 Simulation (Controller Frequency Response) 29
8.2.3 Response (Network Analysis) 30
8.2.4 System 31
8.2.5 Settings 32
8.3 Display Area 38
8.3.1 Scope 38
8.3.2 AutoLock 39
8.3.3 Spectrum 40
8.4 Status Display 40
9 Notes on Feedback Control Loops with the DigiLock 110 41
9.1 Signal to Noise and Bandwidth Considerations 41
9.2 Frequency Modulation Techniques 41
9.3 Controller Parameter Adjustment and Optimization 42
9.4 Identification of Signal Polarity and Slope 43
9.5 Relock Feature 46
9.6 Signal Limitations in Analyzing the Locking Performance 47

Feedback Controlyzer DigiLock 110
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10 Application Examples 48
10.1 General System Setup 48
10.2 Doppler-Free Saturation Spectroscopy 53
10.2.1 Side of Fringe Locking 54
10.2.2 Top of Fringe Locking (Lock-In) 59
10.3 Pound-Drewer-Hall Stabilization to a Cavity 62
11 Appendix 66
11.1 Environmental Conditions and Weight 66
11.2 Internal Jumpers 66
11.3 DigiLock 110 PCBs 67
11.3.1 Baseboard 67
11.3.2 Plug-On Board 68
11.4 Specifications of DigiLock 110 Connections 69
11.5 Directories of the DigiLock 110 Software 70
11.6 Pin Assignment of the DigiLock 110 Backplane 71
11.7 Declaration of CE Conformity 72
11.8 EU Legislation for Electrical and Electronic Equipment (EEE) 73
12 Guarantee and Service 74

Feedback Controlyzer DigiLock 110
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1 The Feedback Controlyzer DigiLock 110
Stabilized lasers see an increasing number of applications in research and development. To meet the dif-
ferent requirements, a number of locking techniques have been developed. So far the different schemes
require a corresponding set of adapted electronics. The DigiLock 110 integrates fast analog and digital
electronics into a versatile general purpose locking module. Its up-to-date digital hardware allows to
implement the scan generator, PID controllers and optional frequency modulation techniques all into
one plug in module. Together with a graphical user interface running on a PC, the module facilitates the
procedure of laser locking enormously and provides features to analyze and optimize the control system.
DigiLock 110 features:
• Generation of scan waveforms
• Two separate PID controllers
• Lock-in error signal generator
• Pound-Drever-Hall (PDH) error signal generator
• Computer assisted hardware zoom
• Lock detection (“Click and Lock”)
• Configurable reset and relock
• Integrated multi-channel digital oscilloscope
• Network analyzer
•Spectrumanalyzer
• Controller simulation
1.1 Package Contents
1 DigiLock 110 plug in module
1 Installation USB-flash drive containing software and drivers
1 DigiLock 110 Manual (color version is provided on the installation USB-flash drive)
1 USB cable
3 BNC-SMB cables

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1.2 Design and Operating Principle of the DigiLock 110
Figure 1 Schematic block diagram of the DigiLock 110 module
For details of backplane connections see Figure 3

1. The Feedback Controlyzer DigiLock 110
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Status: 5.12.17
Figure 2 Schematic block diagram of the DigiLock 110 functional units and their Interaction
Figure 3 Schematic block diagram of the connections to the DC 110 backplane

Feedback Controlyzer DigiLock 110
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2 Safety Instructions and Warnings
2.1 General Safety Terms
The following safety terms are used in this manual:
The DANGER ! heading in this manual explains danger that could result in personal injury or death.
The CAUTION ! heading in this manual explains hazards that could damage the instrument.
In addition, a NOTE ! heading provides information to the user that may be beneficial in the use of the
instrument.
DANGER ! Before operating the DigiLock 110 plug in module please read this manual carefully to
CAUTION ! prevent from damage to the electronics, connected diode lasers and injury to persons. The
following safety instructions must be followed at all times.
DANGER ! Possibility of electrical shock ! Wherever this symbol is attached, the possibility of an
CAUTION ! electrical shock may appear. Use only equipment and accessories supplied
by TOPTICA.
Caution ! Wherever this symbol is attached read and understand the manual before
operating the device. The manual must be consulted in order to find out the nature
of the potential HAZARDS and any actions which have to be taken to avoid them.
DANGER ! Do not position the equipment so that it is difficult to operate the disconnecting device.
DANGER ! Use of controls or adjustments or performance of procedures other than those specified
herein may result in hazardous radiation exposure.
DANGER ! If the equipment is used in a manner not specified by the manufacturer, the protection pro-
vided by the equipment may be impaired.
DANGER ! The electrical units should not be operated in a hazardous environment.
DANGER ! Any plug in module should only be opened by trained personnel. Before exchanging and
opening any module, the Sys DC 110 Supply Electronics must be switched off and discon-
nected from the mains supply.
DANGER ! Do not look into the laser beam as the output can exceed the limits for class 1 specified by US
laws 21 CFR 1040.10 and 2 CFR 1040.11 and the Laser Safety Standard EN 60825-1:2014. Take
precautions to eliminate exposure to a direct or reflected beam.