ISO INTERNATIONAL 11145 STANDARD Fifth edition 2018-11 Optics and photonics Lasers and laser-related equipment - Vocabulary and symbols Optique et photonique-Laserset équipements associés aux lasers Vocabulaire et symboles Reference number IS0 11145:2018(E) ISO @ IS0 2018 IS011145:2018(E) COPYRIGHTPROTECTEDDOCUMENT IS02018 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 CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122.749 0111 Fax: +41 22 749 09 47 Email:[email protected] Website: www.iso.org Published in Switzerland ii IS02018-Allrights reserved IS011145:2018(E) Contents Page Foreword iv 1 Scope 1 2 Normative references. 3 Terms and definitions 1 3.1 Beam position. 2 3.2 2 Beamaxis 3.3 Beam diameter 3 3.4 Beam radius. 3 3.5 Beam width 4 3.6 Beam cross-sectionalarea 4 3.7 Beam waist 5 3.8 Divergence 7 3.9 Rayleigh length. 7 3.10 Beam parameter product 8 3.11 Coherence. 8 3.12 Polarization 9 3.13 Powerand Energy 10 3.14 Pulsedurationandrepetitionrate 11 3.15 Optical resonator. .12 3.16 Mode 12 3.17 Spectral bandwidth .12 3.18 Relative intensity noise. .13 3.19 Laser. .13 3.20 Efficiency 14 4 Symbolsandunitsofmeasurement .15 Annex A (informative) Explanation of the difference in terminology between IEC 60825-1 and IS0 11145 .17 AnnexB (informative)Listofsymbols .18 Bibliography .19 Alphabetical index .20 @ IS0 2018 - All rights reserved iii