Dynamic and static strain fiber Bragg grating sensor interrogation with a 1.3 mu m Fourier domain mode-locked wavelength-swept laser

作者：Lee Byoung Chang^*; Jung Eun Joo; Kim Chang Seok; Jeon Min Yong

来源：Measurement Science and Technology, 2010, 21(9): 094008.

DOI：10.1088/0957-0233/21/9/094008

• wavelength-swept laser
• FBG sensor array
• FBG sensor interrogation

We demonstrate dynamic and static strain fiber Bragg grating (FBG) sensor array interrogation using a 1.3 mu m Fourier-domain mode-locked (FDML) wavelength-swept laser. The FDML wavelength-swept laser provides a high speed scanning rate and wide scanning bandwidth. Using the FDML wavelength swept laser, we measure the performances of static strain sensor interrogation for both time and spectral domains. The slope coefficients for the measured relative wavelength difference and relative time delay from the static strain are 0.8 pm/mu strain and 0.086 ns/mu strain, respectively. We demonstrate the dynamic response of the FBG sensor array with a 100 Hz modulating strain based on the FDML wavelength-swept laser at a 40.6 kHz scanning rate. The FBG sensor interrogation system using the FDML wavelength-swept laser can be realized for high-speed and high-sensitivity monitoring systems.

• 出版日期2010-9