Differential multiplexing of fiber bragg gratings by means of optical time domain refractometry
- 47 Downloads
A differential method of detection and multiplexing of signals from fiber Bragg gratings based on optical time domain reflectometry is developed. The method is based on probing of a system of gratings by means of short laser pulses and measurement of the power of the resulting reflected pulses by means of standard fiber-optic reflectometry. The proposed method may find extensive use in the area of monitoring of deformation and temperature distributions by means of fiber-optic sensors based on Bragg gratings.
Key wordsfiber Bragg grating (FBG) optical time domain reflectometry (OTDR) optical reflectormeter
- 2.J. S. Leng et al., “Fibre optic sensors for structural health monitoring of concrete structures,” Proc. SPIE, 5634, doi: 10.1117/12.573673 (2005).
- 3.H. Baier, U. C. Mueller, and S. Rapp, “Fiber optic sensor networks in smart structures,” Proc. SPIE, 6933 (693309), doi: 10.1117/12/778294 (2008).
- 4.Jinping Ou, “Some recent advances of intelligent health monitoring systems for civil infrastructures in HIT,” Proc. SPIE, 5851, 147 (2004).Google Scholar