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Opt Lett. 2010 Mar 1;35(5):757-9. doi: 10.1364/OL.35.000757.

Single-shot detection and direct control of carrier phase drift of midinfrared pulses.

Author information

  • 1Max Planck Research Group for Structural Dynamics, University of Hamburg, Center for Free Electron Laser Science, c/o DESY, Notkestrasse, 85-22607 Hamburg, Germany. cristian.manzoni@mpsd.cfel.de

Abstract

We introduce a scheme for single-shot detection and correction of the carrier-envelope phase (CEP) drift of femtosecond pulses at mid-IR wavelengths. Difference frequency mixing between the mid-IR field and a near-IR gate pulse generates a near-IR frequency-shifted pulse, which is then spectrally interfered with a replica of the gate pulse. The spectral interference pattern contains shot-to-shot information of the CEP of the mid-IR field, and it can be used for simultaneous correction of its slow drifts. We apply this technique to detect and compensate long-term phase drifts at 17 microm wavelength, reducing fluctuations to only 110 mrad over hours of operation.

PMID:
20195343
[PubMed]
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