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High-power optical vortex lasers have been opening up new applications, such as material processing [1], plasma physics, and nonlinear optics. A side-pumped Nd-doped vanadate bounce laser, in which a limiting aperture for the desired vortex mode in the gain medium is formed by utilizing mode-dependent thermal-lens effects of the laser material, is a promising solution to generate a high-power optical...
Metal microneedles have been attractive in many fields including nano-scopic imagers, energy-saving field emission displays, and biomedical nano-electro mechanical systems. Several methods for fabrication of metal microneedles have been proposed. However, they involve mostly a bottom-up technique based on several chemical processes, and their time and cost efficiencies are limited. In recent years,...
We demonstrated 105 W pico-second output from a cascaded Nd:YVO4 amplifier laser system consisting of a Nd:YVO4 bounce amplifier with a photorefractive phase-conjugate mirror and a second diode-side-pumped Nd:YVO4 bounce power amplifier.
A high-power pico-second vortex output from a mixed-vanadate master laser and a Yb-doped fiber amplifier system was demonstrated. An output power of 25.3 W was achieved, corresponding to a peak power of 37.4 kW.
We produced directly an ultra-high-power 1.06 μm vortex mode from a diode-pumped Nd:GdVO4 bounce amplifier. A maximum vortex output of 17.8 W was achieved at a pump power of 55 W.
We investigated thermal-lensing effects in a side-pumped 1.3μm Nd:YVO 4 slab laser amplifier having a bounce geometry. The thermal-lens power during 1.3μm laser action was 1.3-times larger than that without laser action. Excited-state absorption is the main cause for increased heat loading during laser operation. The heat-loading formula in end-pumped 1.3μm vanadate lasers having low Nd doping...
We have achieved high average power Raman output from a compact, diode-pumped, self-stimulating Nd 3+ :KGd(WO 4 ) 2 Raman laser. Maximum Raman output power of 0.8W was achieved at a pulse repetition frequency (PRF) of 2kHz. The optical efficiency from diode to Raman laser was 14%. By generating extra-cavity second harmonics using a LiB 3 O 5 crystal, it was...
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