NKT Koheras BASIK Manuale utente

Koheras BASIK

PRODUCT GUIDE

Low Noise Single Frequency Laser Module

PRODUCT GUIDE

This guide includes the following NKT Photonics Lasers:

Koheras BASIK

Low Noise Single Frequency Laser Module

Koheras BASIK Product Description Revision 1.1 01-2020 W-10456

GUIDE OVERVIEW

This product guide is intended to provide functional, operational and installation

information for the Koheras BASIK laser modules. The guide is divided into three

sections:

• Koheras BASIK Description - introduces the laser, its functionality, interfaces

and chassis variants.

• Operating the Laser – provides information and procedures on how to

connect, configure and manage the laser.

• Installing the Laser – includes the details on how to install the laser and

connect optional interfaces.

Warning: Do not operate the laser before first reading and understanding all

warnings, cautions and handling information stated within the document:

Koheras BASIK Safety, Handling and Regulatory Information

Note: The paper copy of this document is included with your laser however it can

also be downloaded from:

https://www.nktphotonics.com/lasers-fibers/support/product-manuals/

Terminology This guide may refer to the Koheras BASIK modules as “the laser”. In specific

cases where a distinction is required, this guide will use the actual laser model

names or simply refer to the laser as the “module”.

Target audience This guide is for technical personnel involved in the selection, planning and

deployment of lasers in laboratory and industrial settings. The guide assumes a

reasonable knowledge level of lasers, photonic principles and electrical interface

connectivity.

Chapters inside This guide includes the following chapters:

• Chapter I “Laser Description” — Describes the laser including its general

operational principles, management and interfaces.

• Chapter 2 “Modulation” — Information on implementation of the laser’s

wavelength modulation feature.

• Chapter 3 “Communicating with the Laser” — Provides information and

procedures on how to setup a PC with the laser’s management software and

connect it to the laser.

• Chapter 4 “Turning ON the Laser” — Contains procedures on how to safely

turn the laser emissions on and off using the management software.

• Chapter 5 “Using CONTROL” — Includes descriptions of all NKT CONTROL

menu, settings, and panel items.

• Chapter 6 “Software Development Kit” — Includes descriptions and

procedures for some of the key settings that can be configured using the

SDK.

• Chapter 7 “Mechanical Installation” — Includes information and procedures on

how to correctly install the laser chassis. Procedures within this chapter focus

on providing adequate temperature regulation.

• Chapter 8 “Connecting the Laser” — This chapter provides the information on

how to physically connect the safety interlock, power, the optical

connections, and the BASIK interface board accessory.

• Appendices — The guide includes multiple appendices including laser

specifications, support contact details, accessory descriptions, a

configuration ID cross-reference and miscellaneous procedures and

information supporting the laser operation and installation.

Added information

and safety notices

Lasers are highly dangerous devices that can cause serious injury and property

damage. This guide use the following symbols to either highlight important safety

information or provide further information in relation to a specific topic.

Note: Highlights additional information related to the associated topic and/or

provides links or the name of the NKT guides describing the additional informa-

tion.

Caution: Alerts you to a potential hazard that could cause loss of data, or damage

the system or equipment.

Warning: The laser safety warning alerts you to potential serious injury that may

be caused when using the laser.

Revision The section records the document revision details.

Date Revision Changes

2019-10 1.0 First release - documents rewritten and overhauled from earlier releases.

2020-01 1.1 Added appendix F - Configuration IDs: configuration ID description and

cross-reference for standard configuration IDs.

CONTENTS

Guide Overview ................................................................................................................... 3

Terminology ............................................................................................................ 3

TABLES .....................................................................................................................11

FIGURES ..................................................................................................................13

PROCEDURES ........................................................................................................17

Section 1 KOHERAS BASIK DESCRIPTION 19

1 Laser Description ...............................................................................................................21

Features and Options ......................................................................................... 21

Theory of operation ........................................................................................... 22

Module variants ........................................................................................................ 22

Configuration ID .................................................................................................. 22

Center wavelength ............................................................................................. 22

Output power ........................................................................................................23

Tuning types .........................................................................................................23

Front and rear panels .............................................................................................. 23

Front panel ............................................................................................................23

Rear panel ............................................................................................................ 24

Optical specifications .............................................................................................. 25

Laser features ........................................................................................................... 25

Thermal tuning .................................................................................................... 25

Fast wavelength modulation ........................................................................... 26

External cavity stabilization ...............................................................................27

Operating mode ...................................................................................................27

Trigger ....................................................................................................................27

Auto-start ...............................................................................................................27

Emission delay ..................................................................................................... 28

Shutdown delay .................................................................................................. 28

High temperature shutdown ............................................................................ 28

Power verification ............................................................................................... 28

Miscellaneous ............................................................................................................ 29

Power supply ....................................................................................................... 29

Safety ..................................................................................................................... 29

Accessories .......................................................................................................... 29

Optical interface ........................................................................................................ 30

Optical fibers, connectors and adapters ...................................................... 30

Laser Control .............................................................................................................. 31

User interface ....................................................................................................... 31

Status LEDs ................................................................................................................. 31

Module labels ............................................................................................................ 32

2 Modulation ......................................................................................................................... 35

Fast wavelength modulation ................................................................................. 35

Configuring external and internal wavelength modulation ..................... 35

Wavelength+/- signal ......................................................................................... 36

Differential input ...................................................................................................37

Single-ended to differential ..............................................................................37

Singled-ended input ...........................................................................................37

Wavelength- to GND .......................................................................................... 39

Differential output ............................................................................................... 40

Wavelength modulation coupling .................................................................. 40

Narrow vs. Wide modulation range ............................................................... 40

Frequency response .......................................................................................... 40

External cavity stabilization (BASIK X15) ............................................................. 42

Setting up external cavity stabilization ......................................................... 43

Section 2 OPERATING THE LASER 45

3 Communicating with the Laser ......................................................................................47

Connection Kit ........................................................................................................... 47

CONTROL software ................................................................................................. 47

Installing the software ........................................................................................47

Software Development Kit ..................................................................................... 48

Generic User Interface .......................................................................................48

Connecting the laser to a PC with CONTROL .................................................. 48

Connecting the laser to a PC using the Generic User Interface ................... 51

4 Turning ON the Laser .......................................................................................................53

Safety ........................................................................................................................... 53

Preparation ................................................................................................................ 53

Controlling the laser emissions ............................................................................ 54

Turning On the laser .......................................................................................... 54

5 Using CONTROL ...............................................................................................................57

CONTROL overview .................................................................................................57

Relocating panels ............................................................................................... 58

Toggling panels .................................................................................................. 59

Connecting to the laser .................................................................................... 59

Status panel ............................................................................................................... 59

Status indicators ................................................................................................. 60

Module info ........................................................................................................... 61

Measurements ...................................................................................................... 61

WL mod button and indicator ........................................................................... 61

Emission button .................................................................................................... 61

CONTROL settings .................................................................................................... 61

Wavelength modulation .................................................................................... 62

Trigger ................................................................................................................... 66

Power/Current mode ..........................................................................................67

Auto-start .............................................................................................................. 68

View ....................................................................................................................... 68

CONTROL menu items ........................................................................................... 69

Serial monitor ....................................................................................................... 69

Application log .................................................................................................... 69

CONTROL – Control panel ..................................................................................... 71

Wavelength ............................................................................................................71

Power mode ...........................................................................................................71

Current mode ....................................................................................................... 72

6 Software Development Kit ..............................................................................................73

Read/write registers ................................................................................................. 74

Tuning the wavelength .......................................................................................74

Setting the operating mode ..............................................................................74

Auto start ................................................................................................................74

Setting the emission delay ............................................................................... 75

Narrow and wide range setting ...................................................................... 75

Setting the wavelength modulation source ................................................. 76

Setting the wavelength modulation signal coupling ..................................77

Internal generator frequency ............................................................................78

Internal generator amplitude ............................................................................78

Internal generator signal waveform ................................................................78

Internal generator -signal output .................................................................... 79

Wavelength modulation on/off ........................................................................ 80

Trigger setting input/output ............................................................................. 80

Trigger indicates emission ................................................................................ 81

Trigger sawtooth wavelength modulation .................................................... 81

Readings ..................................................................................................................... 82

Errors and status indicators ................................................................................... 83

Status indicators .................................................................................................. 83

Error codes ........................................................................................................... 83

Graphing ..................................................................................................................... 83

Section 3 INSTALLING THE LASER 85

7 Mechanical Installation ....................................................................................................87

General ........................................................................................................................ 87

Standalone mounting .............................................................................................. 87

Heat dissipation ...................................................................................................87

Slide-in mounting ..................................................................................................... 88

Operating and storage environment ............................................................. 90

8 Connecting the Laser ........................................................................................................91

Connecting the safety interlock ............................................................................ 91

Interlock operation .............................................................................................. 91

Lemo connector ................................................................................................... 91

Connecting an interlock switch ...................................................................... 92

Connecting power ................................................................................................... 93

Connecting modulation signals ............................................................................ 93

BASIK interface board ....................................................................................... 93

Connecting the trigger input or output ............................................................... 96

Input trigger .......................................................................................................... 96

Output trigger ...................................................................................................... 96

Connecting the optical output ...............................................................................97

Appendices

A Specifications ....................................................................................................................101

B Service and support Information .................................................................................105

Servicing the laser ..................................................................................................105

Opening the laser chassis ...............................................................................105

WARRANTY VOID IF REMOVED Label ........................................................105

Support contact details ..........................................................................................106

Support Email .....................................................................................................106

Online support web-page ...............................................................................106

Shipping address ...............................................................................................106

C Interface Pin Assignments ............................................................................................ 107

Main electrical interface ........................................................................................107

D CONTROL Software .......................................................................................................109

Installing CONTROL ................................................................................................109

E RS-485 adapter .................................................................................................................115

Main adapter ........................................................................................................115

F Configuration ID ............................................................................................................... 117

Module Configuration ID ................................................................................... 117

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