长周期光纤光栅的折射率敏感特性

梁辉; 曾庆科; 秦子雄; 欧启标; 谭祖印; 刘宗晟

长周期光纤光栅的折射率敏感特性

1.
广西师范大学电子工程学院,广西桂林541004;
2.
赣南教育学院,江西赣州341000

详细信息

通讯作者:
梁辉(1979-)，男，江西赣州人，硕士研究生，主要从事光纤通信器件与传感器的研究工作。

中图分类号: TN253
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出版历程
- 刊出日期: 2011-01-14

ASensitivity of long period fiber grating to refractive index

1.
College of Electronic Engineering,Guangxi Normal University,Guilin 541004,China;
2.
College of Gannan Education,Ganzhou 341000,China

摘要

摘要: 利用光波导的耦合模理论分析了长周期光纤光栅(LPFG)的折射率传感特性，给出了LPFG的谐振波长相对于环境折射率变化时的漂移量解析表达式。对LPFG的折射率传感特性进行了数值模拟。结果表明：在光栅周期不变的情况下，当包层折射率小于且接近外界环境折射率时，波长的漂移量增大，且对应的模次越高、包层半径越小、包层折射率越小，波长漂移量越大，即LPFG对应于外界折射率传感灵敏度得到显著提高；当外界环境折射率大于包层折射率时，光栅的谐振波长将近似不变。
- 长周期光纤光栅 /
- 谐振波长 /
- 折射率灵敏度
Abstract: The sensitivity of long-period grating in refractive index sensing was analyzed by using the coupled-mode theory, and the formula of resonance wavelength shifts of LPFGs which changes relative to the surrounding refractive index was derived. If the period of grating is not changed, when the cladding refractive index is less than and close to the surrounding refractive index, the results show that the resonant wavelength shifts increased. The resonant wavelength shifts are greater for higher order cladding modes and smaller fiber cladding radius and smaller cladding refractive index, namely, the sensitivity to the surrounding refractive index is obviously enhanced. When the surrounding refractive index is greater than the fiber cladding refractive index, the resonant wavelength of grating will remain unchanged.
- long-period fiber grating /
- resonant wavelength /
- sensitivity to refractive index

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参考文献(1)

［1］ERDOGAN T. Cladding-mode resonances in short and long period fiber grating filters［J］. Journal of the Optical Society of America A, 1997,14(8):1760-1773.［2］欧启标. 长周期光纤光栅的理论及其传感应用研究［D］.桂林:广西师范大学,2007:69-74.OU Qi-biao. The study of theoretical and application of sensor on long period fiber gratings［D］. Guilin: Guangxi Normal University,2007:69-74.(in Chinese)［3］丁金妃,付宏燕.包层腐蚀长周期光纤光栅对的光谱特性研究［J］.浙江大学学报(工学版), 2007,41(3):537-540.DING Jin-fei, FU Hong-yan. The study of spectral characteristics of corrosion cladding of the long period fiber grating［J］. Journal of Zhejiang University, 2007,41(3):537-540. (in Chinese with an English abstract)［4］SHU X W, BENNION L Z I. Sensitivity charac-teristics of long-period fiber grating［J］.Journal of the Lightwave Thechnology, 2002,20(2):255-266.［5］高霞.基于长周期光纤光栅的理论及应用研究［D］.济南:山东大学,2009:55-63.GAO Xia. Based on the theory of long period fiber grating and its application［D］.Jinan: Shandong University,2009:55-63. (in Chinese)［6］武刚.提高长周期光纤光栅折射率传感灵敏度方法的研究［D］.长春:吉林大学,2009:34-37.WU Gang. The study on improving the method of the sensitivity to refractive index of long-period fiber grating［D］. Changchun: Jilin University, 2009:34-37. (in Chinese)［7］丁金妃.光纤光栅折射率传感技术研究［D］.杭州:浙江大学,2006:48-58.DING Jin-fei. The research on the sensing technology of refractive index of fiber grating［D］.Hangzhou:Zhejiang University, 2006:48-58. (in Chinese)［8］ERDOGAN T. Fiber grating spectra［J］.Journal of Lightwave Technology, 1997,15(8):1277-1294.［9］徐俊娇,李杰,戎华北,等.少模光纤布拉格光栅折射率传感的分析与测量［J］.光学学报,2008,28(3):565-568.XU Junjiao, LI Jie, RONG Hua-bei, et al. Analysis and measurement on refractive index sensing of few mode fiber Bragg gratings［J］. Acta Optica Sinica,2008,28(3):565-568. (in Chinese with an English abstract)［10］MARCUSE D. Theory of dielectric optical wave-guides［M］.2nd edition. Boston: Academic Press,1991:31-43.

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长周期光纤光栅的折射率敏感特性

通讯作者:
梁辉(1979-)，男，江西赣州人，硕士研究生，主要从事光纤通信器件与传感器的研究工作。

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ASensitivity of long period fiber grating to refractive index

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长周期光纤光栅的折射率敏感特性

通讯作者: 梁辉(1979-)，男，江西赣州人，硕士研究生，主要从事光纤通信器件与传感器的研究工作。

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ASensitivity of long period fiber grating to refractive index

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通讯作者:
梁辉(1979-)，男，江西赣州人，硕士研究生，主要从事光纤通信器件与传感器的研究工作。