Refractometric Properties of a TFBG Sensor Demodulated Using α-Shape Modified Delaunay Triangulation

In our previous research, a novel demodulation technique based on α-shape Delaunay triangulation (D-T) was developed to obtain the refractive index of medium surrounding optical fibre using envelope cladding peaks from spectrum tilted Bragg grating (TFBG) sensor. This demonstrated be efficient, easy implement, powerful, faster than ones and applicable for real-time measurements. this paper, deep parametric analysis resolution, repeatability accuracy D-T TFBG refractometer sensor is performed presented. The spectral properties as are explored same technique. Specifically, supposing use two-parameter sensor, influence strain area analysed, measurement stability regarding external RI reported. Then, resonance in observed experimentally undergoes partial immersion defined liquid. last experiment allowed better understanding evolution transmission when gratings were partially surrounded by with different RI.