Polarization-Dependent Strain and Twist Sensors Based on Tilted Fiber Bragg Grating

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  • Tilted fiber Bragg grating (TFBG) shows various advantages in sensing parameters such as, strain, temperature and twist angle. In particular, multiple data collected from cladding modes of TFBG provide a multi-functional modality. According to this feature, a temperature-independent strain sensor and a high sensitivity twist sensor based on TFBG are introduced in this thesis. The relative wavelength shifts of P and S polarized spectra are utilized in analyzing strain sensors based on their strong temperature-independent characteristics. Linear experimental results which relate to the wavelength separation from the Bragg mode resonance are presented. Meanwhile, sensitive amplitude variations with respect to the strain applied to TFBG are also evident. Moreover, TFBG shows high sensitivity to twist angle due to its unique structure. The sensitivity of Polarization-dependent loss (PDL) presents an obvious contrast to that of insertion loss; the comparisons are described experimentally.

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  • Copyright © 2014 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
Date Created
  • 2014


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