Type

Journal Article

Authors

Yuliya Semenova
Qiang wu
Gerald Farrell
Fangfang Wei

Subjects

Engineering

Topics
refractive index temperature sensor microfiber coupler mfc ri sensor microfiber sensor fiber loop interferometer power transmission electrical and computer engineering

Utilising a Loop Structure to Allow a Microfiber Coupler with Larger Taper Diameters to be Used for Sensing (2016)

Abstract This paper examines a technique that utilizes a Sagnac loop with a microfiber coupler (MFC) as a coupler which allows the MFC to operate effectively as a sensor but with larger than normal tapered fiber diameters. The proposed structure is found to be suitable for temperature and refractive index (RI) sensing. It is shown that a variation in the surrounding of the MFC RI results in a shift of the output spectrum, while a temperature variation leads to changes in the intensity of the interference dips. A decrease in the waist diameter of the MFC results in an increase in the sensitivity to temperature. For MFC structures based on a 5.6 µm and a 3 µm fiber waist diameter, the minimum transmission power level of a selected spectral dip decreases by 1.7 dB and 5.03 dB respectively, as the temperature changes from 18 ºC to 44 ºC. A change in the surrounding RI from 1.334 to 1.395 results in the spectral redshift of 8 nm using a 5.6 µm fiber waist diameter. By functionalizing the surface of the MFC with various materials, the structure could potentially be used for sensing of other parameters.
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Full list of authors on original publication

Yuliya Semenova, Qiang wu, Gerald Farrell, Fangfang Wei

Experts in our system

1
Yuliya Semenova
TU Dublin
Total Publications: 136
 
2
Qiang wu
TU Dublin
Total Publications: 90
 
3
Gerald Farrell
TU Dublin
Total Publications: 212
 
4
Fangfang Wei
TU Dublin
Total Publications: 8