A procedure for the fabrication of a fiber optic sensor involving
CO2 laser
ablation at λ = 10.6 µm
is proposed. A basic system to achieve optical fiber bending and material
processing on a single mode optical fiber is described and it is demonstrated
that an optical fiber can be bent at a very precise angle by focusing a
CO2
beam locally near the glass cladding surface until it reaches melting temperature. A
method is also described for removing material at the apex of a bent fiber to obtain a
smooth and well flattened plane surface that is suitable for optical fiber sensing.
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