Faraday Optical Isolator, Low Power, 4 mm, 650 nm, 1/2 Wave Plate.

The ISO-04-650-LP-W 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 650 nm low 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 630 to 700 nm wavelength range. The ISO-04-650-LP utilizes field proven, high efficiency Corning Polarcor™ polarizers; ideal for laser diode applications. This -W version has an added 1/2 wave plate at the output stage, so that the direction of polarization of the output beam can be rotated to a desired direction.