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This part of IEC 61753 contains the minimum initial test and measurement requirements and severities which an optical power limiter needs to satisfy in order to be categorized as meeting the requirements of single mode fibre pigtailed style optical power limiter used in controlled environments. Optical performance specified in this standard relates to in-line type configuration power limiters only. The standard contains the minimum requirements, the details and test severities for 15 different tests. Thus, the standard provides manufacturers and users with investment security and test laboratories and manufacturers with detailed information on testing. The responsible committee is DKE/UK 412.7 "LWL-Verbindungstechnik und passive optische Komponenten" ("Fibre optic interconnecting devices and passive components") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.