Optical isolators are passive, non reciprocal devices that utilise the phenomenon of Magneto-Optic Rotation to isolate the source from reflections in an optical system. The heart of the device is based on a Faraday Rotator using, for example, Yttrium Iron Garnet-YIG (LPE and bulk) or Terbium Gallium Garnet-TGG single crystals.

These among other Faraday media have the ability, when in an appropriate magnetic field, to rotate the plane of linearly polarised light by an amount proportional to its length. YIG crystal is used for wavelengths from 1100 to 2100nm. TGG is utilised in several free space optical isolators for wavelengths between 500 to 1100nm.

Based on a Faraday Rotator made of Terbium Gallium Garnet single crystals offer many features and flexible design and provide superior performance when used with diode lasers, and many other sources within their wavelength ranges. These models can be used at normal incidence as input faces are angled. All units are supplied with a mounting collar which permits easy mounting and accurate alignment to the polarisation plane of a laser.

Micro miniature isolators for telecoms

I-13-MM / I-15-MM

In addition to the many different types of isolator provided here, Laser 2000 is also able to provide miniature optical isolators in a range of different formats. These micro and mini isolators provide the same different levels of isolation. Single stage, semi-double, double stage and tuneable versions are all available for telecommunications wavelengths (980nm, 1310nm, and 1550nm).

The package sizes vary, but range from packages of size 1.5mm diameter x6mm long through to 4mm x 6.6mm long. For further information about micro and mini isolators, please contact Laser 2000.

I-13-MM-1.0 on keyboard

Laser 2000 (uk) Ltd.

phone: +44 (0)1933 461 666
fax: +44 (0)1933 461 699

Laser Accessories