Abstract
We report the temperature-independent measurement of displacement based on the chirp tuning of a fiber grating and a specially designed cantilever. The 3-dB bandwidth of the chirped grating changes linearly with displacement and is independent of the temperature. The displacement can be monitored directly by measuring the reflected light from the chirp grating. A linear displacement response of 37.063 mV/mm was obtained. The fluctuation of the output signal is less than 5% for a temperature range from 20 to 60°C without any temperature compensation technique. The sensor has potentially Iow cost due to its simple structure.
| Original language | English |
|---|---|
| Article number | 074401 |
| Pages (from-to) | 1-4 |
| Number of pages | 4 |
| Journal | Optical Engineering |
| Volume | 44 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Jul 2005 |
| Externally published | Yes |
Keywords
- Chirped fiber gratings
- Displacement
- Fiber optic sensors
- Temperature-independent
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- General Engineering
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