Multimode interference devices with single-mode–multimode–multimode fiber structure

2014 ◽  
Vol 53 (23) ◽  
pp. 5179 ◽  
Author(s):  
Nitin Bhatia ◽  
Joseph John
Keyword(s):  
Single Mode ◽  
Multimode Interference ◽  
Fiber Structure ◽  
Multimode Fiber

Investigation on a compact in-line multimode-single-mode-multimode fiber structure

2016 ◽  
Vol 80 ◽  
pp. 16-21 ◽  
Author(s):  
Bin Yin ◽  
Yang Li ◽  
Zhi-bo Liu ◽  
Suchun Feng ◽  
Yunlong Bai ◽  
...  
Keyword(s):  
Single Mode ◽  
Fiber Structure ◽  
Multimode Fiber

A Dual-parameter Fabry–Perot Interferometer Sensor Based on Single Mode-Photonic Crystal-Multimode Fiber Structure

2019 ◽  
Vol 62 (3) ◽  
pp. 426-431
Author(s):  
Zhou Kangpeng ◽  
He Wei ◽  
Zhang Wen ◽  
Dong Mingli ◽  
Zhu Lianqing
Keyword(s):  
Photonic Crystal ◽  
Single Mode ◽  
Fiber Structure ◽  
Multimode Fiber ◽  
Fabry Perot

scholarly journals Fiber Vector Bend Sensor Based on Multimode Interference and Image Tapping

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 321
Author(s):  
Ziyang Zhang ◽  
Aashia Rahman ◽  
Julia Fiebrandt ◽  
Yu Wang ◽  
Kai Sun ◽  
...  
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Bend Angle ◽  
Multimode Interference ◽  
Multimode Fiber ◽  
Bend Radius ◽  
Light Intensity Distribution ◽  
Imaging Processing ◽  
Core Fiber ◽  
Bend Sensor

A grating-less fiber vector bend sensor is demonstrated using a standard single mode fiber spliced to a multimode fiber as a multimode interference device. The ring-shaped light intensity distribution at the end of the multimode fiber is subject to a vector transition in response to the fiber bend. Instead of comprehensive imaging processing for the analysis, the image can be tapped out by a seven-core fiber spliced to the other end of the multimode fiber. The seven-core fiber is further guided to seven single mode fibers via a commercial fan-out device. By comparing the relative light intensities received at the seven outputs, both the bend radius and its direction can be determined. Experiment has shown that a slight bend displacement of 10 µm over a 1.2-cm-long multimode fiber in the X direction (bend angle of 0.382°) causes a distinctive power imbalance of 4.6 dB between two chosen outputs (numbered C4 and C7). For the same displacement in the Y direction, the power ratio between the previous two outputs C4 and C7 remains constant, while the imbalance between another pair (C3 and C4) rises significantly to 7.0 dB.

A Compact Refractometer With High Sensitivity Based on Multimode Fiber Embedded Single Mode-No Core-Single Mode Fiber Structure

2020 ◽  
Vol 38 (7) ◽  
pp. 1929-1935 ◽  
Author(s):  
Shuo Zhang ◽  
Sifan Deng ◽  
Zemin Wang ◽  
Tao Geng ◽  
Wenlei Yang ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Fiber Structure ◽  
Multimode Fiber

scholarly journals High Sensitivity Refractometer Based on a Tapered-Single Mode-No Core-Single Mode Fiber Structure

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1722 ◽  
Author(s):  
Yang ◽  
Zhang ◽  
Geng ◽  
Li ◽  
Li ◽  
...  
Keyword(s):  
Refractive Index ◽  
Contrast Ratio ◽  
High Sensitivity ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Experimental Investigations ◽  
Multimode Interference ◽  
Fiber Structure ◽  
Index Unit ◽  
Good Agreement

We have proposed a novel tapered-single mode-no core-single mode (TSNS) fiber refractometer based on multimode interference. The TSNS structure exhibits a high contrast ratio (＞15 dB) and a uniform interference fringe. The influence of different lengths and diameters of the TSNS on the refractive index unit (RIU) sensitivity was investigated. The experimental investigations indicated a maximum sensitivity of 1517.28 nm/RIU for a refractive index of 1.417 and low-temperature sensitivity (＜10 pm/ºC). The experimental and simulation results are also in good agreement.

Single-Mode-Multimode Fiber Structure Based Sensor for Simultaneous Measurement of Refractive Index and Temperature

2013 ◽  
Vol 13 (11) ◽  
pp. 4220-4223 ◽  
Author(s):  
Hongchao Xue ◽  
Hongyun Meng ◽  
Wei Wang ◽  
Rui Xiong ◽  
Qiqi Yao ◽  
...  
Keyword(s):  
Refractive Index ◽  
Simultaneous Measurement ◽  
Single Mode ◽  
Fiber Structure ◽  
Multimode Fiber
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