High-Q-factor phase-shifted helical fiber Bragg grating by one-step femtosecond laser inscription for high-temperature sensing

Wang, Xicheng1; Wu, Zhifang1; Wei, Yefen1; Yang, Wenqing1; Huang, Yanyan1; Wang, Zhiyuan1; Shum, Perry Ping2; Wang, Xiaoyan1; Pu, Jixiong1,3

2022-03-15

10.1364/OL.452178

OPTICS LETTERS   影响因子和分区

0146-9592

1539-4794

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 degrees 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 x 10(4). In addition, the PS-HFBG shows a low strain sensitivity (0.896 pm/mu epsilon). The proposed device is very promising to be applied as a high-precision and stable high-temperature sensor. (C) 2022 Optica Publishing Group

SCI ; EI

英语

其他

National Natural Science Foundation of China[11774102] ; Promotion Program forYoung and Middle-aged Teacher in Science Technology Research of HuaqiaoUniversity[ZQN-YX504]

Optics

Optics

WOS:000769389400029

OPTICAL SOC AMER

20221111774391

Bandwidth ; Femtosecond lasers ; Optical fiber fabrication ; Q factor measurement ; Single mode fibers ; Temperature sensors

Information Theory and Signal Processing:716.1 ; Fiber Optics:741.1.2 ; Lasers, General:744.1 ; Electric Variables Measurements:942.2 ; Temperature Measuring Instruments:944.5

PHYSICS

Web of Science

1.Huaqiao Univ, Coll Informat Sci & Engn, Fujian Key Lab Light Propagat & Transformat, Xiamen 361021, Peoples R China
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
3.Dongguan Guangda Intelligent Technol Co Ltd, Dongguang 523808, Guangdong, Peoples R China

Wang, Xicheng,Wu, Zhifang,Wei, Yefen,et al. High-Q-factor phase-shifted helical fiber Bragg grating by one-step femtosecond laser inscription for high-temperature sensing[J]. OPTICS LETTERS,2022,47(6):1407-1410.

Wang, Xicheng.,Wu, Zhifang.,Wei, Yefen.,Yang, Wenqing.,Huang, Yanyan.,...&Pu, Jixiong.(2022).High-Q-factor phase-shifted helical fiber Bragg grating by one-step femtosecond laser inscription for high-temperature sensing.OPTICS LETTERS,47(6),1407-1410.

Wang, Xicheng,et al."High-Q-factor phase-shifted helical fiber Bragg grating by one-step femtosecond laser inscription for high-temperature sensing".OPTICS LETTERS 47.6(2022):1407-1410.