Axial strain sensor based on microfiber couplers operating at the dispersion turning point

2022 ◽  
pp. 1-1
Author(s):  
Jiajie Wen ◽  
Xiangyu Yan ◽  
Xu Gao ◽  
Kaiwei Li ◽  
Jiajia Wang
Keyword(s):  
Turning Point ◽  
Axial Strain ◽  
Strain Sensor

scholarly journals High Sensitive FBG Based Muscular Strain Sensor

2017 ◽  
Vol 6 (2) ◽  
pp. 71 ◽  
Author(s):  
R. D. Koozekanani ◽  
S. Makouei
Keyword(s):  
Fiber Bragg Grating ◽  
Axial Strain ◽  
Strain Sensor ◽  
Single Mode ◽  
Bone Diseases ◽  
Bragg Grating ◽  
Biomechanical Behavior ◽  
Musculoskeletal Structure ◽  
The One ◽  
Bragg Grating Sensor

Assessment of biomechanical behavior of human musculoskeletal structure is essential to recognize bone diseases and to design proper medical devices.  The skeleton system basically adapts to mechanical loadings. Thus, monitoring the bone deformation under load is of great importance to attain better analysis and interpretation.  In recent years, Fiber Bragg Grating sensing devices have been developed and used to monitor strain and temperature of skeleton system.  In this work a Fiber Bragg Grating sensor is designed holding a 1.54 pmµε-1 axial strain sensitivity which is almost 30% higher than the one achieved so far.  The improvement in sensitivity is achieved by adjusting single-mode optical fiber parameters of the structure.

Fibre axial strain sensor based on a microwave photonic filter with dual-passband

2018 ◽  
Vol 65 (14) ◽  
pp. 1737-1741 ◽  
Author(s):  
Jianghai Wo ◽  
Jin Zhang ◽  
Anle Wang ◽  
Pengfei Du ◽  
Yalan Wang ◽  
...  
Keyword(s):  
Axial Strain ◽  
Strain Sensor ◽  
Microwave Photonic

Spring-Steel Pipe Fiber Bragg Grating Strain Sensor

2014 ◽  
Vol 620 ◽  
pp. 233-237
Author(s):  
Li Peng ◽  
Chuan Li ◽  
Zhen Gang Zhao ◽  
Sheng Wu ◽  
Ying Na Li
Keyword(s):  
Fiber Bragg Grating ◽  
Axial Strain ◽  
Strain Sensor ◽  
Optical Loss ◽  
Spring Steel ◽  
Steel Pipe ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Repeatability Error ◽  
The Stability

Structure’s strain reflects the stability of the project, the excessive structural strain will destroy the stability of the structure. Fiber Bragg Grating has many features, such as, strong anti-interference ability, low optical loss, and it can be used for a long time in the project, etc. Base on the features, the Fiber Bragg Grating Strain Sensor can be used in slope and other projects for the long-term monitoring. In this paper, we develop a Fiber Bragg Grating Strain Sensor based on the spring-steel pipe, FBG be fixed to the inner of the steel pipe by epoxy glue, it is protected by a stainless steel pipe outside, the Flange be fixed to the both side of the spring-steel pipe. When the tension acting one the flanges, the spring-steel pipe occurs an axial strain, this axial strain makes the center wavelength of the Fiber Bragg Grating change, measuring the wavelength shift amount of the Fiber Bragg Grating can calculate the strain. The loading experiment indicates that the sensitivity of the Spring-steel pipe Fiber Bragg Grating Strain Sensor is 0.81pm/με, the linearity of the sensor is 2.1%FS, and the repeatability error of the sensor is 2.29%FS.

scholarly journals Ultra-Sensitive Intensity Modulated Strain Sensor by Tapered Thin-Core Fiber Based Modal Interferometer

Photonics ◽  
2021 ◽  
Vol 8 (9) ◽  
pp. 372
Author(s):  
Chuanxu Liu ◽  
Dexue Sun ◽  
Jiuru Yang ◽  
Hui Zhang ◽  
Lingling Ran
Keyword(s):  
Light Field ◽  
Axial Strain ◽  
Beam Propagation Method ◽  
Temperature Response ◽  
Strain Sensor ◽  
Quantitative Relationship ◽  
Wavelength Shift ◽  
Strain Response ◽  
Core Fiber ◽  
Intensity Loss

In this paper, to enhance practicality, a novel tapered thin-core fiber (t-TCF) based modal interferometer is proposed and demonstrated experimentally. The light field distribution of t-TCF structure is investigated by a beam propagation method, and the quantitative relationship is gained between light intensity loss and waist diameter. Under ~30 μm waist diameter, multiple t-TCF based sensor heads are fabricated by arc-discharged splicing and taper techniques, and comprehensive tests are performed with respects to axial strain and temperature. The experimental results show that, with near-zero wavelength shift, obvious intensity strain response is exhibited and negative-proportional to the reduced length of TCF. Thus, the maximum sensitivity reaches 0.119 dB/με when the TCF length is equal to 15 mm, and a sub-micro-strain detection resolution (about 0.084 με) is obtained. Besides, owing to the flat red-shifted temperature response, the calculated cross-sensitivity of our sensor is compressed within 0.32 με/°C, which is promising for high precision strain related engineering applications.

Axial strain sensor based on long-period fiber gratings

2014 ◽  
Author(s):  
Tao Geng ◽  
Shixin Geng ◽  
Wenlei Yang ◽  
Tian Ye ◽  
Zhaojun Liu ◽  
...  
Keyword(s):  
Axial Strain ◽  
Strain Sensor ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings

Summary

1999 ◽  
pp. 95
Author(s):  
Editorial board Of the Journal
Keyword(s):  
Turning Point ◽  
Religious Studies ◽  
The Self ◽  
Social Teaching ◽  
World Outlook ◽  
The Social

In the 10th issue of the Bulletin “Ukrainian Religious Studies” in the rubric “Scientific Reports and Announcements” there are in particular the following papers: “Religious Studies and Theology” by A.Kolodny, “Activity of the Orthodox Mission in Ukraine on the Turning Point of the XIX-XXth Centuries” by G.Nadtoka, “Religion in the Spiritual Heritage of V.Lypinsky” by L.Kondratyk, “Church as a Factor of the Self-identification of the Nation in the Cultural and Civilization Environment” by O.Nedavnya, “The Problems of Development of The Social Teaching of the Catholicism” by V.Sergyiko, “The God-Thunder Perun in the Pagan World-outlook of the Ancient Rus’” by N.Fatyushyna and other papers

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