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[Fizinfo] Szeminárium - Seminar, Tue 9 Feb 2021-Váczi Tamás

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  • From: Szeminárium koordinátor <szfi-seminar AT>
  • To: SZFI Szeminárium <seminar AT>,Fizinfo <fizinfo AT>
  • Cc: Fizinfo <fizinfo AT>
  • Subject: [Fizinfo] Szeminárium - Seminar, Tue 9 Feb 2021-Váczi Tamás
  • Date: Thu, 4 Feb 2021 10:52:37 +0100 (CET)
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SZFI Seminar
Váczi Tamás
(Wigner FK SZFI)
Development of a spectrally focussed femtosecond SRS system for microscopy
and spectroscopy
The basic principles and practical aspects of constructing a system for
spectrally focussed, femtosecond laser-based simulated Raman scattering (SRS)
applications are presented. The system is based on a turnkey dual-output
laser unit for rough tuning, glass inserts for pulse chirp, optomechanics for
controlling spatial and temporal overlap, and a galvanometric scanning
two-photon microscope with transmitted balanced simulated Raman gain
detection. Spectral focussing allows fast, high-precision, highly selective
SRS imaging and spectroscopy through delay tuning but requires the careful
matching of the chirp parameters of the two pulses. The optimisation of the
system including the total group delay distortion, balanced detection, the
acousto-optic modulator transfer function, polarization rotation correction
etc. are explained, all aiming at increasing the signal-to-noise ratio.
Demonstrating examples are shown including polymer SRS spectra, label-free
tissue imaging, concentration series of alkyne-tagged molecules, and a case
of resonant SRS enhancement.Tuesday, 9 February 2021, 10:00
video conference,
Language of the talk: English
All interested are welcome!
Róbert Juhászszfi-seminar AT

  • [Fizinfo] Szeminárium - Seminar, Tue 9 Feb 2021-Váczi Tamás, Szeminárium koordinátor, 02/04/2021

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