Acid-etched Fabry-Perot micro-cavities in optical fibres

V. R. Machavaram; R. A. Badcock; G. F. Fernando

doi:10.1117/12.779661

1 November 2007 Acid-etched Fabry-Perot micro-cavities in optical fibres

V. R. Machavaram, R. A. Badcock, G. F. Fernando

Proceedings Volume 6423, International Conference on Smart Materials and Nanotechnology in Engineering; 64231R (2007) https://doi.org/10.1117/12.779661
Event: International Conference on Smart Materials and Nanotechnology in Engineering, 2007, Harbin, China

Abstract

Significant progress has been made in recent years on the design and fabrication of optical fibre-based sensor systems for applications in structural health monitoring. Two sensor designs have tended to dominate namely, fibre Bragg gratings and extrinsic fibre Fabry-Perot sensors. However, the cost and time associated with these sensors is relatively high and as a consequence, the current paper describes a simple procedure to fabricate intrinsic fibre Fabry-Perot interferometric strain sensors. The technique involves the use of hydrofluoric acid to etch a cavity in a cleaved optical fibre. Two such etched cavities were fusion spliced to create an intrinsic fibre Fabry-Perot cavity. The feasibility of using this device for strain monitoring was demonstrated. Excellent correlation was obtained between the optical and surface-mounted electrical resistance strain gauge.

Citation Download Citation

V. R. Machavaram, R. A. Badcock, and G. F. Fernando "Acid-etched Fabry-Perot micro-cavities in optical fibres", Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64231R (1 November 2007); https://doi.org/10.1117/12.779661

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