A V Butashin

Orthorhombic ferroelectric and ferroelastic Gd2(MoO4)3 crystal — a new many-purposed nonlinear and optical material: efficient multiple stimulated Raman scattering and CW and tunable second harmonic generation

Abstract The nonlinear optical properties of a ferroelectric and ferroelastic β′-Gd2(MoO4)3 laser crystal-host were studied by second harmonic generation (SHG) and stimulated Raman scattering (SRS) experiments using different laser sources for excitation. It is shown that the investigated crystals are very attractive for SHG with IR CW lasers as well as for continuously tunable SHG under illumination with a femtosecond hyper-continuum light source. Furthermore, up to five Stokes and five anti-Stokes lines have been obtained in picosecond SRS experiments with a total conversion efficiency of about 70%. Interaction of SHG and SRS, as well as a new effect, which may be called quasi-hyper SRS, have been observed with insulating crystal for the first time. We classify the β′-Gd2(MoO4)3:Nd as a promising laser medium for pulsed and CW self-frequency doubling lasers.

High‐order stimulated Raman scattering combined with second harmonic generation in [χ(2)+χ(3)]‐nonlinear LaBGeO5, β′‐Gd2(MoO4)3 and Ca4Gd(BO3)3O laser host crystals under picosecond excitation

New frequency conversion processes leading to emission in the visible spectral range were observed for the first time by multiple Stokes and anti-Stokes Raman generation arising from intrinsic second harmonic generation in three different [χ(2)+χ(3)]-nonlinear LaBGeO5, β′-Gd2(MoO4)3 and Ca4Gd(BO3)3O laser host crystals under picosecond pumping at a fundamental wavelength of 1 μm.

New Nd{sup 3+}:CaLu{sub 2}F{sub 8} laser crystal containing lutetium

A new Nd3+:CaLu2F8 fluoride laser crystal with a disordered structure was produced. A preliminary investigation was made of its absorption and luminescence characteristics, and cw lasing (4F3/2 → 4I11/2 channel) of the Nd3+ activator ions was achieved.

Quasi-cw Pr{sup 3+} : LiYF{sub 4} laser with {lambda}= 0.6395 {mu}m and an average output power of 2.3 W

A quasi-cw flashlamp-pumped Pr3+ : LiYF4 laser was developed. It emits in the red part of the spectrum (λlas=0.6395 μm) and it is repetitively pulsed. Its average output power is 2.3 W at a repetition rate of f=10 Hz and 650 mW at f=50 Hz.