Investigation of the fiber Bragg grating inscribed in multimode fiber by femtosecond laser

被引：3
|
作者：
Jiang, Yajun [1 ,2 ]
Yang, Dexing [1 ,2 ]
Yuan, Yuan [1 ,2 ]
Xu, Jian [1 ,2 ]
Li, Dong [1 ,2 ]
Wang, Meirong [1 ,2 ]
Zhao, Jianlin [1 ,2 ]
机构：
[1] Northwestern Polytech Univ, Key Lab Space Appl Phys & Chem, Minist Educ, Xian 710072, Peoples R China
[2] Northwestern Polytech Univ, Shaanxi Key Lab Opt Informat Technol, Sch Sci, Xian 710072, Peoples R China
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2017年 / 59卷 / 01期
基金：
中国国家自然科学基金;
关键词：
fiber Bragg grating; multimode fiber; femtosecond laser; OPTICAL-FIBERS; TEMPERATURE; TRANSMISSION; SPECTRA; SENSORS; MODES; IR;
D O I：
10.1002/mop.30260
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Multimode fiber Bragg grating (MFBG) is inscribed in graded-index multimode fiber using infrared femtosecond laser and phase mask. Multiple dips are observed in the transmission spectrum of MFBG. There is not only self-coupling effect between the forward and backward principal modes, but also the mutual coupling effect between the neighbor modes. The induced refractive index modulation of 6.4 x 10 (-4) is achieved for a peak power density of 4.1 x 10(13) W/cm(2) without any fiber sensitization. Thermal experiment results show that the MFBG belongs to type I grating. The transmission spectrum of MFBG shifts linearly with the strain and pressure at sensitivities of 1.27 +/- 0.002 pm/epsilon and -3.3 +/- 0.06 pm/MPa, respectively. The MFBGs are expected to be used for multichannel filters, multiwavelength fiber lasers, and multiparameter sensing. (c) 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:214-219, 2017
引用
收藏
页码：214 / 219
页数：6
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