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An Overview of Polarization Extinction Ratio Measurement Methods

Application Note

Polarization extinction ratio (PER) is a measure of the degree to which light is confined in a principal linear polarization mode. It is defined as the ratio of the power in the principal polarization mode to the power in the orthogonal polarization mode after propagation through a device or system, expressed in dB.

There are several methods of measuring PER. The most suitable method depends on the application. In this application note, you will learn more about these three methods:

  • Rotating Polarizer Method
  • Polarimeter Method
  • Distributed Polarization Crosstalk Measurement Method

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