This part of IEC 61300-3 describes the various methods available to measure the wavelength
dependence of attenuation A(lambda) and return loss RL(lambda), of single-mode passive optical
components (POC) used in fibre-optic (FO) telecommunications. It is not, however, applicable
to dense wavelength division multiplexing (DWDM) devices. Measurement methods of
wavelength dependence of attenuation of DWDM devices are described in IEC 61300-3-29.
Definition of WDM device types is given in IEC 62074-1.
Three measurement cases are herein considered:
• Measurement of A(lambda) only;
• Measurement of RL(lambda) only;
• Measurement of A(lambda) and RL(lambda) at the same time.
These measurements may be performed in one direction (unidirectional) or bi-directionally.