Faraday Isolators & Rotators

For ordering please see

'How To Order'

Laser Support Services is pleased to offer a range of Faraday isolator and rotator devices from Avesta. Customer choice of active material and wavelength ensure the product is suited to your specific needs.

Faraday Isolator










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.

Please see pdf for more information.


Highly-Transparent (HT) Single Stage Isolators








Highly transparent (HT) single-stage isolators. Isolation 38-44 dB,

wavelength 400-1250 nm (fixed)

clear aperture 3-15 mm.

Transmission >90%. 


Broadband Isolators










Broadband isolators.

Isolation >38 dB.

Center wavelength - 800 nm (other designs are also available on request).

Bandwidth - 150 nm (>30 dB).

Clear aperture is 3-12 mm.

HT and SE modifications are also available.


Tunable Isolators








Peak isolation 38-42 dB.

Central wavelength - 780 nm.

Tuning range from 700 to 860 nm. O

ther wavelengths available upon request. Simple and convenient operation. 


Single Stage Isolators








Isolation 38-44 dB

wavelength from 400 to 1250 nm (fixed), bandwidth - 30 nm.

Clear aperture 3-12 mm


Double Stage Isolators








Isolation >60 dB.

Wavelength is 600 - 1150 nm (fixed).

Bandwidth - 30 nm.

Clear aperture 3-12 mm.