Multimode interference device in a rounded rectangle-core fiber

2018 ◽  
Author(s):  
Julia Fiebrandt ◽  
Ziyang Zhang ◽  
Dionne Haynes ◽  
Yu Wang ◽  
Kai Sun ◽  
...  
Keyword(s):  
Multimode Interference ◽  
Core Fiber ◽  
Rounded Rectangle

scholarly journals Exposed-core fiber multimode interference sensor

2021 ◽  
pp. 100125
Author(s):  
Jonas H. Osório ◽  
William M. Guimarães ◽  
Lu Peng ◽  
Marcos A.R. Franco ◽  
Stephen C. Warren-Smith ◽  
...  
Keyword(s):  
Multimode Interference ◽  
Core Fiber

Single-Mode to 61 Spots Divider With Multimode Interference in Hexagonal Core Fiber

2018 ◽  
Vol 30 (14) ◽  
pp. 1337-1340 ◽  
Author(s):  
Ziyang Zhang ◽  
Julia Fiebrandt ◽  
Dionne Haynes ◽  
Yu Wang ◽  
Kai Sun ◽  
...  
Keyword(s):  
Single Mode ◽  
Multimode Interference ◽  
Core Fiber

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.

Widely Tunable Thulium-Doped Fiber Laser Based On Multimode Interference With a Large No-Core Fiber

2014 ◽  
Vol 32 (19) ◽  
pp. 3234-3238 ◽  
Author(s):  
Xiaowei Ma ◽  
Daru Chen ◽  
Qingguo Shi ◽  
Gaofeng Feng ◽  
Junyong Yang
Keyword(s):  
Fiber Laser ◽  
Multimode Interference ◽  
Core Fiber

scholarly journals Optical Fiber Sensor for Temperature and Strain Measurement Based on Multimode Interference and Square-Core Fiber

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1239
Author(s):  
Kun Wang ◽  
Xingchen Dong ◽  
Patrick Kienle ◽  
Maximilian Fink ◽  
Wolfgang Kurz ◽  
...  
Keyword(s):  
Temperature Sensor ◽  
Strain Measurement ◽  
Optical Fiber Sensor ◽  
High Sensitivity ◽  
Single Mode ◽  
Fiber Sensor ◽  
Multimode Interference ◽  
Strain Sensing ◽  
Maximal Power ◽  
Core Fiber

A variety of specialty fibers such as no-core fiber (NCF) have already been studied to reveal their sensing abilities. In this work, we investigate a specialty fiber, square-core fiber, for temperature and strain sensing. A simple single-mode–multimode–single-mode (SMS) fiber sensor was fabricated, consisting of a 30-cm-long square-core fiber. The experimental results indicate that the maximal wavelength-temperature and wavelength-strain sensitivities are −15.3 pm/∘C and −1.5 pm/με, respectively, while the maximal power-temperature and power-strain sensitivities are 0.0896 dBm/∘C and 0.0756 dBm/με. Analysis of the results suggests that the fiber sensor has the potential to be used as a high-sensitivity temperature sensor with a low strain sensitivity.

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