Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 8: Laser development and applications II
Q 8.7: Talk
Monday, March 17, 2014, 15:30–15:45, DO26 207
VUV generation in a metal vapor filled hollow core fiber — •Andreas Koglbauer1,2, Thomas Diehl1,2, Patrick Bachor1,2, Ruth Steinborn1,2, Matthias Stappel1,2, and Jochen Walz1,2 — 1Johannes Gutenberg-Universität Mainz, D-55099 Mainz — 2Helmholtz-Institut Mainz, Johann-Joachim-Becher-Weg 36, 55128 Mainz
We present the first generation of continuous coherent vacuum ultraviolet (VUV) light by means of four-wave mixing in a mercury vapor filled hollow core fiber (HCF). Three fundamental laser beams at 254 nm, 408 nm and 540 nm are coupled into a vapor filled HCF with a bore diameter of 50 µm, where the sum-frequency generation to 121 nm takes place.
The use of a fiber allows a much longer interaction region, in contrast to the tight focussing regime. There it is restricted to a length comparable with the confocal parameter (∼ 1 mm). Confining the light in a fiber sustains high intensities over a long range (several cm). This gives rise to a theoretical efficiency enhancement of the mixing process of 102−103.
The presented measurements constitute a first important step towards an efficient VUV laser source.