Improvements of Wavelength and Temperature Dependences of Faraday Rotation of Bismuth-Substituted Rare Earth Iron Garnet Single Crystals in Optical Communication Band
来源期刊：Journal of Rare Earths2006年第S2期
论文作者：黄敏 凌俐
文章页码：58 - 61
摘 要：This paper was concerned with the preparation and magneto-optical properties of the Bi, Tb and Yb partially substituted rare earth ferrite garnet bulk single crystals of Tb3-x-yYbyBixFe5O12. Here we focused our studies on improvements of the wavelength and temperature dependences of Faraday rotation （FR） in optical communication band by combining two types of bismuth substituted ferrite garnets with opposite FWC and FTC signs. The Faraday rotation and optical absorption spectra were measured and discussed in optical communication band. The specific FR of Tb0.91Yb1.38Bi0.71Fe5O12 crystal under magnetic field at saturation is found to be about -1617 （°）·cm-1 at λ=1.55 μm, Faraday rotation wavelength coefficient （FWC, 0.009%·nm-1） in the wavelength range of 1.50～1.62 μm and Faraday rotation temperature coefficient （FTC, 3.92×10-5·K-1） at λ=1.55 μm are much smaller than that of YIG. It is found empirically that there is a simple relationship between Faraday Rotation θf （x） and Bi content x for Tb3-x-yYbyBixFe5O12, which is given by θf（x）=（-2759x+400） （°）·cm-1 in optical communication band.
黄敏，凌俐
摘 要：This paper was concerned with the preparation and magneto-optical properties of the Bi, Tb and Yb partially substituted rare earth ferrite garnet bulk single crystals of Tb3-x-yYbyBixFe5O12. Here we focused our studies on improvements of the wavelength and temperature dependences of Faraday rotation （FR） in optical communication band by combining two types of bismuth substituted ferrite garnets with opposite FWC and FTC signs. The Faraday rotation and optical absorption spectra were measured and discussed in optical communication band. The specific FR of Tb0.91Yb1.38Bi0.71Fe5O12 crystal under magnetic field at saturation is found to be about -1617 （°）·cm-1 at λ=1.55 μm, Faraday rotation wavelength coefficient （FWC, 0.009%·nm-1） in the wavelength range of 1.50～1.62 μm and Faraday rotation temperature coefficient （FTC, 3.92×10-5·K-1） at λ=1.55 μm are much smaller than that of YIG. It is found empirically that there is a simple relationship between Faraday Rotation θf （x） and Bi content x for Tb3-x-yYbyBixFe5O12, which is given by θf（x）=（-2759x+400） （°）·cm-1 in optical communication band.
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