Refractive index Mach-Zehnder interferometer sensor based on tapered no-core fiber

被引：8
|
作者：
Zhao, Yeming [1 ]
Tong, Zhengrong [1 ]
Zhang, Weihua [1 ]
Zhang, Jietong [1 ]
Li, Jiaxin [1 ]
Wang, Xue [1 ]
机构：
[1] Tianjin Univ Technol, Tianjin Key Lab Film Elect & Commun Devices, Engn Res Ctr Optoelect Devices & Commun Technol, Minist Educ,Sch Elect & Elect Engn, Tianjin 300384, Peoples R China
来源：
LASER PHYSICS | 2021年 / 31卷 / 04期
关键词：
Mach– Zehnder interferometer (MZI); No-core fiber (NCF); tapered; multi-mode interference (MMI); refractive index; Temperature;
D O I：
10.1088/1555-6611/abe241
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A Mach-Zehnder interferometer sensor based on tapered no-core fiber (NCF) is proposed in this paper. Due to the multimode interference of the single-mode fiber (SMF)-NCF-SMF structure and the higher-order modes excited by the tapered structure, the sensor is more sensitive to the refractive index. The refractive index sensitivities are 130.5 nm RIU-1 from 1.340 to 1.380, 330.0 nm RIU-1 from 1.380 to 1.420, and 906.0 nm RIU-1 from 1.420 to 1.440, respectively. The temperature sensitivity is 0.0595 nm degrees C-1 from 30 degrees C to 90 degrees C. This proposed sensor has a simple structure and low cost, which can be widely used for biological sensing.
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页数：6
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