The Tunable, Narrow-Bandwidth Excimer Laser, the New Workhorse for Photochemistry in the UV and VUV. Issue 1 (1983) - Hohla, K.
Abstract : Excimer lasers are powerful sources of radiation in the UV, providing several laser lines between 157 and 353 nm. The excimer laser transition is bound-free, and thus the emitted wavelengths are broad-band (up to 200 cm −1 ). In addition the high gain (0.15 cm −1 ) of the laser gas causes a rather large divergence (>1 mrad) in conventional excimer lasers. A new excimer laser concept is described which improves the spectral brightness in terms of watt/(rad × bandwidth) by three orders of magnitude. This allows, through non-linear processes such as Raman shifting the fundamental output and four-wave-mixing in gases, the generation of new laser lines in the UV and VUV.