We experimentally demonstrate an all-fiber loading sensor system based on a 45° and an 81° tilted fiber grating (TFG). We have fabricated two TFGs adjacent to each other in a single fiber to form a hybrid structure. When the transverse load applied to the 81° TFG, the light coupling to the two orthogonally polarized modes will interchange the power according to the load applied to the fiber, which provides a solution to measure the load. For real applications, we further investigated the interrogation of this all-fiber loading sensor system using a low-cost and compact-size single wavelength source and a power meter. The experimental results have clearly shown that a low-cost high-sensitivity loading sensor system can be developed based on the proposed TFG configuration.
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- fiber optical sensors
- fiber optical gratings
- stress measurement
Sun, Z., Yan, Z., Mou, C., Wang, X., Li, J., & Zhang, L. (2016). All-fiber loading sensor based on a hybrid 45° and 81° tilted fiber grating structure. IEEE Sensors Journal, 16(2), 343-348. https://doi.org/10.1109/JSEN.2015.2484071