Faraday isolator with 33 dB isolation degree at the 1.5 kW CW laser power

This paper experimentally investigated Faraday isolator (FI) assembled by the scheme with the internal thermally induced depolarization compensation and temperature stabilization of MOE using water cooling. The scheme of a Faraday isolator was proposed, and the main idea was to replace one 45° Faraday rotator by two identical 22.5° rotators and a 67.5° reciprocal polarization rotator placed between them.