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Rapid-scan acousto-optical delay line with 34 kHz scan rate and 15 as precision

Schubert, Olaf ; Eisele, M. ; Crozatier, V. ; Forget, N. ; Kaplan, D. ; Huber, Rupert



Abstract

An optical fast scan delay exploiting the near-collinear interaction between a train of ultrashort optical pulses and an acoustic wave propagating in a birefringent crystal is introduced. In combination with a femtosecond Er:fiber laser, the scheme is shown to delay few femtosecond pulses by up to 6 ps with a precision of 15 as. A resolution of 5 fs is obtained for a single sweep at a repetition rate of 34 kHz. This value can be improved to 39 as for multiple scans at a total rate of 0.3 kHz.


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