1.  Home
  2. Whitepapers
  3. Measurement of Polarization-Dependent Loss for Plane Diffraction Grating

Measurement of Polarization-Dependent Loss for Plane Diffraction Grating

Download Whitepaper

Measurement of Polarization-Dependent Loss for Plane Diffraction Grating

Download Whitepaper
Components in fiber-optic telecommunications networks must be insensitive to changes in the polarization state of the signal, a requirement that is particularly challenging for surface-relief Diffraction Grating since those with metallic coatings tend to polarize the light incident on them. The measurable quantity used to evaluate the sensitivity of a network component to changes in polarization is called polarization-dependent loss (PDL).At Richardson Gratings, PDL is determined by separately measuring the P- and S-plane diffraction efficiencies and then substituting the relevant values into the above Equation. These independent measurements, each made with linearly polarized incident light, thus generate values of EP and ES. These measurements may be of absolute or relative efficiency (provided this is done consistently).

Download Whitepaper Now