Improvement of spatial resolution of Brillouin optical time domain reflectometer using spectral decomposition

• Autorzy: Zhang D. , Shi B. , Cui H.L. , Xu H.Z.
• Języki publikacji: EN

Abstrakty

EN

Brillouin optical time domain reflectometer (BOTDR) has been used for strain and temperature measurement and health monitoring in infrastructural systems. However, the spatial measurement resolution of BOTDR cannot yet meet the measuring needs of some specific local strains, such as the strain caused by a narrow crack or fissure in structures. In this paper, a spectral decomposition method is proposed and used for improving the spatial resolution. Based on the proportion of the strain length within the spatial resolution, taking the spectrum of the strain section from the measured spectrum, and fitting the decomposed Brillouin gain spectrum with the Lorentzian curve, the actual strain within a spatial resolution along optical fibers can be obtained. The experimental results demonstrate that this method is applicable to the modification of the measured strain whether its strained length is less or greater than the spatial resolution without considering the installation method of the optical fiber

Słowa kluczowe

EN

Brillouin optical time domain reflectometer; BOTDR; spatial resolution; Brillouin gain spectrum; spectral decomposition; Brillouin spectrum width

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2004
• Tom: Vol. 34, nr 2
• Strony: 291--301
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Zhang D.

• ACEI, Department of Earth Sciences, Nanjing University, 210093, China

autor

Shi B.

• ACEI, Department of Earth Sciences, Nanjing University, 210093, China

autor

Cui H.L.

• ACEI, Department of Earth Sciences, Nanjing University, 210093, China

autor

Xu H.Z.

• ACEI, Department of Earth Sciences, Nanjing University, 210093, China

Bibliografia

• [1] HORIGUCHI T., KURASHIMA T., TATEDA M., IEEE Photon. Technol. Lett. 1 (1989), 107.
• [2] KURASHIMA T., HORIGUCHI T., IZUMITA H., FURUKUWA S., KOYAMADA Y., IEICE Trans. Commun. E76-B (1993), 382.
• [3] KURASHIMA T., TATEDA M., HORIGUCHI T., KOYAMADA Y., IEEE Photon. Technol. Lett. 9 (1997), 360.
• [4] HOTATE K., TANAKA M., IEICE Trans. Electron. E84-C (2001), 1823.
• [5] BAO X., DEMERCHANT M., BROWN A., BREMNER T., J. Lightwave Technol. 19 (2001), 1698.
• [6] OHNO H., NARUSE H., KIHARA M., SHIMADA A., Optical Fiber Technology 7 (2001), 45.
• [7] YASUE N., NARUSE H., MASUDA J.I., KINO H., NAKAMURA T., YAMAURA T., IEICE Trans. Electron. E83-C (2000), 468.
• [8] OHNO H., NARUSE H., KURASHIMA T., NOBIKI A., UCHIYAMA Y., KUSAKABE Y., IEICE Trans. Electron. E85-C (2002) 945.
• [9] ZENG X., BAO X., CHHOA C., BREMNER T., BROWN A., DEMERCHANT M., FERRIER G., KALAMKAROVA., GEORGIADES A., Appl. Opt. 41 (2002), 5105.
• [10] BROWN A., DEMERCHANT M., BAO X., BREMNER T., J. Lightwave Technol. 17 (1999), 1179.
• [11] OHSAKI M., TATEDA M., OMATSU T., OHNO H., IEICE Trans. Commun. E85-B (2002), 1636.
• [12] NITTA N., TATEDA M., OMATSU T., Opt. Rev. 9 (2002) 49.
• [13] UCHIYAMA H., SAKAIRI Y., NOZAKI T., ANDO Technical Bulletin 10 (2002), 52.