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Phys Rev Lett. 2012 Dec 28;109(26):263902. Epub 2012 Dec 26.

Extreme ultraviolet interferometer using high-order harmonic generation from successive sources.

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  • 1ARC Centre of Excellence for Coherent X-Ray Science, Griffith University, Brisbane, Queensland 4111, Australia.


We present a new interferometer technique whereby multiple extreme ultraviolet light pulses are generated at different positions within a single laser focus (i.e., from successive sources) with a highly controllable time delay. The interferometer technique is tested with two generating media to create two extreme ultraviolet light pulses with a time delay between them. The delay is found to be a consequence of the Gouy phase shift. Ultimately the apparatus is capable of accessing unprecedented time scales by allowing stable and repeatable delays as small as 100 zs.

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