IEC 61315 pdf download Calibration of fibre-optic power meters 1 scope This international standard is applicable to instruments measuring radiant power emitted fromsources which are typical for the fibre-optic communications industry. These sources includelaser diodes,light emitting diodes (LEDs) and fibre-type sources. The radiation may bedivergent or collimated. The standard describes the calibration of power meters to beperformed by calibration laboratories...