A novel: surrounding refractive index sensor based on the polarization characteristics of thin-cladding long-period fiber grating

作者：Bai Yukun^*; Zhang Yue; Ma Xiurong

来源：Optics Communications, 2015, 355: 607-611.

DOI：10.1016/j.optcom.2015.07.004

• Polarization
• Thin-cladding
• LPFG
• SRI
• Sensor

In this paper, a new method to measure the surrounding refractive index (SRI) is proposed. It is based on the core-only photoinduced birefringence of long-period fiber grating (LPFG). The relationship between Stokes parameters of output light polarization states and SRI is analyzed using full-vector coupled mode equations. Compared to the conventional LPFG SRI sensors, this sensing method features a fairly good linearity performance and reasonably high resolution over a much broader SRI measurement range from 1 to 1.46 which may be applied to the humidity and vapor sensing.

• 出版日期2015-11-15
• 单位天津理工大学; 天津大学