Medium For Random Laser And Manufacturing Process of the Same
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United States of America Patent
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app pub date -
Jan 20, 2015
filing date -
May 25, 2012
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Abstract
A process for fabricating a device capable of random lasing comprising a substrate and a rare earth-doped glass fabricated on the substrate in the form of a waveguide, wherein the glass comprises a germanium glass, a titanium glass or a chalcogenide glass, where the process comprises ablating a target glass with incident radiation from an ultrafast laser in the presence of the substrate to deposit a quantity of the target glass on the substrate and applying rastering to ablate the target glass uniformly. The ultrafast laser emits pulses of 15 ps or less and the relative position of the laser spot on the target glass with respect to the substrate is constant during the ablation and wherein the Gaussian intensity profile of the laser beam has a spot area less than 3000 μm2.
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