Laser & Optoelectronics Progress, Volume. 51, Issue 8, 80604(2014)
Research on Sensing Characteristic of a Micro-Region Etched Long-Period Fiber Grating Michelson Interferometer
Based on a single long period fiber grating (LPFG) with optical fiber pigtail coated with highreflective film, a LPFG Michelson interferometer with partly etched fiber cladding LPFG is designed. It improves the LPFG sensitivity. By applying interference principle, the change of interference peaks along with environment refractive index is obtained. The refractive index sensitivity of no etched LPFG Michelson interferometer is compared with that of the etched LPFG Michelson interferometer, results show that the change of the refractive index sensitivity is significantly improved. The peak wavelength of interferometer shifts from 0.9 nm to 3.4 nm when liquid refractive index is 1.333 and 1.352.
Get Citation
Copy Citation Text
He Rushuang, Zhang Bin, Tao Weidong, Yan Feibiao, Duan Tianchen, Dong Jianfeng. Research on Sensing Characteristic of a Micro-Region Etched Long-Period Fiber Grating Michelson Interferometer[J]. Laser & Optoelectronics Progress, 2014, 51(8): 80604
Category: Fiber Optics and Optical Communications
Received: Jan. 15, 2014
Accepted: --
Published Online: Jul. 30, 2014
The Author Email: He Rushuang (rshuanghe@sina.cn)