Abstract
As a light wave-guide component for transmitting ultraviolet (UV) laserpulses, pure silica core UV fibre probes have attracted a great deal of attentionin the near-field optical data storage and bio-medical studies. Wefabricate UV fibre probes with tips in dimension of about 2–5 μm andtaper angle 16° by the tube etching method, using 40% HF acid asetching solution and xylene as overlayer. Probes produced have curvyconfiguration with smooth surface. The yield of fine probes is ratherhigh and etching operation greatly simplified. With higher damagethreshold, pure silica core multimode UV fibre probes can be coupledinto more laser power. In addition, using UV light reduces the cutoffwavelength of the fibre probes, which is in favour of increasing thetransmission efficiency of the probe. Furthermore, the larger tipdimension helps to enhance the light throughput either. The advancesof fabrication technique of UV optical fibre probe may further supportthe studies of UV light data storage, pulsed laser biosurgery and UVphotolithography.
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