Investigation of diode-pumped 2.8-µm laser performance in Er:BaY2F8

Laser operation at 2.8 mm in BaY2F8 with erbium concentrations of 7.5% and 20% is investigated under laser-diode pumping at 967 nm. Output powers as high as 250 mW and slope efficiencies as high as 24% are obtained. Results are comparable with those of Er3+:LiYF4 under the same pump conditions. Slope efficiencies above 30% are predicted for optimized erbium concentrations

Modelling human choices: MADeM and decision‑making

Research supported by FAPESP 2015/50122-0 and DFG-GRTK 1740/2. RP and AR are also part of the Research, Innovation and Dissemination Center for Neuromathematics FAPESP grant (2013/07699-0). RP is supported by a FAPESP scholarship (2013/25667-8). ACR is partially supported by a CNPq fellowship (grant 306251/2014-0)

UPCONVERSION PROCESSES IN OPTICALLY PUMPED LASER CRYSTALS

No abstract availabl

Periodic absorption in monoclinic crystals

No abstract availabl

Diode-pumped Nd:BaY2F8 picosecond laser

Picosecond pulse generation at 1050 nm by a diode-pumped Nd:BaY2F8 (Nd:BaYF) active crystal has been investigated under low-power pumping (440 mW absorbed). The sample was oriented along the optical axes and cut at Brewster angle for y-axis laser polarization to minimize birefringence effects. Stable passive mode-locking operation has been achieved by inverse saturable absorption with 80-mW output power and 3.7-ps pulses

IMPROVED OPERATION OF A CW YLF LASER

We developed a cw laser in the 2 µm region operating at liquid-nitrogen (77 K) and at dry ice temperature (210K) pumped by the 514 µm line of Ar+ laser. Also we observed two walenghts (670 mm, 890 mm) that are significantly correlated with laser emission

Spectroscopy of DCN in a molecular beam using a YLF laser at 1.9 µm

A newly developed tunable YLF laser operating in the 2µm wavelength region demonstrates an output power of about 300 mW in a single longitudinal mode, combined with a high spectral purity. It has been employed for measurements of the first overtone spectrum of DCN in a molecular beam with bolometric detection, achieving a signal-to-noise ratio larger than 1000