Single-shot detection and direct control of carrier phase drift of midinfrared pulses.
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.
Manzoni
Cristian
C
Max 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
Först
Michael
M
Ehrke
Henri
H
Cavalleri
Andrea
A