Trench-embedding fiber taper sensor fabricated by a femtosecond laser for gas refractive index sensing

被引：13

作者：

Cao, Zhitao ^{[1
]}

Jiang, Lan ^{[1
]}

Wang, Sumei ^{[1
]}

Wang, Peng ^{[1
]}

Zhang, Fei ^{[1
]}

Lu, Yongfeng ^{[2
]}

机构：

[1] Beijing Inst Technol, Sch Mech Engn, Natl Sci Fdn China, NanoManufacturing Fundamental Res Joint Lab, Beijing 100081, Peoples R China

[2] Univ Nebraska, Dept Elect Engn, Lincoln, NE 68588 USA

来源：

APPLIED OPTICS | 2014年 / 53卷 / 06期

基金：

中国国家自然科学基金;

关键词：

OPTICAL-FIBER; TEMPERATURE; INTERFEROMETER;

D O I：

10.1364/AO.53.001028

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A fiber in-line, multimode coupling interferometer with a trench-embedding, fiber taper probe is proposed and fabricated by femtosecond-laser-induced water breakdown. The reflection-type taper probe is used for gas refractive index (RI) detection from 1.0001143 to 1.0002187 and temperature sensing from 50 degrees C to 500 degrees C. The largest RI sensitivity of the taper probe embedded with a trench at a width of 18.4 mu m is 669.502 nm/RIU for hybrid nitrogen and helium. Temperature sensitivity is 9.97 pm/degrees C and it shows good linearity through the whole testing range. The new-type multimode interferometer is appropriate for high-accuracy gas RI detection of micrometer-scale spaces and wide-range temperature compensation can be realized. (C) 2014 Optical Society of America

引用

页码：1028 / 1032

页数：5

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