What Is a Polarization Rotator?

Polarization rotators control the angle at which optic light is directed.

One important aspect of optical light is the state of polarization, or the way in which a single wave of light is restricted in the direction of vibration. A polarization rotator is used to propagate light along the optic axis.

Purpose

Optical fibers are not perfectly circular, and the polarization is split into two different components that spread at different speeds. Polarization rotators are used to continuously rotate the polarization of input beams of electromagnetic energy at a certain, predetermined angle.

Polarization

Optical polarization is a part of an optical signal in an optical system. In communication systems that use optical fiber, polarization-dependent effects can impact performance and proper operation of the optical system.

Uses

Polarization rotators are used in various applications, including laser rods, three-dimensional stereovision video applications and electron linear accelerators.

References

• Electronics Manufacturers: Polarization Rotator
• MeadowLark Optics, Inc: Basic Polarization Techniques and Devices
• Princeton University: Polarization
• Ray-Optics: Polarization Optics Tutorial