光纤布拉格光栅
材料科学
光学
飞秒
栅栏
磷
长周期光纤光栅
激光器
光纤激光器
扭转(腹足类)
光纤传感器
光电子学
光纤
保偏光纤
波长
物理
医学
外科
作者
Xicheng Wang,Zhifang Wu,Yefen Wei,Wenqing Yang,Yué Huang,Zhiyuan Wang,Perry Ping Shum,Xiaoyan Wang,Jixiong Pu
出处
期刊:Optics Letters
[The Optical Society]
日期:2022-03-08
卷期号:47 (6): 1407-1407
被引量:4
摘要
The phase-shifted fiber Bragg grating (FBG) plays an important role in optical communication and sensing due to its ultra-narrow 3-dB bandwidth. Here, we demonstrate the fabrication and thermal property of a high-quality (Q)-factor phase-shifted helical fiber Bragg grating (PS-HFBG). A single-mode fiber is twisted and then inscribed point-by-point with a third-order uniform FBG by a single round of laser irradiation. The grating is curved slightly into a helical shape after the torsion is released, generating a phase shift in the grating. With annealing treatment, the PS-HFBG responds very stably to temperature with a linear sensitivity of 15.24 pm/°C within the range from 100 to 1100°C. Moreover, the PS-HFBG peak tends to narrower for higher temperature and the minimum 3-dB bandwidth is as low as 32 pm, indicating the highest Q-factor of 4.91 × 104. In addition, the PS-HFBG shows a low strain sensitivity (0.896 pm/με). The proposed device is very promising to be applied as a high-precision and stable high-temperature sensor.
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