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Fabrication of Efficient, Large Aperture Transmission Diffraction Gratings by Ion-Beam Etching

机译:离子束刻蚀制备高效大孔径透射衍射光栅

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We have designed and produced a high-efficiency transmission gratings fabricated in bulk fused silica for in high-power laser systems. These gratings were designed to diffractively compress 1050 nm - 1070 nm light. We have obtained diffracted efficiencies greater than 95% for m = -1 order in a near-Littrow configuration for a 2 diameter substrate. In addition, we have produce a 65 cm diameter bulk fused silica transmission grating that exhibits diffracted efficiency in places greater than 82% for m= -1 order. While we have made significant advances towards developing the ability to produce master gratings at this size, there are still several outstanding technology issues to be addressed.

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