Spectroscopy and Kerr-lens mode-locked operation of Yb:GdScO crystal.

A Kerr-lens mode-locked laser based on a Yb-doped disordered gadolinium scandate (Yb:GdScO) crystal is reported for the first time, to the best of our knowledge. The crystal with the perovskite structure was grown using the Czochralski method, and its room temperature (RT) and low temperature (LT) spectra were also investigated. Due to the crystal's multisite structure (Gd/Sc site), Yb:GdScO offers broad and intense polarized emission spectra in the near-infrared range (975-1075 nm).

A compact detector system for simultaneous measurements of the light yield non-linearity and timing properties of scintillators.

This work presents an outline of a detection system that employs the Compton spectrometer method to assess the non-linearity of scintillator light yield. A novel approach is introduced, leading to more accurate measurements through the separate determination of the intrinsic light output parameters and the non-linearity of the scintillators. Key features of this system include the use of a portable scintillation detector with three photomultiplier tubes for precise measurement of the average number of detected photoelectrons and the incorporation of recent advancements in correction techniques for accidental coincidences.

Efficient continuous wave and broad tunable lasers with the Tm:GdScO crystal.

The spectroscopic properties and tunable laser performances of the orthorhombic perovskite Tm:GdScO crystal grown by the Czochralski method are comparatively studied for polarization along different crystallographic axes. The polarized emission spectrum of Tm:GdScO along the b-axis exhibits, to the best of our knowledge, the broadest bandwidth among all the single Tm-doped bulk gain media, indicating the strong inhomogeneous line broadening of Tm ions in GdScO and thus leads to a broad and smooth gain spectrum. Tunable laser operation with a tuning range as broad as 321 nm from 1824 nm to 2145 nm is achieved, which indicates its potential for few-optical-cycle pulse generation in the 2-µm spectral range.

Ho:LuAG single crystal fiber: growth, spectroscopy and laser characteristics.

Lutetium aluminum garnet single-crystal fiber (SCF, ∼ Φ 0.9 mm - 165 mm) doped with 0.5 at.