Yb:LuAlO crystal as a gain medium for efficient broadband chirped pulse regenerative amplification.

The experimental study results of a chirped pulse amplification regime are reported for the Yb:LuAlO crystal with different polarization states in the gain media for the first time, to the best of our knowledge. Maximum output power of 5 W with 565 fs pulse duration was obtained for E//b-polarization at a 200 kHz repetition rate seeded by a 98 fs Yb:KYW oscillator. 165 fs pulses with output power of 4.

Consequences of Ca Codoping in YAlO :Ce Single Crystals.

The influence of Ca codoping on the optical absorption, photo-, radio-, and thermo-luminescence properties of YAlO :Ce (YAP:Ce) crystals has been studied for four different calcium concentrations ranging from 0 to 500 ppm. Ca codoping results in a partial oxidation of Ce into Ce , The luminescence time response under pulsed X-ray excitation of the Ce /Ce admixure clearly demonstrates the role of hole migration on both the rise time and the generally observed slow components. From an application point of view, Ca codoping significantly improves the timing performances, but the induced presence of Ce ions is also the cause of a reduction in scintillation efficiency.

Spectroscopy and continuous wave laser performance of Yb:LuAlO crystal.

Crystal growth, polarized spectroscopic properties, lifetime measurements, and CW laser performance under diode pumping of a new Yb-doped LuAlO crystal (Yb:LuAP) are reported for the first time, to the best of our knowledge. The maximum absorption cross section of 6.6·10  cm at 978.

Yb:CaYAlO-based chirped pulse regenerative amplifier.

The results of an experimental study of the chirped pulse amplification regime are reported for the Yb:CaYAlO crystal with different polarization states in the gain media for the first time, to the best of our knowledge. A maximum output power of 4.2 W with 310 fs pulse duration was obtained for σ-polarization at 200 kHz repetition rate seeded by a 85 fs Yb:KYW oscillator.

Anomalous discrete disorder response of high-symmetry impurity centers spectra in garnet solid solutions.

The zero-phonon electronic transitions in Cr(3+) and Ce(3+) impurity ions in a series of Lu3xY3-3xAl5O12 (0 < x < 1) garnet solid solution crystals were studied experimentally. It was observed that in contrast to the case of Ce(3+), the modification of zero-phonon R-line ((2)E-(4)A2) fluorescence spectra of Cr(3+) ions with changing x occurs in a discrete fashion and is not accompanied by strong inhomogeneous broadening, as usually happens in solid solutions. The effect is ascribed to the high C3i symmetry of the Cr(3+)(Al(3+)) sites that allows only a limited number of non-equivalent Cr(3+) centers in a mixed environment.