The cladding of single-mode optical fibers supports hundreds of propagating modes providing for different sensing modalities. Simultaneous use of many grating-induced resonances in a given measurement leads to a corresponding improvement in detection limits.
Latin America Optics and Photonics Conference, LAOP 2018
Department of Electronics

Albert, J, & Gang, T. (Tingting). (2018). Multi-resonant optical fiber gratings for hundred-fold improvements in sensing limits of detection. In Optics InfoBase Conference Papers. doi:10.1364/LAOP.2018.Tu5B.1