含涂覆层长周期光纤光栅温度特性研究

J4 ›› 2012, Vol. 29 ›› Issue (2): 247-251.

含涂覆层长周期光纤光栅温度特性研究

陆君辉,施解龙

上海大学理学院物理系，上海 200444

收稿日期:2011-03-08 修回日期:2011-04-19 出版日期:2012-03-28 发布日期:2012-02-28
通讯作者: 施解龙博士，副教授，研究方向为光纤光栅，光通信器件等。 E-mail:sjlong@staff.shu.edu.cn
作者简介:陆君辉研究生，从事光纤光栅方面的研究。 E-mail: lujunhui001@163.com
基金资助:
国家自然科学基金（60808002）, 上海市重点学科建设项目资助(S30105)

Temperature characteristics of coated long period fiber gratings

LU Jun-hui, SHI Jie-long

Department of Physics, Shanghai University, Shanghai 200444, China

Received:2011-03-08 Revised:2011-04-19 Published:2012-03-28 Online:2012-02-28

摘要/Abstract

摘要：

提出在含涂覆层的标准通信光纤中用800nm红外飞秒激光直接写入了长周期光纤光栅（LPFGs）。从理论上分析了光纤涂覆层对于纤芯基模和包层模有效折射率的影响，并进一步研究涂覆层对LPFGs温度灵敏度的影响。分别对制作的去除涂覆层和含涂覆层LPFGs的低阶包层模进行了温度特性实验。结果表明：涂覆层的存在不仅能成为LPFGs理想的保护层，更重要的是将LPFGs的温度灵敏度提高到0.1173 ，与理论分析吻合。这种含涂覆层光纤光栅若作为温度传感器，将有着良好的机械强度和温度灵敏度。

关键词: 纤维和导波光学, 含涂覆层长周期光纤光栅, 飞秒激光脉冲, 温度特性

Abstract:

A method is proposed to directly inscribe long period fiber gratings(LPFGs) in coated standard communication optical fibers by an 800nm infrared femtosecond laser. Influence of fiber coatings on the effective indices for fundamental core mode and cladding mode was analyzed theoretically, and further research was carried out to study the influence on the LPFG’s temperature sensitivity. Temperature performance of the low-order cladding mode of uncoated and coated LPFGs was tested, respectively. The results show that the presence of coating is not only the desirable protective layer for LPFGs, and most importantly, the LPFG’s temperature sensitivity is increased to 0.1173 , in accordance with the theory analysis. The coated LPFGs, if as temperature sensors, will have a good mechanical strength and temperature sensitivity.

Key words: fiber and waveguide optics, coated long period fiber gratings, femtosecond laser pulses, temperature characteristics

中图分类号:

TN253

陆君辉施解龙. 含涂覆层长周期光纤光栅温度特性研究[J]. J4, 2012, 29(2): 247-251.

LU Jun-hui, SHI Jie-long. Temperature characteristics of coated long period fiber gratings[J]. J4, 2012, 29(2): 247-251.

参考文献

[1] He W X, Shi W K, Ye A L, et al. Long period fiber grating: theory, fabrication and application[J]. Optical Technique (光学技术), 2001, 27(5): 396-400. (in Chinese)
[2] Zhao L J, Yu Z H, Yu Y, et al. Temperature and pressure dual-parameter measurement and analysis with single fiber Bragg grating[J]. Chinese Journal of Quantum Electronics(量子电子学报), 2010, 27(4): 503-507.(in Chinese)
[3] Chen S H, Liao Q D, et al. A novel temperature sensor based on the cascaded long-period fiber gratings[J]. Chinese Journal of Quantum Electronics (量子电子学报), 2005, 22(6) :955-959. (in Chinese)
[4] He W X, Shi W K, Ye A L, et al. Long Period Fiber Grating Based Temperature Sensing Scheme with High Sensitivity[J]. Chinese Journal of Sensors and Actuators (传感技术学报), 2002, 1: 60-63. (in Chinese)
[5] Zhang Z J, Shi W K, Gao K, et al. Thermo-optic coefficient and temperature sensitivity of long-period fiber gratings[J]. Optical Technique (光学技术), 2004, 30(5): 525-528. (in Chinese)
[6] Yu Y Q, Ruan S C, Yang H L, et al. Temperature sensor using a long period fiber grating fabricated by 800 nm femtosecond laser pulses[C]. Proceedings of the SPIE-The International Society for Optical Engineering, 2010, 7655: 76550Q.
[7] Liu Y Q, Guo Z Y, Zhang A L, et al. Researeh on Refraetive Index Sensitivity of Long-Period Fiber Grating[J]. Chinese Journal of Quantum Electronics (量子电子学报), 1999, 16(6): 507-510. (in Chinese)
[8] Masson F, Decker C, Andre S, et al. UV-curable formulations for UV-transparent optical fiber coatings I. Acrylic resins[J]. Prog. Org. Coat., 2004, 49(1):1-12.
[9] Kondo Y, Nouchi K, Mitsuyu T, et al. Fabrication of long-period fiber gratings by focused irradiation of infrared femtosecond laser pulses[J]. Opt. Lett., 1999, 24(10): 646-648.
[10] Nikogosyan D N. Multi-photon high-excitation-energy approach to fibre grating inscription[J]. Meas. Sci. Technol., 2007, 18: R1-R29.
[11] Chiang K S, Liu Y Q, Meinar N, et al. Analysis of etched long-period fibre grating and its response to external refractive index[J]. Electron. Lett., 2000, 36(11): 966-967.
[12] Martinez A, Khrushchev I, Bennion I. Direct inscription of Bragg gratings in coated fibers by an infrared femtosecond laser[J]. Opt. Lett., 2006, 31(11): 1603-1605.