9Tam H Y, Liu S Y, Guan B O, et al. Fiber Bragg grating sensors for structural and railway &pplications [M].In proceedings Photonics Asia 2004: Advanced sensor systems and applications 11 5654:85- 97.
10Tam H Y, Lee T, Ho S L, et a optics Bragg grating sensing systems Utilization of fiber for health monitoring n railway applications [M]. Hong Kong: Photonics Research Center, The Hong Kong Polytechnic University, 2007.