Qi Yanhui, Ma Lin, Kang Zexin, Bai Yunlong, Yin Bin, Jian Shuisheng
Appl Opt. 2014 Oct 1;53(28):6382-8. doi: 10.1364/AO.53.006382.
In this paper, we present a simple, compact, and highly sensitive optical fiber curvature sensor. It consists of dual no-core fibers for coupling energy from the lead-in single-mode fiber (SMF), and recoupling the energy into the lead-out SMF. The sensing section is constituted by multicladding fiber with a length of 5 cm. In the experiment, the spectrum shows a blueshift, and the energy corresponding to the resonant wavelength shows a cosine series with a bending of the sensing segment. The curvature sensitivity around the wavelength of 1550 nm shows -39.02 nm/m(-1) within the curvature range from 0.3 to 2.14 m(-1). The temperature sensitivity is 78.2 pm/°C in the temperature range of 10 °C-60 °C. It implies the possibility of temperature measurement.
在本文中，我们提出了一种简单、紧凑且高灵敏度的光纤曲率传感器。它由双无芯光纤组成，用于耦合来自引入单模光纤（SMF）的能量，并将能量重新耦合到引出的单模光纤中。传感部分由长度为5厘米的多包层光纤构成。在实验中，光谱出现蓝移，与谐振波长对应的能量随传感段弯曲呈现余弦级数变化。在曲率范围为0.3至2.14 m⁻¹内，1550 nm波长附近的曲率灵敏度为-39.02 nm/m⁻¹。在10℃至60℃的温度范围内，温度灵敏度为78.2 pm/℃。这意味着该传感器具有进行温度测量的可能性。
