| Title |
Polarimetric Fiber Pressure Sensor Incorporating Polarization-Diversity-Loop-Based Sagnac Interferometer |
| Authors |
Uh-Chan Ryu ; Sung Wook Choi ; Yong Wook Lee |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2015.29.7.001 |
| Keywords |
Polarization-Maintaining Fiber ; Pressure Sensor ; Sagnac Interferometer ; Birefringence |
| Abstract |
In this paper, we demonstrated a polarimetric fiber pressure sensor using a polarization- diversity-loop-based Sagnac interferometerPDLSI) composed of polarization-maintaining fiberPMF) and a fiber Bragg gratingFBG). In order to compare the pressure sensitivity for various kinds of PMF, three kinds of bow-tie PMF were employed as sensor heads. The maximum pressure sensitivity was measured as approximately -15.07㎚/MPa, and an R2 value to represent sensor linearity was measured as ∼0.992 at the sensor system using corresponding PMF over a pressure range of 0-0.3MPa. An FBG was utilized and located adjacent to the PMF segment for compensating temperature-induced errors in the measurement of pressure. The pressure sensitivity of the proposed sensor was improved by approximately four times compared with the previously reported pressure sensor based on polarization-maintaining photonic crystal fiber. |