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"Picosecond pulses from wavelength-swept
continuous-wave Fourier domain mode-locked
lasers" Christoph M. Eigenwillig, Wolfgang Wieser, Sebastian Todor, Benjamin R. Biedermann, Thomas Klein, Christian Jirauschek, Robert Huber
Nature Communications 4: 1848 doi:10.1038/ncomms2870 (2013)
Abstract: Ultrafast lasers have a crucial function in many fields of science; however, up to now, high-energy
pulses directly from compact, efficient and low-power semiconductor lasers are not
available. Therefore, we introduce a new approach based on temporal compression of the
continuous-wave, wavelength-swept output of Fourier domain mode-locked lasers, where
a narrowband optical filter is tuned synchronously to the round-trip time of light in a
kilometre-long laser cavity. So far, these rapidly swept lasers enabled orders-of-magnitude
speed increase in optical coherence tomography. Here we report on the generation of
~60–70 ps pulses at 390 kHz repetition rate. As energy is stored optically in the long-fibre
delay line and not as population inversion in the laser-gain medium, high-energy pulses can
now be generated directly from a low-power, compact semiconductor-based oscillator. Our
theory predicts subpicosecond pulses with this new technique in the future.
BMO authors (in alphabetic order): Benjamin Biedermann Christoph Eigenwillig Robert Huber Thomas Klein Wolfgang Wieser
Assoziierte Projekte: Fourier Domain Mode Locking (FDML): Spectral mode locking in optics and applications
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