MOGlabs FZW600 Manual de usuario

Fizeau Wavemeter

FZW600

Version0.1.2,Rev2hardware

Limitation of Liability

MOGLaboratoriesPtyLtd(MOGLabs)doesnotassumeanyliabi-

lity arising out of the use of the information contained within this

manual. This document may contain or reference information and

products protected by copyrights or patents and does not convey

any license under the patent rights of MOGLabs, nor the rights of

others. MOGLabs will not be liable for any defect in hardware or

softwareorlossorinadequacyofdataofanykind,orforanydirect,

indirect, incidental, or consequential damages in connections with

orarisingoutoftheperformanceoruseofanyofitsproducts. The

foregoing limitation of liability shall be equally applicable to any

serviceprovidedbyMOGLabs.

MOGLaboratoriesPtyLtd(MOGLabs)2017–2020.

Nopartofthispublicationmaybereproduced,storedinaretrieval

system, or transmitted, in any form or by any means, electronic,

mechanical, photocopying or otherwise, without the prior written

permissionofMOGLabs.

Contact

Forfurtherinformation,pleasecontact:

MOGLaboratoriesP/L

49UniversitySt

CarltonVIC3053

AUSTRALIA

+61399390677

[email protected]

MOGLabsUSALLC

41914thSt

HuntingdonPA16652

USA

+18142514363

www.moglabs.com

Contents

Getting started iii

1 Introduction 1

1.1 Howitworks....................... 1

1.2 Features.......................... 2

2 Connections and controls 3

2.1 Frontpanelinterface . . . . . . . . . . . . . . . . . . . 3

2.2 Rearpanelcontrolsandconnections. . . . . . . . . . 6

3 User interface 7

3.1 On-boardUI........................ 7

3.2 WebUI........................... 8

3.3 SoftwareUI........................ 9

4 Operation 15

4.1 Fringeidentiﬁcationandoptimisation . . . . . . . . . 15

4.2 Auto-exposurealgorithm. . . . . . . . . . . . . . . . . 18

4.3 Wideandfastmodes . . . . . . . . . . . . . . . . . . . 18

4.4 Pulsedlasermeasurement. . . . . . . . . . . . . . . . 19

4.5 Externallytriggeredmode. . . . . . . . . . . . . . . . 19

4.6 Measurementaveraging . . . . . . . . . . . . . . . . . 20

4.7 PIDcontrol........................ 21

4.8 Calibrationadjustment . . . . . . . . . . . . . . . . . . 22

5 Optical switcher 25

5.1 Overview.......................... 25

5.2 Operation......................... 26

5.3 SoftwareUI........................ 26

ii Contents

5.4 SimultaneousPID . . . . . . . . . . . . . . . . . . . . 26

A Speciﬁcations 27

B Firmware updates 31

C Command language 33

C.1 Generalfunctions . . . . . . . . . . . . . . . . . . . . . 33

C.2 Displaysettings . . . . . . . . . . . . . . . . . . . . . 34

C.3 Measurementsettings . . . . . . . . . . . . . . . . . . 34

C.4 Camerasettings...................... 35

C.5 Opticalswitch....................... 36

C.6 PIDcontrol........................ 37

D Communications 39

D.1Protocol.......................... 39

D.2TCP/IP........................... 39

D.3USB............................ 41

E Dimensions 43

Getting started

1. Connect to +5 V power viatheUSBportortheDCbarreljack.

When powering with USB, it is important that the host can

supplyupto600mA.Someoldercomputersmaydetectthisas

ashort-circuitandpowerdownthedevice;USB-3.0compliant

hubsarerecommended.

2. Power on usingtherockerswitchontherear.

3. Connect ﬁbre using the supplied ﬁbre patchcord. Typically

this is FC/PC (black) on one end and FC/APC (green) on the

other. TheFC/PC sidemustbeconnectedtotheFZW.

IfthedevicewasorderedwiththeFC/APCoption(asindicated

onthechassis),thesuppliedﬁberisFC/APC onbothendsand

eitherendcanbeconnectedtotheFZW input.

Single-modeﬁbresarestronglypreferred,althoughsmall-core

multi-modeﬁbres(upto62.5µm)canbeusedattheexpense

ofreducedaccuracy.1

4. Input light withthesuppliedfree-spacetoﬁbreadapter. Typi-

callytheFZWonlyneedsafewmicrowattstooperate,sohigh

couplingeﬃciencyisnotrequired. Thesaturation (Figure1)

isameasureofthepowerreachingthedetector

Theauto-exposurealgorithmtunestheexposuretimetomatch

theinputpowerandoptimisethemeasurementrate. Insome

casesitmaybepreferabletosettheexposuretimemanually,

suchaswhenperformingmaintenanceonthesourcelaserand

thelaseroutputpowertendstoﬂuctuaterapidly.

That’sit: withacoupledﬁberyoushouldbeabletoreadthewa-

velength within two seconds of power-on. It is recommended to

1Absoluteaccuracyspeciﬁcationsareonlyvalidwhenusingsingle-modeﬁbres.

iii

iv Getting started

Figure 1: Both the built-in wavemeter display (left) and host software

(right) provide saturation indicators that measure the optical power rea-

chingthedetector.

periodically inspect the measured interference fringes for correct

structure(§4.1)toensurereliablemeasurement.

TypicallytheFZW willreachthermalequilibriumandfullaccuracy

within15minutesofbeingturnedon. Themostaccurateresultswill

beobtainedinawell-stabilisedlabenvironment. Itisrecommended

thattheFZWnotbeinthermalcontactwithanyotherequipmentto

preventformationofthermalgradients.

Host connection

TherecommendedmodeofoperationisusingtheWindowsTM host

application (chapter 3) which provides a simple interface for con-

trollingdevicefunctionality. Instructionsforconnectingviaethernet

andUSB areprovidedinAppendixD.

1. Introduction

1.1 How it works

TheFZWisahigh-precisiondevicethatmeasureslaserwavelengths

using a set of Fizeau interferometers. A Fizeau interferometer is

formed by two planar surfaces with a small wedge angle between

them,whichgeneratesspatially-varyinginterferencefringesasthe

opticalpathlengthchanges(Fig.1.1). Boththefringespacingand

phase of the resulting interference pattern are related to the wa-

velength of the incident light, so analysing their structure allows

precisedeterminationofthelaserwavelength.

Figure 1.1: CollimatedmonochromaticlaserlightandFizeauetalonscre-

ateinterferencepatternsonanimagingdetector. Thewavelengthiscalcu-

latedbycombiningmeasurementsofthefringesfromfourdiﬀerentetalons.

A rough estimate of the wavelength is obtained directly from the

fringe spacing, to an absolute accuracy of one part in 100. This

initialestimateisthenimprovedbythephaseofthefringepattern.

Multipleetalonswithdiﬀerentfree-spectralranges(FSRs)areused

to reﬁne the wavelength measurement without sacriﬁcing absolute

accuracy. TheMOGLabsFZWusesfoursuchstages,withtheFSRof

theﬁnaletalon being7.5GHz. Thisenablesthe wavelengthtobe

determinedtoanabsoluteaccuracyofonepartin107.

2Chapter 1. Introduction

1.2 Features

The MOGLabs FZW has no moving parts, and very high sensitivity

semiconductor imaging, enabling high measurement speed (up to

350persecond)andmeasurementofpulsedsourceswithonlyafew

microwattsoflight.

Longlifetimeisassuredastherearenomechanicalpartstowearout.

Theetalonsareoptically-contactedfusedsilica,withalowthermal

expansioncoeﬃcient,makingtheinstrumentincrediblyrobust,reli-

able, and stable. High precisionMEMS-based sensors areusedto

make small corrections for environmental variations. Recalibration

isnotrequiredtomaintainthestatedaccuracy;infact,theFZW is

morestablethantheneonlampusedinsomeotherwavemetersas

acalibrationsource.

TheFZW alsointegratesamodern32-bitmicroprocessorandhigh-

resolutioncompactcolourdisplay. Wavelengthcalculationisperfor-

medautomaticallyonthedevicesothatnohostcomputerisrequired.

ItiscompactandcanbepoweredfromUSB orevenarechargeable

battery,soyoucanmoveitaroundyourlabandmeasurewavelength

rightwhereyouareadjustingyourlaser.

Fast ethernet and USB communications combined with a sophisti-

cated software suite enable display on your lab computer or your

smartphone. MultipleFZW devicescanbeeasilyrun fromasingle

computer, and integration with common data acquisition systems

issimpleusingtext-basedcommandsoverstandardprotocols,with

simplebindingstoLabVIEW,MATLAB,andpython provided. PIDfre-

quency feedback locking is also included with every device, also

withoutrequiringahostcomputer.

2. Connections and controls

2.1 Front panel interface

The FZW front panel (Figure 2.1) includes an interactive colour

screenwithpush-buttoninterface,andanumberofstatusindicator

lights. This allows autonomous usage of the wavemeter indepen-

dentlyofacomputer.

Figure 2.1: MOGLabsFZW frontpanellayout.

Thebuttonsarearrangedasa“directionalpad”withup,down,left

and right buttons, and an additional OK button in the centre. In

wavelengthdisplaymode,theup/downbuttonschangethedisplay

units, and the left/right buttons swap between diﬀerent diagnostic

modes(see§3.1). PressingOK opensthemenusystem.

The display includes a sleep mode which reduces the brightness

whennotinuse. Wherethisfeatureisundesirableitcanbedisabled

bysettingthesleeptimetozerointhemenusystem.

4Chapter 2. Connections and controls

TheLED indicatorsdisplaythecurrentstateofthedevice,aslisted

inthetablebelow.

Indicator Colour Status

PWR ÊOﬀ Unitispoweredoﬀ

Green Normaloperation

Blue Firmwareupdatemode

ERR ! Oﬀ Nomeasurementinprogress

Green Normaloperation

Yellow Measurementerror

Red Criticaldeviceerror

LOCK Oﬀ PID/analogoutputdisabled

Green PIDlocked

Yellow PIDengagedbutnotlocked

Red PIDoutputsaturated

Blue Analogoutputerror

2.1.1 Menu system

Themenusystemallowsforinteractivecontrolofthedevicewithout

acomputerinterface(Figure2.2). ItisstartedbypressingtheOK

buttonfromthemeasurementdisplaymode,andexitingbypressing

theleftdirectionalbutton.

Figure 2.2: Primary settings menu, showing measurement options (left)

anddevicesettings(right)whichincludesdisplaysettings.

Otros manuales para FZW600

Tabla de contenidos

Otros manuales de Instrumento de medición de MOGlabs

MOGlabs

MOGlabs FZW600 Manual de usuario

MOGlabs

MOGlabs CEL002 Manual de usuario

MOGlabs

MOGlabs CEL Manual de usuario

MOGlabs

MOGlabs CEL Manual de usuario

MOGlabs

MOGlabs MOA Manual de usuario

Manuales populares de Instrumento de medición de otras marcas

Suaoki

Suaoki D40 Manual de usuario

Elster

Elster BK-G1.6 Manual de usuario

Endress+Hauser

Endress+Hauser Deltabar FMD71 Manual

Duratool

Duratool D03128 Manual de usuario

Vega

Vega VEGAPULS 65 Manual de usuario

Tonghui

Tonghui TH2618B Manual de usuario

Tenmars

Tenmars TM-801 Manual de usuario

MSR

MSR 145 Manual de usuario

TPS

TPS WP-82 Manual de usuario

ELMETRON

ELMETRON CP-511 Manual de usuario

PCB Piezotronics

PCB Piezotronics 003C30 Manual de usuario

Tenma

Tenma 72-10465 Manual de usuario

Endress+Hauser

Endress+Hauser Proline Promag 50 Especificaciones técnicas

Siemens

Siemens SITRANS F Coriolis FCT030 Manual de lista de piezas

KLINGER

KLINGER CMF V Series Manual de usuario

EXFO

EXFO FTB-2 Manual de operación y mantenimiento

Keysight

Keysight M8290A Manual de usuario

ADTEK

ADTEK MW-5 Manual de usuario