High-time-resolution pump-probe system with broadband detection for the study of time-domain vibrational dynamics

We present an ultrafast transient absorption spectroscopy system in the visible combining high-sensitivity broadband detection with extreme temporal resolution. The instrument is based on an ultrabroadband sub-10 fs optical parametric amplifier coupled to an optical multichannel analyzer with fast electronics, enabling single-shot detection at 1 kHz repetition rate. For a given pump-probe delay τ, we achieve a differential transmission (ΔT/T) sensitivity of the order of 10−4 over the λpr = 490–720 nm probe wavelength range by averaging over 1000 shots, allowing the acquisition of complete two-dimensional ΔT/T (λpr,τ) maps within a few minute measurement time. We present application examples highlighting the capability of this instrument to observe ultrafast dynamical processes, follow impulsively excited vibrational motions with frequency as high as 3000 cm−1 (11 fs period), and determine the probe wavelength dependence of amplitude and phase of the oscillations

Few-optical-cycle light pulses with passive carrier-envelope phase stabilization

Few-optical-cycle light pulses with passive carrier-envelope phase stabilizatio

Ultrabroadband pulse shaping with a push-pull deformable mirror

Ultrabroadband pulse shaping with a push-pull deformable mirro

Utrafast excitation energy transfer in small carbon nanotube aggregates

Utrafast excitation energy transfer in small carbon nanotube aggregate

The Evolution of Signal-to-noise Ratio in Superfluorescence-contaminated Optical Parametric Chirped-pulse Amplification

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Observation of anomalous acoustic phonon dispersion in SrTiO3 by broadband stimulated Brillouin scatterin

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Femtosecond laser microstructuring: an enabling tool for optofluidic lab-on-chip

Femtosecond stimulated Raman spectrometer in the 320-520nm range

Femtosecond stimulated Raman spectrometer in the 320-520nm rang

Background-free broadband CARS spectroscopy from a 1-MHz ytterbium laser

Background-free broadband CARS spectroscopy from a 1-MHz ytterbium lase