Work

Versatile femtosecond laser synchronization for multiple-timescale transient infrared spectroscopy 2.0

Year: 2025

Type: article

Abstract: A versatile and easy-to-implement concept is presented, which allows one to time-synchronize in essence any amplified Ti:Sa laser system to a high-repetition rate Yb-laser system. The oscillator round trip frequency of one of the oscillators needs to be tunable by a few kHz only. That is, the repetition rates of the two laser oscillators do not have to be identical, rather synchronization is achieved only when the low-repetition rate Ti:Sa laser system produces a pump pulse. Piezoactuators for cavity length adjustment in the required range are a built-in option for modern high repetition rate laser systems, in which case no modification of the Ti:Sa laser system is required. Utilizing this synchronization, single-UV/VIS-pump-multiple IR-probe experiments become possible, covering a very wide range of timescales from 1 ps to 1 s with one-and-the-same instrument and with a time resolution of about 1 ps. Two example experiments are presented to demonstrate the capability of the setup.

Source: Review of Scientific Instruments

DOI: 10.1063/5.0302850

Authors: Philipp Janke, Kerstin Oppelt, Jan Helbing, Peter Hamm

Institution: University of Zurich

Language: English

Topic: Laser-Matter Interactions and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

Awards: Transient IR Spectrsocopy from Picoseconds to Seconds, Linking time-resolved structures and signal transduction within multi-domain photosensors