Fibre optic interconnecting devices and passive components. Basic test and measurement procedures - Examinations and measurements. Wavelength dependence of attenuation and return loss of single mode components

Fibre optic interconnecting devices and passive components. Basic test and measurement procedures - Examinations and measurements. Wavelength dependence of attenuation and return loss of single mode components

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1   Scope

This part of IEC 61300‑3 describes the various methods available to measure the wavelength dependence of attenuation A(λ) and return loss RL(λ), 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(λ) only;
  • • Measurement of RL(λ) only;
  • • Measurement of A(λ) and RL(λ) at the same time.
These measurements may be performed in one direction (unidirectional) or bi-directionally.