Temperature and strain sensing characteristics of the tilted fiber Bragg grating

• 作 者: 张卫华 杨保和 童峥嵘 苗银萍 刘波 董孝义
• 机 构: School of Electronics Information and Communications Engineering, Tianjin University of Technology,K
• 出 处: Optoelectronics Letters
• 发表日期: 2010年05期
• 关键词: Bragg grating cladding discriminate refractive fitting stuck discrimination embe

Theoretical and experimental studies on the tilted fiber Bragg grating (TFBG) temperature and strain sensing characteristics are conducted. The TFBG is stuck to the surface of the beam along the axis direction. When the free end of the beam is forced, both the strain and temperature will induce wavelength shifts. The temperature characteristic of TFBG cladding modes is similar to that of the core mode while the strain characteristics of TFBG core mode and cladding modes are different. A novel method to discriminate the temperature and strain simultaneously is put forward based on TFBG sensing characteristics.

Theoretical and experimental studies on the tilted fiber Bragg grating (TFBG) temperature and strain sensing characteristics are conducted. The TFBG is stuck to the surface of the beam along the axis direction. When the free end of the beam is forced, both the strain and temperature will induce wavelength shifts. The temperature characteristic of TFBG cladding modes is similar to that of the core mode while the strain characteristics of TFBG core mode and cladding modes are different. A novel method to discriminate the temperature and strain simultaneously is put forward based on TFBG sensing characteristics.