A Faraday isolator (FI) is a nonreciprocal optical device which transmits the linearly polarized light in one direction and deflects the backward beam. It usually consists of a Faraday rotator and two polarizers. The Faraday rotator is made of magneto-optical active material which is placed into the permanent magnet system (Nd-Fe-B). Two types of the magneto-optical active materials are available: Terbium-doped glass, Terbium-Gallium-Garnet (TGG) crystals.
The isolator protects a laser source by attenuating the reflected and backscattered light by several orders of magnitude (10^6 to 10^6). It is also used when some devices have extreme sensitivity to optical feedback which can cause intensity instabilities, frequency pulling and other undesirable effects.
We offer a variety of optical isolator models:
Please specify the desired clear aperture, isolator type (above) and wavelength with your enquiry. Please also specify the rod type (TGG or Glass).
TGG rods have higher breakdown threshold than Glass rods.
Typical isolator models and their specification are given in the PDF Datasheet.