Advanced Laser Spectroscopy Method and its Application in Atmospheric Environment
A custom-designed gain-switched frequency comb laser was passively coupled of to a medium-finesse cavity in the region between 6346 and 6354 cm?1 for the development of a prototype cavity enhanced absorption setup. The setup was applied to static gas detection of hydrogen sulfide at the parts per thousand level in a laboratory environment. A Fourier transform spectrometer was used for signal detection. The experimental performance of the setup was characterized in this proof-of-principle investigation; advantages, drawbacks and future scope of the approach are discussed in this work. 【Chandran, S., Mahon, S., Ruth, A.A. et al. Appl. Phys. B (2018) 124: 63.】
Prof. Dr. Albert Ruth
Intermediate Diploma Physics, TU Darmstadt, Germany, 1986
Diplom Physics (MSc), University of Goettingen, Germany, 1989.
Dr. rer. nat. Physics (PhD), Max-Planck Institute for Biophysical Chemistry Goettingen, Germany, 1992.
Prof. Ruth is now the leader of laser spectroscopy group in University College Cork. He is also pioneer of Incoherent BroadBand Cavity Enhanced Absorption Spectroscopy method. He published 64 journal articles which had been more than 1400 times cited. His h-index now is 21 from Web of Science report. His current research is directed towards the following topics:
· Applications of cavity ring-down spectroscopy to relevant problems in atmospheric physics/chemistry.
· Radical kinetics and trace gas detection.
· Light detection and ranging (LIDAR) for aerosol detection.
· Development of compact instruments for future field experiments.
· Spectroscopy of large organic compounds in seeded supersonic jets.
· Investigation of weak forbidden transitions in large jet-cooled aromatics.
· Formation of noble metal colloids in suspension using laser ablation.
· Third order nonlinear properties of novel materials, including porphyrins and colloidal systems.