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Appl Opt. 2009 Aug 10;48(23):4526-35.

Tolerances of time-delay-compensated monochromators for extreme-ultraviolet ultrashort pulses.

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  • 1CNR-INFM LUXOR, Laboratory for UV and X-Ray Optical Research and Department of Information Engineering, Padova, Italy.


Time-delay-compensated grating monochromators for the spectral selection of extreme-ultraviolet femtosecond pulses in a broad spectral region are designed by adopting both classical diffraction and the off-plane mount. The optical design requires six optical elements: four concave mirrors and two plane gratings. I compare here the two designs in terms of the tolerances in the alignment for time-delay compensation in the femtosecond time scale. The off-plane mount is demonstrated to be far superior to the classical diffraction mount.

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