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Content DescriptionIEC 60747-5-4:2022+AMD1:2024 CSV specifies the terminology, the essential ratings and characteristics as well as the measuring methods of semiconductor lasers.This edition includes the following significant technical changes with respect to the previous edition: - References for the terms and definitions related to the lighting area, IEC 60050-845, are revised based on IEC 60050-845:2020; - Emission angle is changed to radiation angle in 3.3.2; - Definitions of rise time and fall time in 3.4.1 are revised based on the publication IEC 60050-521:2002; - Spectral linewidth is added to Table 1 in Clause 4; - Conditions for carrier-to-noise ratio of Table 1 in Clause 4 is amended. - Error in the equation for carrier-to-noise ratio in 5.2.2 is corrected; - Precaution against the equipment used for carrier-to-noise ratio measurement is added in 5.2.2; - Explanation for the measurement method of the small signal cut-off frequency in 5.3.2 of the first edition is deleted because it has been defined in the latest version of ISO 11554; - Reference document for the lifetime in 5.4 is amended; - Precaution against the measuring arrangement used for the half-intensity width and 1/e2-intensity is added in 5.5.3; - Reference tables in Annex A, Annex B and Annex C are revised by following the latest version of ISO publications. About IECThe IEC is a global, not-for-profit membership organization, whose work underpins quality infrastructure and international trade in electrical and electronic goods. The IEC facilitates technical innovation, affordable infrastructure development, efficient and sustainable energy access, smart urbanization and transportation systems, climate change mitigation, and increases the safety of people and the environment.
The IEC brings together ~170 countries and provides a global, neutral and independent standardization and conformity assessment platform for 30 000 experts globally. It administers 4 Conformity assessment systems whose members certify that devices, systems, installations, services and people work as required.
The IEC publishes around 10 000 IEC International Standards which together with conformity assessment provide the technical framework that allows governments to build national quality infrastructure and companies of all sizes to buy and sell consistently safe and reliable products in most countries of the world. IEC International Standards serve as the basis for risk and quality management and are used in testing and certification to verify that manufacturer promises are kept. |
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