飞秒直写长周期光纤光栅及其液体折射率特性研究

利用800 nm飞秒激光在未经载氢处理的HI1060光纤中制作了长周期光纤光栅(LPFG)。采用逐线刻写方式实现了谐振波长为1 548.4 nm的LPFG, 谐振强度为12 dB, 栅区长度小于4 mm。使用不同折射率的氯化钠溶液、蔗糖溶液和酒精溶液分别对LPFG的折射率特性进行了测试和研究。实验中随着三种溶液折射率增加, LPFG的谐振波长发生红移, 该LPFG在氯化钠溶液、蔗糖溶液和酒精溶液中的折射率灵敏度分别为175.34、175.31和331.89 nm/RIU。实验结果表明, 这种基于飞秒激光制作的LPFG对液体折射率变化有较高的灵敏度, 可用于液体折射率传感测试。

Abstract

The long period fiber grating (LPFG) was fabricated by using the 800 nm femtosecond laser with line-by-line method in the non-hydrogen-loaded HI1060 fiber. The resonance wavelength of the LPFG is 1 548.4 nm, the resonance intensity is 12 dB, and the length of the grating region is less than 4 mm. The refractive index properties of LPFG were tested and studied by using different refractive index of NaCl solution, sucrose solution and alcohol solution. In the experiment, the resonance wavelength shifts toward longer wavelength with increases of the refractive index of three kinds of solution. The refractive index sensitivity of three kinds of solution is up to 175.34 nm/RIU, 175.31 nm/RIU and 331.89 nm/RIU respectively. The experimental results show that the LPFG based on the femtosecond laser has excellent sensitivity with the refractive index change of liquid, and can be used for the sensitive measurement of the liquid refractive index.

参考文献

[1] 韩汐, 赵明富, 罗彬彬, 等. 长周期光纤光栅三层结构折射率梯度响应特性研究[J]. 半导体光电, 2013, 34(3): 401-404.

Han Xi, Zhao Mingfu, Luo Binbin, et al. Research on response characteristics of the refractive-index gradient based on a three-layer long period fiber gratings[J]. Semiconductor Optoelectronics, 2013, 34(3): 401-404.

[2] Vengsarkar A M, Lemaire P J, Judkins J B, et al. Long-period fiber gratings as band-rejection filters[J]. J. of Lightwave Technol., 1996, 14(1): 58-65.

[3] Rao Y J, Wang Y P, Ran Z L, et al. Novel fiber-optic sensors based on long-period fiber gratings written by high-frequency CO2, laser pulses[J]. J. of Lightwave Technol., 2003, 21(5): 1320-1327.

[4] Hwang I K, Yun S H, Kim B Y. Long-period fiber gratings based on periodic microbends[J]. Opt. Lett., 1999, 24(18): 1263-1265.

[5] Liu S. Characteristic of high temperature structural long period grating fabricated by femtosecond laser[J]. Proc. of SPIE, 2015, 9624: 2192814.

[6] 易凯, 于永芹, 郑家容, 等. 800 nm飞秒激光长周期光纤光栅的特性[J]. 强激光与粒子束, 2011, 23(12): 3203-3206.

Yi Kai, Yu Yongqin, Zheng Jiarong, et al. Characteristics of long period fiber grating of 800 nm femtosecond laser[J]. High Power Laser and Particle Beams, 2011, 23(12): 3203-3206.

[7] Wang P, Brambilla G, Farrell G, et al. Long period grating inscribed in multimode fiber interferometer and its application in refractive index sensing[J]. Proc. of SPIE, 2015, 9634: 2191126.

[8] 孔梅, 石邦任. 长周期光纤光栅对外界折射率的敏感性[J]. 半导体光电, 2003, 24(6): 10-12,70.

Kong Mei, Shi Bangren. Sensitivity of long-period fiber gratings to ambient refractive index[J]. Semiconductor Optoelectronics, 2003, 24(6): 10-12,70.

[9] Dong X R, Sun X Y, Li H T, et al. Femtosecond laser fabrication of long period fiber gratings by a transversal-scanning inscription method and the research of its orientational bending characteristics[J]. Opt. & Laser Technol., 2015, 71: 68-72.

[10] Li B, Jiang L, Wang S, et al. Femtosecond laser fabrication of long period fiber gratings and applications in refractive index sensing[J]. Opt. & Laser Technol., 2011, 43(8): 1420-1423.

[11] 苗飞, 张玲, 冯德军, 等. 应用800 nm飞秒激光制备长周期光纤光栅[J]. 光学精密工程, 2012, 20(4): 685-691.

Miao Fei, Zhang Ling, Feng Dejun, et al. Inscription of long period fiber grating using 800 nm femtosecond laser[J]. Opt. and Precision Engin., 2012, 20(4): 685-691.

[12] 李海涛, 孙小燕. 改进型飞秒写制长周期光纤光栅及其高温特性[J]. 光电子·激光, 2014(10): 1859-1864.

Li Haitao, Sun Xiaoyan. Improved femtosecond laser fabrication of long period fiber gratings and corresponding applications in high temperature measurement[J]. J. of Optoelectron.·Laser, 2014(10):1859-1864.

[13] Ahmed F, Joe H E, Min B K, et al. Characterization of refractive index change and fabrication of long period gratings in pure silica fiber by femtosecond laser radiation[J]. Opt. & Laser Technol., 2015, 74: 119-124.

[14] Liu S, Wu J. Investigation of impact of photonic crystal fiber structure modified by femtosecond laser micromachining on long period gratings sensing characteristics[J]. Opt. & Lasers in Engin., 2016, 77: 79-84.

李达, 何巍, 闫光, 祝连庆. 飞秒直写长周期光纤光栅及其液体折射率特性研究[J]. 半导体光电, 2017, 38(3): 325. LI Da, HE Wei, YAN Guang, ZHU Lianqing. LPFG Fabricated by Femtosecond Laser and its Characteristics of Refractive Index of Liquid[J]. Semiconductor Optoelectronics, 2017, 38(3): 325.

飞秒直写长周期光纤光栅及其液体折射率特性研究

关于本站 Cookie 的使用提示

全站搜索

飞秒直写长周期光纤光栅及其液体折射率特性研究

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索