Power-referenced and self-calibrated PM-FBG vibroscope

  title={Power-referenced and self-calibrated PM-FBG vibroscope},
  author={Libin Shang and Tuan Guo and Fu Liu and Fa Du and Zhaochuan Zhang and Baiou Guan and H. Y. Tam and Jacques Albert},
  journal={2012 Asia Communications and Photonics Conference (ACP)},
A compact vibration sensing probe, in which a short section of polarization-maintained (PM) fiber stub containing a normal straight fiber Bragg grating (FBG) is spliced to another single-mode fiber without any lateral offset, is proposed and experimentally demonstrated. Two groups of well-defined resonances with ~ 7 nm wavelength separation have been achieved in reflection. Among them, the recoupled cladding modes at short wavelength side are extremely sensitive to fiber bending and provide the… CONTINUE READING