RETRACTED: Fabrication and characterizations of a Gadolinium doped terbium gallium garnet crystal for Faraday rotators

Abstract

Magneto-optical materials based on Tb3Ga5O12 (TGG) crystals are providing promising opportunities for modern Faraday isolators (FIs). Gadolinium (Gd)-doped TGG (Gd:TGG) crystals with high transmittance were prepared using the Czochralski method (Cz). It is noted that as-prepared crystal presents high transmittance of 80.0% at the wavelengths of 520–1520 nm. The Verdet constants of as-grown crystal at 405.0, 533.0, 632.0, 1064.0 nm were 583.0, 230.1, 150.3, and 50.3 rad ·m−1 T−1, respectively. The measured value at 1064 nm was about 1.3 times higher than that of TGG. Thus, it has the possibility to minimize the length and magnet intensity of Faraday rotator in making FIs. The excellent characteristic makes Gd:TGG single crystal an attractive magneto-optical material.