IEC PAS 62129:2004

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PAS 62129
SPECIFICATION
First edition
Pre-Standard
2004-03
Calibration of optical spectrum analyzers

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IEC/PAS 62129:2004(E)
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PUBLICLY
IEC
AVAILABLE
PAS 62129
SPECIFICATION
First edition
Pre-Standard
2004-03
Calibration of optical spectrum analyzers

© IEC 2004 ⎯ Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – PAS 62129 © IEC:2004 (E)

CONTENTS
FOREWORD.5

1 Scope.5

2 Normative references.5

3 Definitions .6

4 Calibration test requirements .9

4.1 Preparation.9
4.2 Reference test conditions .10
4.3 Traceability.10
5 Resolution bandwidth (spectral resolution) test.10
5.1 Overview .10
5.2 Resolution bandwidth (spectral resolution) test.10
5.2.1 Equipment for resolution bandwidth (spectral resolution) test.11
5.2.2 Test procedure for resolution bandwidth (spectral resolution) .12
6 Displayed power level calibration .13
6.1 Overview .13
6.2 Displayed power level (DPL) calibration under reference conditions.13
6.2.1 Equipment for DPL calibration under reference conditions .13
6.2.2 Test procedure for DPL calibration under reference conditions .14
6.2.3 Calculation of DPL uncertainty under reference conditions .14
6.3 Displayed power level (DPL) calibration for operating conditions .15
6.3.1 Wavelength dependence.15
6.3.2 Polarization dependence.16
6.3.3 Linearity.18
6.3.4 Temperature dependence .19
6.4 Calculation of expanded uncertainty in displayed power level .20
7 Wavelength calibration.21
7.1 Overview .21
7.2 Wavelength calibration under reference conditions.21
7.2.1 Equipment for wavelength calibration under reference conditions .21
7.2.2 Test procedure for wavelength calibration under reference conditions .22
7.2.3 Calculations of wavelength uncertainty under reference conditions .22

7.3 Wavelength calibration for operating conditions.23
7.3.1 Wavelength dependence.23
7.3.2 Temperature dependence .24
7.4 Calculation of expanded uncertainty in wavelength.25
8 Documentation .25
8.1 Measurement data and uncertainty .25
8.2 Measurement conditions .26
Annex A (normative) Mathematical basis for calculation of calibration uncertainty .27
A.1 Deviations .27
A.2 Uncertainty type A .27
A.3 Uncertainty type B .28
A.4 Accumulation of uncertainties .29
A.5 Reporting .30

PAS 62129 © IEC:2004 (E) – 3 –

Annex B (informative) Examples of calculation of calibration uncertainty.31

B.1 Displayed power level calibration .31

B.1.1 Uncertainty under reference conditions: σ .31
∆Pref
B.1.2 Uncertainty under operating conditions.32

B.1.3 Expanded uncertainty calculation .35

B.2 Wavelength calibration .35

B.2.1 Uncertainty under reference conditions: σ .35
∆λref
B.2.2 Uncertainty under operating conditions.36

B.2.3 Expanded uncertainty calculation .37

Annex C (informative) Using the calibration results .39

C.1 General .39
C.1.1 Scope 39
C.1.2 Parameters.39
C.1.3 Restrictions .39
C.2 Additive corrections .39
C.2.1 Parameters.39
C.2.2 Measurements close to a calibration reference wavelength.40
C.2.3 Measurements at other wavelengths .40
C.3 Multiplicative corrections.41
C.3.1 Parameters.41
C.3.2 Measurements close to a calibration reference wavelength.41
C.3.3 Measurements at other wavelengths .41
C.4 OSA calibration results (additive correction).42
Annex D (informative) Wavelength references .44
D.1 Gas laser lines .44
D.2 Noble gas reference lines .44
D.3 Molecular absorption lines .45
D.4 Reference documents.48
Annex E (informative) Further reading and references for calibration of wavelength
scale.49

– 4 – PAS 62129 © IEC:2004 (E)

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
CALIBRATION OF OPTICAL SPECTRUM ANALYZERS

FOREWORD
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