Gas-assisted pressurizing has been proven to provide a uniform pressure distribution over a large-area substrate. This paper reports an innovative embossing technique, which makes use of the unique combination of plasticizing and isotropic pressurizing poly(methyl methacrylate) substrates possible with CO 2 gas. CO 2 serves as a plasticizer and as a pressurizer of a substrate during gas-assisted embossing. As a result, CO 2 -assisted embossing can be performed under lower temperatures and with lower pressure, and enhances the replication quality by reducing the residual stress in the substrates. In this paper, the process parameters and the quality of the CO 2 -assisted embossed substrates with V-grooves are shown and discussed. Results show that the processing temperature, embossing pressure and residual stress in substrates are significantly lower with CO 2 -assisted embossing.
The development and the investigation of generation of a powerful pulse solid-state slab laser based on potassiumgadolinium tungstate crystals with neodimium ions in unconventional resonator design realizing the mechanism of autocompensation for optical field distributions caused by an effects induced in powerful lasers active medium by pumping emission are reported. The operation efficiency of this mechanism on the pulse solid-state lasers with slab elements of rectangular cross-section is shown.A high lasing efficiency and high beam quality of the Studied laser output radiation are demonstrated.
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