This document is applicable to instruments measuring radiant power emitted from sources that are typical for the fibre-optic communications industry. These sources include laser diodes, light emitting diodes (LEDs) and fibre-type sources. Both divergent and collimated radiations are covered. This document defines the calibration of power meters to be performed by calibration laboratories or by power meter manufacturers.Cross References:IEC 60793-2EN 60793-2ISO/IEC Guide 98-3:2008IEC/TR 61931:1998GUM:1995IEC 61280-4-1IEC 60793-1-1IEC 60825-2IEC TR 61930ISO/IEC 17025EN 60793-1-1IEC 60825-1EN 60825-2EN 60825-1EN ISO/IEC 17025EN 61280-4-1EN 61040:1992ISO/IEC Guide 99:2007IEC 60793-1-43:2015EN 60793-1-43:2015IEC 61300-3-2:2009IEC 61040:1990IEC 60050-731:1991EN 61300-3-2:2009EN 60359:2002All current amendments available at time of purchase are included with the purchase of this document.