The Verdet constant dispersion of CeF3 crystal was measured in the spectral range from 0.45 to 1.95 μm. To the best of our knowledge, CeF3 crystal was investigated for the first time as a potential material candidate for near-infrared Faraday rotators (FRs). The experimental results obtained for Verdet constant dispersion were compared to other magneto-optical materials with the conclusion that CeF3 crystal possesses up to 60% higher Verdet constant in the near-infrared spectral region 1.1 to 1.5 μm compared to widely used terbium gallium garnet crystal. Furthermore, the presented experimental setup is capable of high precision measurement of Verdet constant dispersion in a broad spectral range, with measurement error not exceeding 5%, therefore, representing a powerful tool for FRs development.
In this paper, we investigated laser performance of Er:Y<sub>2</sub>O<sub>3</sub> ceramics at room temperature. With pulsed pumping with duty cycle of 1%, 1.02 W of peak output power was obtained at wavelength of 2.7 μm with slope efficiency of 3%. Furthermore, absorption spectra of the ceramics and temperature evolution for different pumping conditions were examined.
The laser-induced damage thresholds in silica glasses at different temperature conditions (123 K - 473 K) by Nd:YAG
laser fundamental (wavelength 1064 nm) and third harmonic (wavelength 355 nm) 4 ns of pulses were measured. In the
results, the damage thresholds increased at low temperature. At 1064 nm, the temperature dependence became strong by
the concentration of impurities. However, at 355 nm, the temperature dependences of almost sample were almost the
same for different concentration of impurities.
We have been developing a high average-power laser system for science and industry applications that can generate an output of 20 J per pulse at 10-Hz operation. Water-cooled Nd:glass zig-zag slab is pumped with 803-nm AlGaAs laser-diode modules. To efficiently extract energy from the laser medium, the laser beam alternately passes through dual zig-zag slab amplifier modules. Twin LD modules equipped on each slab amplifier module pump the laser medium with a peak power density of 2.5 kW/cm<sup>2</sup>. In high power laser system, thermal load in the laser medium causes serious thermal effects. We arranged cladding glasses on the top and bottom of the laser slab to reduce thermal effects.