Temperature Dependence of Faraday Rotation of Glass Optical Fibers Doped with Quantum Dots of CdSe and CdMnTe

Specialty optical fibers incorporated with CdSe and CdMnTe quantum dots are fabricated using the modified chemical vapor deposition and high temperature fiber drawing process. Temperature dependence of Faraday rotation angle (FRA) is investigated under magnetic field of 0.126 Tesla (T) upon temperature change from 25 to 120 °C. The FRAs of the CdSe and CdMnTe doped fibers are found to increase linearly with magnetic field and no appreciable change in the FRA of the CdSe doped fiber with the increase of temperature is found regardless of the magnetic field as compared to the CdMnTe doped fiber. Average temperature dependence of the FRA are 16.40 × 10−4 and −104.90 × 10−4 degree °C−1 at 0.126 T for the CdSe and CdMnTe doped fibers and the resultant Verdet constants are estimated to be 3.75 ± 0.04 and 3.50 ± 0.12 rad T−1 m−1, respectively. Temperature dependence of Faraday rotation angle of the fabricated CdSe and CdMnTe doped fibers is investigated under magnetic field of 0.126 Tesla (T) upon temperature change from 25 to 120 °C. The temperature dependent Verdet constant of the CdSe and CdMnTe doped fibers are 3.25 × 10−4 and −20.76 × 10−4 rad T−1 m−1 °C−1, respectively.