V R Machavaram et al 2007 Meas. Sci. Technol. 18 928 doi:10.1088/0957-0233/18/3/047
V R Machavaram, R A Badcock and G F Fernando
Show affiliationsThis paper reports on a technique for fabricating intrinsic fibre Fabry–Perot cavities in fused silica optical fibres. An F2-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.
42.62.Cf Industrial applications
07.10.Pz Instruments for strain, force, and torque
42.55.Lt Gas lasers including excimer and metal-vapor lasers
42.60.Da Resonators, cavities, amplifiers, arrays, and rings
07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
Issue 3 (March 2007)
Received 29 September 2006, in final form 8 January 2007
Published 13 February 2007
V R Machavaram et al 2007 Meas. Sci. Technol. 18 928
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