New Optical Fiber Micro-Bend Pressure Sensors Based on Fiber-Loop Ringdown

摘要: Abstract A new optical fiber micro-bend pressure sensor using loop ringdown is studied in this paper. It consists of a pulse microchip laser, two 2×1optical couplers, photodetector, and section fused-silica single-mode fiber, which makes the sensing element with structure. Pressure can be measured by measuring time due to monotone relation transmission loss single mode fiber. test setup constructured, then corresponding different pressure, simulated putting heavy masses on panel. The experimental results show that has good linear reciprocal time, well agreement theoretical results. This free from fluctuation light power, badly affects performances traditional sensors. Furthermore, it advantages simple structure, fast response, highly sensitivity, convenience for multi-parameter sensing, etc., have wide applications.