High‐speed quasi‐distributed strain sensing based on time division multiplexing of fibre Bragg gratings

Regenerated Fibre Bragg Gratings

5 Fibre Bragg Gratings

Optical Add-Drop Multiplexer Based on Fiber Bragg Gratings for Dense Wavelength Division Multiplexing Networks

A configurable optical add-drop multiplexer (OADM) based on fibre Bragg gratings is reported. Dynamically selection of the add-drop or pass-through functionality is realised according to the control of an optical switch. The OADM performance measurement realised in a 70 km, 3 × 2.5 Gb/s channels dense wavelength division multiplexing (DWDM) experimental network are reported and the results comp...

Etched Polymer Fibre Bragg Gratings and Their Biomedical Sensing Applications

Bragg gratings in etched polymer fibres and their unique properties and characteristics are discussed in this paper. Due to the change in material and mechanical properties of the polymer fibre through etching, Bragg gratings inscribed in such fibres show high reflectivity and enhanced intrinsic sensitivity towards strain, temperature, and pressure. The short-term and long-term stability of the...

Simultaneous 2D Strain Sensing Using Polymer Planar Bragg Gratings

We demonstrate the application of polymer planar Bragg gratings for multi-axial strain sensing and particularly highlight simultaneous 2D strain measurement. A polymer planar Bragg grating (PPBG) fabricated with a single writing step in bulk polymethylmethacrylate is used for measuring both tensile and compressive strain at various angles. It is shown that the sensitivity of the PPBG strongly d...