The effect of unwanted interferometric signals on the wavelength detection accuracy in a fiber Bragg grating sensor using a tunable laser and a first derivative interrogation technique are investigated. The wavelength detection error can be reduced significantly by proper modulating the laser wavelength.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering