High sensitivity strain sensor based on Polymer Fiber Bragg Grating

High sensitivity strain sensor using Polymer Fiber Bragg Grating(P-FBG) is presented. An enhancement in strain sensitivity with an increase in the length of polymer FBG is simulated and demonstrated. The strain sensitivity increased from 1.39 to 5.15 pm/μɛ with the change in grating length from 26mm to100mm.Further, the strain sensitivity is increased by placing a polarization rotator in one arm of strain sensor.