Browse > Article

FBG Sensor Demodulation Using a Double-Pass Mach-Zhender Interferometer  

Park, Hyoung-Jun (Divison of Electronics and Information Engineering, Chonbuk National University)
Song, Min-Ho (Divison of Electronics and Information Engineering, Chonbuk National University)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.27, no.4, 2007 , pp. 285-290 More about this Journal
Abstract
A wavelength-demodulation algorithm for FBG sensor is proposed by using a double-pass Mach-Zehnder interferometer. Zero-crossing points of double-passed interference signal are used to trigger the accurate $90^{\circ}C$ phase difference positions in the sensor signal, which is an essential condition in the subsequent arctangent and phase unwrapping signal processing. With the proposed method, we could efficiently measure various measurands, such as dynamic-, static-strain, and temperature, and ${\sim}8pm$ of wavelength resolution was obtained.
Keywords
Fiber Bragg Grating; Fiber-Optic Sensor; Mach-Zehnder Interferometer; Strain Sensor; Temperature Sensor;
Citations & Related Records
연도 인용수 순위
  • Reference
1 A. D. Kersey, T. A. Berkoff and W. W. Morey, 'Multiplexed fiber Bragg grating strain-sensor system with a fiber Fabry-Perot wavelength filter,' Opt. Lett., Vol. 18, No. 16, pp. 1370-1372, (1993)   DOI
2 A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam and E. J. Friebele, 'Fiber grating sensors,' J. Lightwave Technol. Vol 15, No. 8, pp. 1442-1462, (1997)   DOI   ScienceOn
3 송민호, 이상배, 최상삼, 이병호, 'Mach-Zehnder 간섭계를 이용한 광섬유 브래그 격자센서', 전자공학회논문지, Vol. 34D, No. 3, pp. 105-113, (1997)
4 Y. L. Lo, J. S. Sirkis and C. C. Chang, 'Passive signal processing of in-line fiber etalon sensors for high strain-rate loading,' J. Lightwave Technol., Vol. 15, pp. 1578-1585, (1997)   DOI   ScienceOn
5 H. Park and M. Song, 'A qurter-wave phase -stepping algorithm for fiber optic ESPI using zero-crossing triggers,' IEEE Photon. Technol. Lett., Vol. 18, No. 16 pp. 1732-1734, (2006)   DOI   ScienceOn
6 G. Meltz, WW. Morey and W. H. Glenn, 'Formation of Bragg gratings in optical fibers by a transverse holographic method,' Opt. Lett., Vol. 14, pp. 823-825, (1989)   DOI
7 Proceedings in SHM Workshop, Tech. Digest, 18th International Conference on Optical Fiber Sensors (OFS), Oct. 23-27, Cancun, Mexico, (2006)
8 M. Song, S. Yin and P. B. Ruffin, 'Fiber Bragg grating strain sensor demodulation with quadrature sampling of Mach-Zehnder interferometer,' Appl. Opt., Vol. 39, No. 7, pp. 1106-1111, (2000)   DOI
9 A. Dandridge, A. B. Tveten and T. G. Giallorenzi, 'Homodyne demodulation scheme for fiber optic sensors using phase generated carrier,' IEEE J. Quantum Electron., JQE-18, pp. 1647-1653, (1982)