Faraday Isolators & Rotators
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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.
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.
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.
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.