Magnetooptical spectrometer based on photoelastic modulator with optical feedback and its application in study of f-electron materials

Abstract A spectroscopic apparatus for measurement of magnetooptical and optical properties of f-electron materials has been designed and established using a polarization modulation technique based on photoelastic modulator with optical feedback. The magnetooptical system is able to provide a sensitivity of 0.004 arc-deg at the wavelength of 380 nm. The versatile applications of the spectrometer have been verified by the measurements of the magnetic circular polarized luminescence and Faraday rotation angle in holmium- and terbium-containing garnet crystals.