A polarization-maintaining fibre Bragg grating interrogation system for multi-axis strain sensing

作者：Ye CC; Staines SE; James SW; Tatam RP^*

来源：Measurement Science and Technology, 2002, 13(9): 1446-1449.

DOI：10.1088/0957-0233/13/9/310

• polarization-maintaining fibre
• fibre Bragg grating
• interrogation system
• multi-axis strain sensor
• transverse strain

We report the development of a fibre Bragg grating (FBG) interrogation system that is capable of detecting independently and simultaneously the two orthogonally polarized signals reflected from a polarization-maintaining (PM) FBG. This relaxes the constraints on the bandwidth of the FBG spectrum, allowing the use of a shorter PM FBG (larger bandwidth) for sensing applications where a higher spatial resolution is required. It imposes no limitation on the measurable strain range and strain profile. The interrogation system is capable of decoding the complex spectral responses of a PM FBG subjected to a transverse load.

• 出版日期2002-9