IEC/TR 62627‑03‑03 , which is a technical report, describes the investigation results of high-power reliability for metal-doped optical fibre plug-style attenuators.

This report contains the high-power test results for metal-doped optical fibre SC plug-style optical attenuators, the thermal simulation results and the analysis of degradation modes, long-term reliability test results under high-power conditions and the derivation of maximum limit of optical power for guaranteeing long-term operation.