Sorry, this product is no longer offered for sale. The recommended replacement product is ISO-FRDY-04-785-N.

Faraday Optical Isolator, Medium Power, 4 mm Aperture, 780 nm Center

The ISO-04-780-MP Faraday Optical Isolator is essentially a uni-directional light valve. It is used to protect a laser source from destabilizing feedback or actual damage from back-reflected light. This 780 nm medium power free space optical isolator is packaged in a compact cylindrically shaped magneto-optic device with a base plate for ease of mounting into an optical train. It has a 4 mm clear aperture and a 730 to 830 nm wavelength range. The ISO-04-780-MP uses a higher damage threshold BK-7 polarizing beamsplitter (PBS) and provides double escape ports for applications where rejected power exceeds 0.5 W.

SF1 Polarizing Beamsplitter (PBS) Cube

Our medium power Faraday optical isolators use high damage threshold SF1 polarizing beamsplitter (PBS) cubes.

High Efficiency Performance

The TGG crystal utilized in our Faraday isolators creates a large Verdet constant that ultimately describes the strength of the Faraday effect and provides effective isolation of back-reflected light. Additionally, these isolators have low absorption as a function of the TGG crystal and polarizers, resulting in reliable transmission of light in the forward direction.