A Temperature-Insensitive Refractive Index Sensor Based on No-Core Fiber Embedded Long Period Grating

作者：Geng, Tao; Zhang, Shuo; Peng, Feng; Yang, Wenlei^*; Sun, Cuiting; Chen, Xudong; Zhou, Yu; Hu, Qihao; Yuan, Libo

来源：Journal of Lightwave Technology, 2017, 35(24): 5391-5396.

DOI：10.1109/JLT.2017.2772304

• Long-period grating
• mode coupling
• refractive index sensor
• temperature dependence

A novel long-period fiber grating via periodically embedding no-core fiber (NCF) has been achieved. The 11-period SMF-NCF-SMF-long period fiber grating (SNS-LPG) can exhibit an extremely high loss resonant dip (>20 dB). Theoretical analysis shows good agreement with the measured transmission spectrum. We investigated both refractive index and temperature sensitivity of SNS-LPG. The fabricated sensor achieve an average wavelength sensitivity of 141.837 nm/RIU in the range of 1.333-1.400 RIU, and exhibit lower temperature sensitivity (-6.43 pm/degrees C and 0.005 dB/degrees C).

• 出版日期2017-12-15
• 单位桂林电子科技大学; 哈尔滨工程大学