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Opt Lett. 2007 Feb 1;32(3):280-2.

Eliminating the longitudinal piston error between tiled gratings by angle tuning.

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Research Center of Laser Fusion, Chinese Academy of Engineering Physics, Mianyang, Sichuan 621900, China.


In a tiled-grating system, it is difficult to make two tiled gratings strictly coplanar. We propose and demonstrate for the first time, as far as we know, a simple method by which the longitudinal piston error between two tiled gratings can be reduced below lambda/10, close to the influence of the environmental factors. The alignment precision of the method increases with the tiled-grating system's stability to environmental factors.

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