Fiber inline interferometric refractive index sensors fabricated by femtosecond laser and fusion splicing

Fiber inline interferometric refractive index sensors fabricated by femtosecond laser and fusion splicing

A fiber inline interferometric refractive index （RI） sensor consisting of a microchannel and a fiber taper is proposed in this letter. The microchannel is fabricated by combining femtosecond laser micromachining and arc fusion splicing. No subsequent chemical etching process is needed. Three sensors...

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Bibliographic Details
Published in:Chinese optics letters Vol. 11; no. 11; pp. 21 - 24
Main Author: 于鹰宁 姜澜 李本业 曹志涛 王素梅
Format: Journal Article
Language:English
Published: 10-11-2013
Subjects:
传感器
光纤制作
内嵌
化学蚀刻工艺
干涉
折射率
熔接
飞秒激光
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Summary:A fiber inline interferometric refractive index （RI） sensor consisting of a microchannel and a fiber taper is proposed in this letter. The microchannel is fabricated by combining femtosecond laser micromachining and arc fusion splicing. No subsequent chemical etching process is needed. Three sensors with microchannel widths of 4, 8, and 10 μm are prepared. The sensitivity in the RI range from 1.33 to 1.35 is up to -361.29 nm/RIU at the microchannel width of 8 μm. The sensitivity is -20 times greater than that of the paired taper-based MZI sensors and long period fiber grating pair MZI sensors.
Bibliography:Yingyu Yu, Lan Jiang, Benye Li, Zhitao Cao, and Sumei Wang（Nanomanufacturing Fundamental Research Joint Laboratory of National Science Foundation of China, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China）
A fiber inline interferometric refractive index （RI） sensor consisting of a microchannel and a fiber taper is proposed in this letter. The microchannel is fabricated by combining femtosecond laser micromachining and arc fusion splicing. No subsequent chemical etching process is needed. Three sensors with microchannel widths of 4, 8, and 10 μm are prepared. The sensitivity in the RI range from 1.33 to 1.35 is up to -361.29 nm/RIU at the microchannel width of 8 μm. The sensitivity is -20 times greater than that of the paired taper-based MZI sensors and long period fiber grating pair MZI sensors.
31-1890/O3
ISSN:1671-7694
DOI:10.3788/COL201311.110603