A tilted fiber Bragg grating in a short piece of fiber is configured to reflect two resonances separated by 2 nm. The differential sensitivity of the resonances to bending is large (7μW/mm) and temperature-independent.

Additional Metadata
Conference Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, BGPP 2007
Citation
Ivanov, A. (Alexei), & Albert, J. (2007). Tilted fiber bragg gratings stubs for vibration and bend sensing. Presented at the Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, BGPP 2007.