Fabrication of intrinsic fibre Fabry-Perot cavities in silica optical fibres via F2-laser ablation
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Colleges, School and Institutes
This paper reports on a technique for fabricating intrinsic fibre Fabry-Perot cavities in fused silica optical fibres. An F-2-excimer laser was used to micromachine parallel walled cavities through the diameter of optical fibres. A custom-designed beam delivery and target alignment system was used to enable the production of high aspect-ratio cavities in fibres. The optical response of the micro-cavities ablated in SMF 28 and SM 800 fibres at suitable energy densities showed Fabry-Perot fringes produced as a result of interference of Fresnel reflections at the cavity wall surfaces. The intrinsic fibre Fabry-Perot cavities were characterized using optical and scanning electron microscopy. Preliminary tests have shown that these intrinsic cavities can be used as strain sensors.
|Number of pages||7|
|Journal||Measurement Science and Technology|
|Early online date||13 Feb 2007|
|Publication status||Published - 1 Mar 2007|