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Opt Lett. 2008 Jul 1;33(13):1395-7.

Multiple fiber Bragg grating interrogation based on a spectrum-limited Fourier domain mode-locking fiber laser.

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  • 1Department of Electronic Engineering and Center for Advanced Research in Photonics, Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.


A novel fiber Bragg grating (FBG) sensing system based on a spectrum-limited Fourier domain mode-locking (SL-FDML) fiber laser is proposed. Multiple FBGs cascaded in a long fiber are utilized as both the sensors in the system and the wavelength-selected components in the SL-FDML fiber laser. Both wavelength-division multiplexing and spatial-division multiplexing techniques are demonstrated for interrogation of multiple FBGs by mapping the wavelength measurement to the time measurement and by adjusting the driving frequency of the SL-FDML fiber laser. The proposed FBG sensing system, employing techniques of the wavelength- and spatial-domain interrogation of multiple FBGs, can be used in remote and quasi-distributed multipoint sensing.

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