Faraday rotator design for 266nm, 343nm and 355nm lasers

The continuous lasing process of a laser is sensitive to back reflected laser light, because it is disturbing the intrinsic stimulated emission process in the laser material. Faraday Isolators and Rotators are therefore commonly used to separate back reflected light from entering the laser cavity or the resonator. We present a new design of a Faraday Rotator for UV lasers with laser wavelengths of 343 and 355nm. This Faraday Rotator is suited for CW or pulsed UV lasers with typically averaged laser power up to few 10W range. In addition, we demonstrate the design option and feasibility of a 266nm Faraday Isolator.