Abstract
Mid-IR Nd 3+ transitions perspective for laser oscillation were analyzed in the CaGa 2S 4, PbGa 2S 4, and PbCl 2 crystals and compared with low phonon fluoride crystals. Fluorescence kinetics decay of the high-lying 4G 7/2 and 4G 5/2; 2G 7/2 and low-lying 4I J levels and its temperature dependence in the range of 13–295 K were measured. For 5 μm mid-IR transitions of Nd 3+ the radiative relaxation rates are found to be several times higher and multiphonon relaxation (MR) rates are several times lower in lead and calcium thiogallate crystals compared to low phonon fluoride crystals. MR rate dependence on the Nd 3+ to the nearest ligand distance R 0 is established experimentally and analyzed in the frame of point-charge model of nonlinear theory of multiphonon relaxation. Mid-IR Nd 3+ 4–5.5 μm fluorescence spectra of 4I i – 4I j transitions perspective for laser oscillation were measured for the first time in the studied crystals.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
