High Order Resonances in Turning Point Long Period Fiber Grating Fabricated by a Femtosecond Laser

被引：0

作者：

Shen, Fangcheng ^{[1
]}

Jiang, Haiming ^{[1
]}

Xia, Hongyan ^{[1
]}

Xie, Kang ^{[1
]}

Shu, Xuewen ^{[2
,3
]}

机构：

[1] Guangdong Univ Technol, Sch Electromech Engn, State Key Lab Precis Elect Mfg Technol & Equipmen, Guangzhou, Peoples R China

[2] Huazhong Univ Sci & Technol, Natl Lab Optoelect, Wuhan, Peoples R China

[3] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan, Peoples R China

来源：

2021 OPTOELECTRONICS GLOBAL CONFERENCE (OGC 2021) | 2021年

关键词：

optical fiber sensors; fiber gratings; refractive index; femtosecond laser direct writing; SENSITIVITY; DISPERSION;

D O I：

10.1109/0GC52961.2021.9654368

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：

Long period fiber grating (LPFG) around the dispersion turning point (DTP) is fabricated with femtosecond laser direct writing. The fabricated grating exhibits dual resonances in its transmission spectrum, which are typical in DTP-LPFG. Resonant peaks generated from high order (3rd) diffraction can be observed when the grating is immersed in aqueous glycerol solution. The resonant wavelengths of experimentally observed peaks agree well with those theoretically predicted by phase matching condition, revealing the correspondence of the peaks with certain cladding modes. The responses of the fabricated grating to surrounding refractive index is also investigated, confirming the high sensitivity of DTP-LPFG. The additional high order resonances can serve as a reference for dual- or multi parameter sensing applications.

引用

页码：145 / 148

页数：4

共 16 条

[1]

Adams M. J., 1981, INTRO OPTICAL WAVEGU, P223

[2] Optical fiber long-period grating sensors [J].