Compact three segmented multimode fiber modal interferometer for high sensitivity refractive-index measurement

2005 ◽  
Author(s):  
Y. Jung ◽  
Soan Kim ◽  
D. S. Lee ◽  
K. Oh
Keyword(s):  
Refractive Index ◽  
High Sensitivity ◽  
Multimode Fiber ◽  
Refractive Index Measurement ◽  
Index Measurement

Refractive index measurement based on fiber Bragg grating connected with a multimode fiber core

2015 ◽  
Vol 351 ◽  
pp. 70-74 ◽  
Author(s):  
Min Shao ◽  
Xueguang Qiao ◽  
Zhenan Jiasurname ◽  
Haiwei Fusurname ◽  
Yinggang Liu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Multimode Fiber ◽  
Refractive Index Measurement ◽  
Fiber Core ◽  
Index Measurement

In-fiber Mach-Zehnder Interferometer Based on Cascading Fiber Air Bubble for High Sensitivity Liquid Refractive Index Measurement

2016 ◽  
Vol 45 (7) ◽  
pp. 70706006
Author(s):  
李辉栋 LI Hui-dong ◽  
傅海威 FU Hai-wei ◽  
邵敏 SHAO Min ◽  
闫旭 YAN Xu ◽  
贾振安 JIA Zhen-an
Keyword(s):  
Refractive Index ◽  
High Sensitivity ◽  
Zehnder Interferometer ◽  
Refractive Index Measurement ◽  
Air Bubble ◽  
Index Measurement ◽  
Mach Zehnder Interferometer

scholarly journals High-Sensitivity, Large Dynamic Range Refractive Index Measurement Using an Optical Microfiber Coupler

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5078 ◽  
Author(s):  
Wang ◽  
Li ◽  
Fu ◽  
Li
Keyword(s):  
Refractive Index ◽  
Turning Point ◽  
Dynamic Range ◽  
Free Spectral Range ◽  
High Sensitivity ◽  
Fringe Order ◽  
Refractive Index Measurement ◽  
Index Measurement ◽  
Optical Microfiber ◽  
Index Unit

Wavelength tracking methods are widely employed in fiber-optic interferometers, but they suffer from the problem of fringe order ambiguity, which limits the dynamic range within half of the free spectral range. Here, we propose a new sensing strategy utilizing the unique property of the dispersion turning point in an optical microfiber coupler mode interferometer. Numerical calculations show that the position of the dispersion turning point is sensitive to the ambient refractive index, and its position can be approximated by the dual peaks/dips that lay symmetrically on both sides. In this study, we demonstrate the potential of this sensing strategy, achieving high sensitivities of larger than 5327.3 nm/RIU (refractive index unit) in the whole refractive index (RI) range of 1.333–1.4186. This sensor also shows good performance in narrow RI ranges with high resolution and high linearity. The resolution can be improved by increasing the length of the coupler.

Sign in / Sign up

Export Citation Format

Share Document