Andre V. Butashin

Femtosecond continuously tunable second harmonic generation over the entire-visible range in orthorhombic acentric Gd2(MoO4)3 crystals

Second harmonic generation over the entire visible range in Nd3+ doped and undoped Gd2(MoO4)3 crystals under ultrashort hypercontinuum pumping is presented. The continuous tuning ranges from 487 to 790 nm in a single crystal.

Room-temperature 3.4- mum Dy:BaYb(2)F(8) laser.

We have demonstrated a room-temperature laser on the (6)H(13/2) - (6)H(15/2) transition of Dy(3+) in Dy:BaYb(2)F(8) at 3.40 mum . A pulsed 1.3-microm Nd:YAG laser was used as the pump. Our measured spontaneous-emission spectrum for the (6)H(13/2) - (6)H(15/2) band indicates that this laser should be continuously tunable between 3.0 and 3.4 mum .

Orthorhombic (LiNbGeO5): efficient stimulated Raman scattering and tunable near-infrared laser emission from chromium doping

Abstract The structural, optical, spectroscopic, and laser properties of pure and chromium-doped lithium–niobium germanate (LiNbGeO 5 ) single crystals are discussed in this paper. Efficient stimulated Raman scattering (SRS), investigated with the one-micron fundamental and second harmonic wave of a picosecond Nd 3+ :Y 3 Al 5 O 12 laser, reveals the potential of this new cubic non-linear susceptible ( χ (3) ) optical material for realizing effective solid state Raman shifters. The data are analyzed and compared with spectroscopic data from spontaneous Raman scattering. Pulsed tunable laser action of chromium-doped LiNbGeO 5 crystals was demonstrated in the spectral range between 1.3 and 1.52 μ m at cryogenic temperature and around 1.4 μ m at room temperature. Due to its excellent crystalline and optical properties, LiNbGeO 5 is a promising material for tunable near-infrared lasers with integrated frequency converters.

A new crystalline host for lasing Ln3+ ions: disordered calcium–lutetium fluoride

Abstract A new crystalline host for laser Ln 3+ ions is developed based on the CaLu 2 F 8 crystal. Laser oscillation at 1.05 μm is demonstrated for the Nd 3+ doped crystal, corresponding to the 4 F 3/2 → 4 I 11/2 laser channel. Spectroscopic laser gain experiments have been used to estimate the emission cross section as well as the internal loss factor associated to crystal lattice. The broad bands together with the relative high loss factor are explained in terms of the partial disorder existing in crystal structure.