Journal article
High Sensitivity Polymer Optical Fiber-Bragg-Grating-Based Accelerometer
We report on the fabrication and characterization of the first accelerometer based on a polymer optical fiber Bragg grating (FBG) for operation at both 850 and 1550 nm. The devices have a flat frequency response over a 1-kHz bandwidth and a resonance frequency of about 3 kHz. The response is linear up to at least 15 g and sensitivities as high as 19 pm/g (shift in resonance wavelength per unit acceleration) have been demonstrated.
Given that 15 g corresponds to a strain of less than 0.02% and that polymer fibers have an elastic limit of more than 1%, the polymer FBG accelerometer can measure very strong accelerations. We compare with corresponding silica FBG accelerometers and demonstrate that using polymer FBGs improves the sensitivity by more than a factor of four and increases the figure of merit, defined as the sensitivity times the resonance frequency squared.
| Language: | English |
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| Publisher: | IEEE |
| Year: | 2012 |
| Pages: | 763-765 |
| ISSN: | 19410174 and 10411135 |
| Types: | Journal article |
| DOI: | 10.1109/LPT.2012.2188024 |
| ORCIDs: | Stefani, Alessio and Bang, Ole |
Accelerometers Bragg gratings Fiber gratings Optical fibers Polymers Sensitivity Silicon compounds accelerometers fiber Bragg grating fibre optic sensors figure of merit flat frequency response optical fiber sensor optical fibre fabrication polymer fibers polymer fibres polymer optical fiber polymer optical fiber-Bragg-grating-based accelerometer resonance frequency wavelength 1550 nm wavelength 850 nm
