FprEN ISO 12005

Lasers and laser-related equipment - Test methods for laser beam parameters - Polarization (ISO/FDIS 12005:2022)

Laser und Laseranlagen - Prüfverfahren für Laserstrahlparameter - Polarisation (ISO/FDIS 12005:2022)

Dieses Dokument legt ein verhältnismäßig einfaches und schnelles Verfahren zur Bestimmung des Polarisa¬tionszustandes und, soweit möglich, des Polarisationsgrades für den Strahl eines Dauerstrich-Lasers (cw, en: continuous wave) fest, das lediglich ein Mindestmaß an Ausrüstung erfordert. Es kann auch auf repetitiv gepulste Laser angewandt werden, wenn sich deren Ausrichtung des elektrischen Feldvektors von Puls zu Puls nicht ändert.
Dieses Dokument definiert ebenfalls das Verfahren zur Bestimmung der Richtung der Schwingung des elek¬trischen Feldvektors für den Fall (vollständig oder teilweise) linear polarisierter Laserstrahlen. Es wird angenommen, dass die Laserstrahlung quasi-monochromatisch und für den Messzweck hinreichend stabil ist. Dieses Dokument ist anwendbar für Strahlung die eine einheitliche Polarisation über ihre gesamte Quer¬schnittsfläche aufweist.
Die Kenntnis des Polarisationszustandes kann für einige Anwendungen von Lasern mit hohem Divergenz¬winkel sehr wichtig sein, zum Beispiel, wenn der Strahl eines solchen Lasers mit polarisationsabhängigen Vor¬richtungen (wie polarisationserhaltenden Fasern) gekoppelt wird. Dieses Dokument ist nicht nur für schmale und fast kollimierte Strahlen anwendbar, sondern auch für hochdivergente Strahlen sowie für Strahlen mit großen Aperturen.

Lasers et équipements associés aux lasers - Méthodes d'essai des paramètres du faisceau laser - Polarisation (ISO/FDIS 12005:2022)

Laserji in laserska oprema - Preskusne metode za parametre laserskega žarka - Polarizacija (ISO/FDIS 12005:2022)

General Information

• Status: Not Published
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: CEN/TC 123 - Lasers and photonics
• Current Stage: 6055 - CEN Ratification completed (DOR) - Publishing
• Due Date: 21-May-2022
• Completion Date: 21-May-2022
• Ref Project: kSIST FprEN ISO 12005:2022 - Lasers and laser-related equipment - Test methods for laser beam parameters - Polarization (ISO/FDIS 12005:2022)

RELATIONS

• Revised: EN ISO 12005:2003 - Lasers and laser-related equipment - Test methods for laser beam parameters - Polarization (ISO 12005:2003)
• Effective Date: 11-Dec-2019

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 12005:2021
01-junij-2021
Laserji in laserska oprema - Preskusne metode za parametre laserskega žarka -
Polarizacija (ISO/DIS 12005:2021)
Lasers and laser-related equipment - Test methods for laser beam parameters -
Polarization (ISO/DIS 12005:2021)

Laser und Laseranlagen - Prüfverfahren für Laserstrahlparameter - Polarisation (ISO/DIS

12005:2021)
Lasers et équipements associés aux lasers - Méthodes d'essai des paramètres du
faisceau laser - Polarisation (ISO/DIS 12005:2021)
Ta slovenski standard je istoveten z: prEN ISO 12005
ICS:
31.260 Optoelektronika, laserska Optoelectronics. Laser
oprema equipment
oSIST prEN ISO 12005:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 12005:2021
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oSIST prEN ISO 12005:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 12005
ISO/TC 172/SC 9 Secretariat: DIN
Voting begins on: Voting terminates on:
2021-04-08 2021-07-01
Lasers and laser-related equipment — Test methods for
laser beam parameters — Polarization

Lasers et équipements associés aux lasers — Méthodes d'essai des paramètres du faisceau laser —

Polarisation
ICS: 31.260
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 12005:2021(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2021
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oSIST prEN ISO 12005:2021
ISO/DIS 12005:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
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Published in Switzerland
ii © ISO 2021 – All rights reserved
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oSIST prEN ISO 12005:2021
ISO/DIS 12005:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Test method for state of polarization .............................................................................................................................................. 3

4.1 Principle of measurement ............................................................................................................................................................. 3

4.2 Equipment arrangement ................................................................................................................................................................ 4

4.2.1 General...................................................................................................................................................................................... 4

4.2.2 Special arrangement for the testing of beams with large divergence angles .............. 4

4.2.3 Special arrangement for the testing of beams with large apertures ................................... 5

4.3 Components ............................................................................................................................................................................................... 5

4.3.1 Radiation detector .......................................................................................................................................................... 5

4.3.2 Linear polarizer ................................................................................................................................................................ 5

4.3.3 Quarter-wave plate ........................................................................................................................................................ 6

4.3.4 Optical attenuator ........................................................................................................................................................... 6

4.4 Test procedure ......................................................................................................................................................................................... 6

4.4.1 General...................................................................................................................................................................................... 6

4.4.2 Measurement 1 (see Figure 1) ............................................................................................................................. 6

4.4.3 Measurement 2 (see Figure 2) ............................................................................................................................. 7

4.5 Analysis of the results ....................................................................................................................................................................... 7

5 Test report ................................................................................................................................................................................................................... 8

Annex A (informative) Complete description of the polarization status of a monochromatic

laser beam ................................................................................................................................................................................................................10

Bibliography .............................................................................................................................................................................................................................13

© ISO 2021 – All rights reserved iii
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oSIST prEN ISO 12005:2021
ISO/DIS 12005:2021(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 172, Optics and Photonics, Subcommittee

SC 9, Laser and electro-optical systems.

This third edition cancels and replaces the second edition (ISO 12005:2003), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— Description errors in subclause 4.5 (Analysis of the results) were corrected.

— Definitions of the “degree of polarization” and the “degree of linear polarization” were made clear.

— Definition of extinction ratio was changed.

— Previous subclause 3.3 (direction of polarization) and subclause 3.4 (plane of polarization) were

deleted, because these terms are confusing due to the different definitions, and they are not

necessarily required for this document.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
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oSIST prEN ISO 12005:2021
ISO/DIS 12005:2021(E)
Introduction

This document specifies a relatively quick and simple method, requiring minimum equipment, for

determining the state of polarization of a laser beam.

This method is for well-polarized laser beams, including those emitted by lasers with a high divergence

angle. However, if more completeness in the determination of the polarization status is required, the use

of a more sophisticated analysing device is necessary. Although not within the scope of this document,

the principle of operation of such devices is given in Annex A, together with a description of the Stokes

parameters which are needed in that case.
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oSIST prEN ISO 12005:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 12005:2021(E)
Lasers and laser-related equipment — Test methods for
laser beam parameters — Polarization
1 Scope

This document specifies a method for determining the polarization status and, whenever possible,

the degree of polarization of the beam from a continuous wave (cw) laser. It can also be applied to

repetitively pulsed lasers, if their electric field vector orientation does not change from pulse to pulse.

This document also specifies the method for determining the direction of the electric-field vector

oscillation in the case of linearly polarized (completely or partially) laser beams. It is assumed that the

laser radiation is quasimonochromatic and sufficiently stable for the purpose of the measurement. This

document is applicable to radiation that has uniform polarization over its cross-sectional area.

The knowledge of the polarization status can be very important for some applications of lasers with a

high divergence angle, for instance when the beam of such a laser shall be coupled with polarization

dependent devices (e.g. polarization maintaining fibres). This document also specifies a method

for the determination of the state of polarization of highly divergent laser beams, as well as for the

measurement of beams with large apertures.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 11145, Optics and photonics — Lasers and laser-related equipment — Vocabulary and symbols

ISO 11554, Optics and photonics — Lasers and laser-related equipment — Test methods for laser beam

power, energy and temporal characteristics
IEC 61315, Calibration of fibre-optic power meters
CIE 059-1984, Definitions and Nomenclature, Instrument Polarization
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 11145, ISO 11554, IEC 61315,

CIE 059-1984 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
polarization
restriction of oscillations of the electric field vector to certain directions

Note 1 to entry: This is a fundamental phenomenon which can be explained by the concept that electromagnetic

radiation is a transverse wave motion, i.e. the oscillations are at right angles to the direction of propagation. It is

customary to consider these oscillations as being those of the electric field vector.

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oSIST prEN ISO 12005:2021
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3.2
state of polarization

classification of polarization as linear, random, circular, elliptical or unpolarized

3.3
ellipticity
b/a

ratio of the minor semiaxis b to the major semiaxis a of the ellipse

Note 1 to entry: The ellipse is described by the motion of the terminal point of the electric field vector in a

transverse plane to the direction of radiation propagation (see Annex A).
3.4
ellipticity angle
angle whose tangent is the ellipticity; i.e. tanε = b/a

Note 1 to entry: The ellipticity angle is constrained to - 45° ≤ ε ≤ + 45°. When ε = ± 45° the polarization is circular

and when ε = 0° the polarization is linear (see Annex A).
3.5
azimuth

angle between the major axis of the instantaneous ellipse and a reference axis perpendicular to the

direction of propagation
Note 1 to entry: See Annex A.
3.6
linear polarizer

optical device whose output is linearly polarized, without regard to the status and degree of polarization

of the incident radiation
3.7
extinction ratio
measure of the quality of the linear polarizer

Note 1 to entry: If perfectly linearly polarized radiation is incident on a polarizer, then the extinction ratio of the

polarizer is given by
τ ρ
max max
r = or
τ ρ
min min
where
τ (ρ ) is the maximum transmittance (reflectance)
max max
τ (ρ ) is the minimum transmittance (reflectance)
min min
of power (energy) through (from) the linear polarizer.
Note 2 to entry: The extinction ratio is often described in the following form:
τ ρ
max max
r = :1 or :1
τ ρ
min min
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oSIST prEN ISO 12005:2021
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3.8
polarization ratio

< laser beam > measure of the linear polarization for completely or partially polarized laser beams

Note 1 to entry: See 4.4.2.
3.9
quarter-wave plate

optical device which resolves a completely polarized incident beam of radiation into two orthogonally

polarized components and introduces a 90° phase shift between them
3.10
Stokes parameters

set of four real quantities, which completely describe the polarization state of monochromatic or

quasimonochromatic radiation

Note 1 to entry: The parameters are, collectively, known as the Stokes vector, a 4 × 1 vector (see Annex A for a

complete description and formulae for Stokes parameters).
3.11
degree of polarization

ratio of the beam power (or energy) of the completely polarized component to the total beam power

(or energy)
3.12
degree of linear polarization

ratio of the difference to the sum of beam powers P (energies Q) in the direction x of maximum

transmission and the direction y of minimum transmission through the linear polarizer

PP− QQ−
xy xy
p = or
PP+ QQ+
xy xy

Note 1 to entry: The measured beam powers P and P and measured beam energies Q and Q are defined in 4.4.2.

x y x y
4 Test method for state of polarization
4.1 Principle of measurement
The first test for laser beam pola
...