Periodical rocking long period gratings in PANDA fibers for high temperature and refractive index sensing |
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| Authors: | JIN W BI Wei-hong FU Xing-hu and FU Guang-wei |
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| Affiliation: | Key Laboratory for Special Fiber and Fiber Sensor of Heibei Province, School of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China;.017;6. Optoelectron. Lett. Vol.13 No.3;OPTOELECTRONICS LETTERS Vol.13 No.5, 1 September 2017,Key Laboratory for Special Fiber and Fiber Sensor of Heibei Province, School of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China;.017;6. Optoelectron. Lett. Vol.13 No.3;OPTOELECTRONICS LETTERS Vol.13 No.5, 1 September 2017,Key Laboratory for Special Fiber and Fiber Sensor of Heibei Province, School of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China;.017;6. Optoelectron. Lett. Vol.13 No.3;OPTOELECTRONICS LETTERS Vol.13 No.5, 1 September 2017 and Key Laboratory for Special Fiber and Fiber Sensor of Heibei Province, School of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China;.017;6. Optoelectron. Lett. Vol.13 No.3;OPTOELECTRONICS LETTERS Vol.13 No.5, 1 September 2017 |
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| Abstract: | We report periodical rocking long period gratings (PR-LPGs) in PANDA fibers fabricated with CO2 laser. The PR-LPGs achieve very high coupling efficiency of 19 dB with 12 periods and a 3.5° twist angle in just one scanning cycle, which is much more effective than the conventional CO2 laser fabrication technique. This type of LPGs exhibits polarization-selective resonance dips which demonstrate different sensitivities to environmental parameters. The high temperature and external refractive index sensitivities are measured simultaneously, so it can be used as a wavelength-selective polarization filter and sensor. This work has been supported by the National Natural Science Foundation of China (No.61605168), the Natural Science Foundation of Hebei Province (No.F2016203392), the College and University Natural Science Foundation of Hebei Province (No.QN2016078), the Science and Technology Project of Qinhuangdao City (No.201601B050), and the Intramural Doctoral Foundation of Yanshan Universtiy (No.B1011). E-mail:jinwa@ysu.edu.cn |
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