Optical bend sensor based on measurement of resonance mode splitting of long-period fiber grating
- 1 May 2000
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 12 (5) , 531-533
- https://doi.org/10.1109/68.841276
Abstract
We report an effective new method of realizing optical bend sensing based on the measurement of bending-curvature encoded resonance mode splitting of long-period fiber grating. The bending induced mode splitting exhibits a near-linear response and the bending sensitivity achieved by this method is nearly four times higher than the previously reported wavelength shift detection method. The evolution of the transmission loss under bending appears dependent on the initial mode coupling strength.Keywords
This publication has 7 references indexed in Scilit:
- Dual resonant peaks of LP 015 claddingmode in long-period gratingsElectronics Letters, 1999
- Fibre optic load sensors with high transverse strainsensitivity basedon long-period gratings in B/Ge co-doped fibreElectronics Letters, 1999
- Cladding mode degeneracy in bent W-fibres beyond cutoffOptics Communications, 1998
- Long period fibre gratings for structural bend sensingElectronics Letters, 1998
- Optical fiber long-period grating sensorsOptics Letters, 1996
- Long-period fiber gratings as band-rejection filtersJournal of Lightwave Technology, 1996
- Coupled-mode theory for guided-wave opticsIEEE Journal of Quantum Electronics, 1973