Magnetic circular dichroism and optical absorption spectra of holmium-doped fluorozirconate (ZBLAN) glass: a prospective study

The magnetic circular dichroism (MCD) and optical absorption spectra are recorded for Ho3+ ions in fluorozirconate (ZBLAN) glass. The measurements cover the spectral region from 14 000 cm−1 to 40 000 cm−1. The dipole strengths of the optical transitions are given and compared with holmium ions in other matrices. The Faraday (or MCD) parameters are determined by the method of moment analysis. The most striking feature of the MCD spectrum is the dominance of the temperature-dependent C terms.