Chunran Sun, Jianhang Sun, Yuguang Dong, Ziheng Cheng, Heng Li
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Research on Spectral Characteristics of Phase-Shifted Fiber Bragg Grating and Its Defence Applications
Phase-shifted fiber Bragg grating (PSFBG), as an important basic optical component, has been widely used in the fabrication of optical devices due to its narrow linewidth and good filtering characteristics. Fiber lasers and fiber sensors which composed of them have important application prospects in defence fields. According to transfer matrix method, the transmission characteristics of PSFBG is analyzed theoretically. Through the simulation of different phase shift, fiber grating length and refractive index modulation depth, the main effect factors of transmission window position, linewidth and reflectivity are obtained. Finally, the applications of PSFBG in synthetic aperture ladar, fiber hydrophone and three-dimensional microscale sensing are introduced and analyzed.
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