Interrogation of a spectrally overlapped sensing network through phase and amplitude encoding of super-structured FBG sensors

[EN] Phase and amplitude encoded FBG sensors are proposed. We present their experimental identification under overlapping conditions using a dual-wavelength interrogation setup to retrieve the frequency response of the sensing networkThis work was supported by the Spanish MCINN projects TEC2016-80385-P, TEC2013-42332-P and TEC 2009-12169; and by the Colombian Science, Technology and Innovation department (Colciencias) through PhD call 567Triana Infante, CA.; Pastor Abellán, D.; Varón, M. (2017). Interrogation of a spectrally overlapped sensing network through phase and amplitude encoding of super-structured FBG sensors. Optical Society of America (OSA). 1-3. https://doi.org/10.1364/SENSORS.2017.SeW3E.213Grattan, K. T. V., & Sun, T. (2000). Fiber optic sensor technology: an overview. Sensors and Actuators A: Physical, 82(1-3), 40-61. doi:10.1016/s0924-4247(99)00368-4Kersey, A. D., Davis, M. A., Patrick, H. J., LeBlanc, M., Koo, K. P., Askins, C. G., … Friebele, E. J. (1997). Fiber grating sensors. Journal of Lightwave Technology, 15(8), 1442-1463. doi:10.1109/50.618377Erdogan, T. (1997). Fiber grating spectra. Journal of Lightwave Technology, 15(8), 1277-1294. doi:10.1109/50.618322Culshaw, B., & Kersey, A. (2008). Fiber-Optic Sensing: A Historical Perspective. Journal of Lightwave Technology, 26(9), 1064-1078. doi:10.1109/jlt.0082.921915Hu, C., Wen, H., & Bai, W. (2014). A Novel Interrogation System for Large Scale Sensing Network With Identical Ultra-Weak Fiber Bragg Gratings. Journal of Lightwave Technology, 32(7), 1406-1411. doi:10.1109/jlt.2014.2305714Kirkendall, C. K., & Dandridge, A. (2004). Overview of high performance fibre-optic sensing. Journal of Physics D: Applied Physics, 37(18), R197-R216. doi:10.1088/0022-3727/37/18/r01Banos, R., Garcia-Munoz, V., Pastor, D., & Amaya, W. (2013). Rectangular Global Envelope Super Structured FBGs for Multiband Coherent OCDMA. IEEE Photonics Technology Letters, 25(5), 512-514. doi:10.1109/lpt.2013.2242880Triana, A., Pastor, D., & Varon, M. (2016). Overlap-Proof Fiber Bragg Grating Sensing System Using Spectral Encoding. IEEE Photonics Technology Letters, 28(7), 744-747. doi:10.1109/lpt.2015.250874