Ultrafast spectroscopy research: femtosecond multi - pulse absorption spectroscopy
- Unit: Faculty of Physics
- Keywords: Ultrafast spectroscopy, femtosecond spectroscopy, Ti:sapphire amplifier, Libra-USP-HE, TOPAS-800
The equipment set consists of: 1) Regenerative Ti:sapphire amplifier of femtosecond pulses with 30W solid-state pump laser Libra-USP-HE and unique set of spectroscopy equipment and diagnostic. Central wavelength of the amplified pulses is 800 nm, maximum pulse repetition rate 1 kHz, pulse duration < 50 fs. Pulse energy at 1 kHz repetition rate is > 3.5 mJ. It has an option of switchover between 505 fs pulse and 11010 fs pulse amplification modes.
2) Light Conversion parametric generator TOPAS-800 (2 units). Both are pumped by the first harmonic of Ti:sapphire amplifier. Spectral range: 1150 - 2600 nm. One of them has an opportunity to use difference frequency method for expansion the spectral range: 100 nm - 20 mm.
Application. Properties analysis of chemical and biological materials, semiconductors with ultrafast absorption spectroscopy methods at room and liquid nitrogen temperature. It is necessary to have investigative materials and necessary tools for their handling (dosage, dilution, dissolution, and fixation).