论文信息 - Intensity-independent fiber coupled interrogation technique for fiber Bragg gratings by fiber Bragg gratings

Intensity-independent fiber coupled interrogation technique for fiber Bragg gratings by fiber Bragg gratings

A low cost, highly accurate and light intensity-independent sensor system for the analysis of fiber Bragg grating signals based on fiber Bragg gratings in the detection unit is presented. The setup is based on two fiber Bragg gratings used in reflection to analyse one sensing fiber Bragg grating. The Bragg gratings were inscribed in coated non-photosensitive standard telecommunication fibers using an infrared femtosecond laser and the point-by-point writing technique. The accuracy of this interrogation concept is presented by means of a temperature measurement with a resolution better than 0.12°C in a linear operation range of 20°C.

Wolfgang Schade | Jörg Burgmeier | Jan Koch

[1] Antonello Cutolo,et al. Dynamic strain measurements by fibre Bragg grating sensor , 2004 .

[2] Ian Bennion,et al. All-fibre optical sensing system: Bragg grating sensor interrogated by a long-period grating , 1998 .

[3] I. Bennion,et al. Direct writing of fibre Bragg gratings by femtosecond laser , 2004 .

[4] K. Hirao,et al. Fabrication of long-period fiber gratings by focused irradiation of infrared femtosecond laser pulses. , 1999, Optics letters.

[5] D. Grobnic,et al. Bragg gratings written in all-SiO/sub 2/ and Ge-doped core fibers with 800-nm femtosecond radiation and a phase mask , 2004, Journal of Lightwave Technology.

[6] P. Kryukov,et al. Inscription of fiber Bragg gratings by ultraviolet femtosecond radiation. , 2003, Optics letters.

[7] Ian Bennion,et al. Thermal properties of fibre Bragg gratings inscribed point-by-point by infrared femtosecond laser , 2005 .

[8] Ian Bennion,et al. Identical broadband chirped grating interrogation technique for temperature and strain sensing , 1997 .