Compact deep ultraviolet frequency-doubled Tb:LiYF lasers at 272 nm.

A new laser system has been developed to generate coherent deep ultraviolet (DUV) radiation at 272 nm. The DUV lasers were produced via intra-cavity frequency doubling of the : lasers emitting fundamentally at 544 nm. Continuous-wave (cw) and -switched operations were performed with a type I phase-matched - nonlinear crystal.

Highly efficient Er:YAP laser with 6.9 W of output power at 2920 nm.

We report on the efficient high-power operation of a laser-diode-pumped Er-doped yttrium aluminum perovskite (Er:YAP) laser in the 3 m spectral region at room temperature. 6.9 W of continuous-wave (CW) output power was obtained at 2920 nm.

Verdet constant of potassium terbium fluoride crystal as a function of wavelength and temperature.

Potassium terbium fluoride (KTF) crystal is a promising magneto-active material for creating multi-kilowatt average-power Faraday isolators operating at the visible and near-infrared wavelengths. Nevertheless, the key material's parameter needed for the design of any Faraday isolator-the Verdet constant, has not been comprehensively investigated yet. In this Letter, we report on measurement of the Verdet constant of the KTF crystal for wavelengths between 600 and 1500 nm and for temperatures ranging from 15 to 295 K.

Efficient Pr:YAlO lasers at 622 nm, 662 nm, and 747 nm pumped by semiconductor laser at 488 nm.

We report laser operation of Pr:YAlO pumped by a frequency-doubled optically pumped semiconductor laser. Continuous-wave laser oscillations at around 622 nm, 662 nm, and 747 nm were demonstrated in plano-concave or/and plano-plano cavities. The maximum slope efficiencies were found to be 37%, 35%, and 59%, respectively, which are record-high values for Pr:YAlO lasers.

Photo- and thermo-activated electron transfer system based on a luminescent europium organic framework with spectral response from UV to visible range.

A dual stimuli-responsive system was constructed by introducing methyl viologen into a luminescent europium-organic framework with a compact packing mode. In addition to absorption and emission properties that are sensitive to both light and heat involving electron/energy transfer processes, the photoactive MOF has a spectral response from UV to the visible region.

Photo- and thermally induced coloration of a crystalline MOF accompanying electron transfer and long-lived charge separation in a stable host-guest system.

A new type of electron transfer (ET) system was built via the combination of a highly stable MOF host framework and methyl viologen guest molecule. The π-stacking arrangements adjust the distance between the D-A components, contributing to the formation of an ultra long-lived charge separated state in the photo/thermo dual stimuli-responsive complex.