Ablation of holes with diameters as small as 82 nm and very clean walls was obtained in poly(methyl methacrylate) focusing pulses from a Ne-like Ar 46.9 nm compact capillary-discharge laser with a freestanding Fresnel zone plate diffracting into third order. These results demonstrate the feasibility of using focused soft x-ray laser beams for the direct nanoscale patterning of materials and the...

We report an efficient, visible, nanosecond optical parametric generator of periodically poled lithium niobate pumped at 532 nm by a frequency-doubled, diode-pumped, passively Q -switched, single-mode Nd:YAG laser with 90-muJ pulse energy. The signal radiation is tunable from 637 to 593 nm. The maximum signal-conversion efficiency is 23%. Optical parametric amplification of a He-Ne laser at 632...

Plasma parameters of magnetically confined Cobalt (Co) plasma have been evaluated by using laser-induced breakdown spectroscopy at various laser irradiances, under different ambient pressures two environments such as Ar and Ne time delays. The effect irradiance on Co is exposed in the presence absence a Transverse Magnetic field (TMF) while keeping environmental gas pressure constant, i.e., 10 ...

Design of the Alcator C-Mod Thomson Scattering (TS) diagnostic is discussed and the results of the measurements are presented. The TS system has 6 spatial channels with observation volumes evenly distributed between the midplane and the edge of the plasma. Each channel is capable of measuring the electron density in the range Ne = 5x 1019 m-3-5x 1021 m-3 and temperature from Te = 200 eV-10 keV....

Arsenic chalcogenide microlenses (As2S3) produced by an original procedure have been used for focusing the red – infrared laser light direct through an optical fiber. The microlenses with diameter in the range 150 – 400 m were glued on the optical single-mode fiber ends by Canada balm under optical microscope. The focusing effect of the microlenses was investigated in a stereomicroscope, and th...

In present, conventional system concepts for laser line-of-sight communications, mechanical coarseand ne-pointing units have to be implemented, resulting in a massive and bulky setup. Taking advantage of the phased array's inertia-free steering capability reduces the requirements on the ne-pointing mechanism and could even make it unnecessary. We are currently designing, breadboarding and testi...