Highly sensitive gas refractometer based on inverse mode-coupling of cladding-to-core modes in a tapered four-core fiber

2017 ◽  
Author(s):  
Zhihua Shao ◽  
Xueguang Qiao ◽  
Qiangzhou Rong
Keyword(s):  
Mode Coupling ◽  
Highly Sensitive ◽  
Core Fiber ◽  
Core Modes

Measurement of arbitrary superpositions of core modes in a multi-core fiber

2015 ◽  
Author(s):  
Hee Jung Lee ◽  
Han Seb Moon ◽  
Sang-Kyung Choi ◽  
Hee Su Park
Keyword(s):  
Core Fiber ◽  
Core Modes

scholarly journals No-core fiber-based highly sensitive optical fiber pH sensor

2017 ◽  
Vol 22 (5) ◽  
pp. 057001 ◽  
Author(s):  
Vanita Bhardwaj ◽  
Akhilesh Kumar Pathak ◽  
Vinod Kumar Singh
Keyword(s):  
Optical Fiber ◽  
Ph Sensor ◽  
Highly Sensitive ◽  
Core Fiber

scholarly journals In-Line Mach–Zehnder Interferometers Based on a Capillary Hollow-Core Fiber Using Vernier Effect for a Highly Sensitive Temperature Sensor

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5471
Author(s):  
Sigifredo Marrujo-García ◽  
Iván Hernández-Romano ◽  
Daniel A. May-Arrioja ◽  
Vladimir P. Minkovich ◽  
Miguel Torres-Cisneros
Keyword(s):  
Temperature Sensitivity ◽  
Temperature Sensor ◽  
Hollow Core ◽  
Multimode Fibers ◽  
Highly Sensitive ◽  
Attractive Candidate ◽  
Working Principle ◽  
Core Fiber ◽  
Vernier Effect ◽  
Insight Into

In this paper, we propose a highly sensitive temperature sensor based on two cascaded Mach–Zehnder interferometers (MZIs) that work using the Vernier effect. The all-fiber MZIs were assembled by splicing a segment of capillary hollow-core fiber (CHCF) between two sections of multimode fibers (MMFs). This cascaded configuration exhibits a temperature sensitivity of 1.964 nm/°C in a range from 10 to 70 °C, which is ~67.03 times higher than the sensitivity of the single MZI. Moreover, this device exhibits a high-temperature resolution of 0.0153 °C. A numerical analysis was carried out to estimate the devices’ temperature sensitivity and calculate the magnification of the sensitivity produced by the Vernier effect. The numerical results have an excellent agreement with the experimental results and provide a better insight into the working principle of the MZI devices. The sensor’s performance, small size, and easy fabrication make us believe that it is an attractive candidate for temperature measurement in biological applications.

scholarly journals High Sensitivity Terahertz Biosensor Based on Mode Coupling of a Graphene/Bragg Reflector Hybrid Structure

Biosensors ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 377
Author(s):  
Yamei Liu ◽  
Qiwen Zheng ◽  
Hongxia Yuan ◽  
Shenping Wang ◽  
Keqiang Yin ◽  
...  
Keyword(s):  
Refractive Index ◽  
Mode Coupling ◽  
Defect Mode ◽  
High Sensitivity ◽  
Hybrid Structure ◽  
Transmission Peak ◽  
Bragg Reflector ◽  
Highly Sensitive ◽  
Specific Parameter ◽  
Resonance Transmission

In this work, a high-sensitivity terahertz (THz) biosensor is achieved by using a graphene/Bragg reflector hybrid structure. This high-sensitivity THz biosensor is developed from the sharp Fano resonance transmission peak created by coupling the graphene Tamm plasmons (GTPs) mode to a defect mode. It is found that the proposed THz biosensor is highly sensitive to the Fermi energy of graphene, as well as the thickness and refractive index of the sensing medium. Through specific parameter settings, the composite structure can achieve both a liquid biosensor and a gas biosensor. For the liquid biosensor, the maximum sensitivity of >1000°/RIU is obtained by selecting appropriate parameters. We believe the proposed layered hybrid structure has the potential to fabricate graphene-based high-sensitivity biosensors.

scholarly journals Torsion sensor based on inter-core mode coupling in seven-core fiber

2018 ◽  
Vol 26 (16) ◽  
pp. 19835 ◽  
Author(s):  
Fengze Tan ◽  
Zhengyong Liu ◽  
Jiajing Tu ◽  
Changyuan Yu ◽  
Chao Lu ◽  
...  
Keyword(s):  
Mode Coupling ◽  
Core Mode ◽  
Core Fiber

scholarly journals In-Fiber Mach-Zehnder Interferometer Based on Three-Core Fiber for Measurement of Directional Bending

Sensors ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 205 ◽  
Author(s):  
Lei Ding ◽  
Yu Li ◽  
Cai Zhou ◽  
Min Hu ◽  
Yuli Xiong ◽  
...  
Keyword(s):  
Single Mode ◽  
Zehnder Interferometer ◽  
Swept Source ◽  
The Core ◽  
Biomedical Sensing ◽  
Highly Sensitive ◽  
Potential Applications ◽  
Core Fiber ◽  
Bending Sensor ◽  
Mach Zehnder Interferometer

A highly sensitive directional bending sensor based on a three-core fiber (TCF) Mach-Zehnder interferometer (MZI) is presented in this study. This MZI-based bending sensor was fabricated by fusion-splicing a section of TCF between two single-mode fibers (SMF) with core-offset. Due to the location of the core in the TCF, a bend applied to the TCF-based MZI led to an elongation or shortening of the core, which makes the sensor suitable for directional bending measurement. To analyze the bending characteristics, two types of TCF-based sensors, with the fusion-spliced core located at different positions between the SMFs, were investigated. A swept source was employed in the measurement technique. The experimental results showed that, for the two types of sensors in this setup, the bending sensitivities of the two sensors were 15.36 nm/m−1 and 3.11 nm/m−1 at the bending direction of 0°, and −20.48 nm/m−1 and −5.29 nm/m−1 at the bending direction of 180°. The temperature sensitivities of the two sensors were 0.043 nm/°C and 0.041 nm/°C, respectively. The proposed sensors are compact, versatile, inexpensive to fabricate, and are expected to have potential applications in biomedical sensing.

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