scholarly journals A Fiber Ring Laser Sensor with a Side Polished Evanescent Enhanced Fiber for Highly Sensitive Temperature Measurement

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 586
Author(s):  
Weihao Lin ◽  
Yibin Liu ◽  
Liyang Shao ◽  
Mang I. Vai
Keyword(s):  
Temperature Sensor ◽  
Ring Laser ◽  
High Sensitivity ◽  
Laser Cavity ◽  
Single Mode ◽  
Laser Sensor ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Highly Sensitive ◽  
Side Polished Fiber

We demonstrate a highly sensitive and practical fiber-based temperature sensor system. The sensor is constructed based on a fiber ring laser (FRL) as well as a side-polished fiber filled with isopropanol. The laser cavity of the sensing part fiber is polished by the wheel fiber polishing system with residual thickness (RT) is selected to detect the temperature in the FRL. Thanks to the high thermo-optic coefficient of isopropanol, the sensitivity of the proposed temperature sensor could be effectively improved by filling isopropanol in the cost-less side polished single mode fiber. Refractive index (RI) of isopropanol changes with the surrounding temperature variation allowing high-sensitivity temperature sensing. Experimental results demonstrate that the side polished fiber can efficiently excite high-order cladding modes which enhance the modular interference increase the interaction between the evanescent wave and the isopropanol. Besides, the results show that the sensitivity can be as high as 2 nm/°C in the temperature range of 25 °C–35°C.

High-sensitivity sucrose erbium-doped fiber ring laser sensor

2017 ◽  
Vol 56 (2) ◽  
pp. 026116 ◽  
Author(s):  
Wurood Abdulkhaleq Khaleel ◽  
Abdul Hadi M. Al-Janabi
Keyword(s):  
Ring Laser ◽  
High Sensitivity ◽  
Laser Sensor ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Erbium Doped

scholarly journals Liquid Crystal-Embedded Hollow Core Fiber Temperature Sensor in Fiber Ring Laser

2021 ◽  
Vol 11 (15) ◽  
pp. 7103
Author(s):  
Weihao Lin ◽  
Shengjie Zhou ◽  
Yibin Liu ◽  
Mang I. Vai ◽  
Liyang Shao
Keyword(s):  
Liquid Crystal ◽  
Temperature Variation ◽  
Temperature Sensor ◽  
Ring Laser ◽  
High Sensitivity ◽  
Microbial Culture ◽  
Hollow Core ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Core Fiber

An optical fiber temperature sensor based on Mach–Zehnder interferometer and thermo-optic effect of the liquid crystal (LC) in fiber ring laser (FRL) system is proposed and experimentally demonstrated. The LC is infiltrated into the core of hollow core fiber, and the resonant wavelength is more sensitive to temperature variation due to the interaction between the incident light and the cavity infiltrating liquid crystal with high thermal light coefficient. Meanwhile, the FRL system was further used to make the sensor have good performance in the case of high signal-to-noise ratio (∼35 dB), narrow half-height width (FWHM = 0.15 nm), and high sensitivity in the temperature range from 20 °C to 50 °C, with the maximum sensitivity of 1.318 nm/°C. As far as we know, in the FRL system, the liquid crystal material has a better temperature sensing performance than the previous fiber. Nevertheless, the system has the advantages of good repeatability, low cost, simple production, small volume, high sensitivity. In marine microbial culture and detection, it is necessary to carry out high sensitivity measurement within a small temperature variation range. This reliable and excellent temperature performance has a potential application prospect.

Highly Sensitive Fiber Ring Laser Sensor for Curvature Using a Modal Interferometer

2020 ◽  
Vol 20 (17) ◽  
pp. 9864-9870
Author(s):  
Javier Antonio Martin-Vela ◽  
Juan Manuel Sierra-Hernandez ◽  
Daniel Jauregui-Vazquez ◽  
Julian M. Estudillo-Ayala ◽  
Juan C. Hernandez-Garcia ◽  
...  
Keyword(s):  
Ring Laser ◽  
Laser Sensor ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Highly Sensitive

Polarization Control of SOA-Fiber Ring Laser

2010 ◽  
Vol 459 ◽  
pp. 157-161
Author(s):  
Yoshitaka Takahashi ◽  
Ryo Niida
Keyword(s):  
Numerical Analysis ◽  
Ring Laser ◽  
Laser Cavity ◽  
Laser Sensor ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Polarization Control ◽  
Accuracy And Stability

We have studied a SOA-fiber ring laser and demonstrated its application to a fiber ring laser sensor so far. But in our previous study its accuracy and stability was found to be insufficient. Further investigation by numerical analysis suggested that polarization of the propagating light should be stabilized in the fiber ring laser cavity. In order to control the polarization in the cavity, we have improved the laser. The lasing linewidth has reduced significantly, which shows that the polarization is controlled and stabilized well.

Highly sensitive dual-wavelength fiber ring laser sensor for the low concentration gas detection

2019 ◽  
Vol 296 ◽  
pp. 126637 ◽  
Author(s):  
Xianchao Yang ◽  
Liangcheng Duan ◽  
Haiwei Zhang ◽  
Ying Lu ◽  
Guangyao Wang ◽  
...  
Keyword(s):  
Ring Laser ◽  
Dual Wavelength ◽  
Gas Detection ◽  
Laser Sensor ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Low Concentration ◽  
Highly Sensitive

scholarly journals Temperature sensor based on Er-doped Cascaded-Peanut Taper Structure in-line interferometer in fiber ring laser

2021 ◽  
pp. 1-1
Author(s):  
Weihao Lin ◽  
Fang Zhao ◽  
Li-Yang Shao ◽  
Mang I Vai ◽  
Perry Ping Shum ◽  
...  
Keyword(s):  
Temperature Sensor ◽  
Ring Laser ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Er Doped

High-Resolution Temperature Sensor Based on Intracavity Sensing of Fiber Ring Laser

2020 ◽  
Vol 38 (7) ◽  
pp. 2010-2014 ◽  
Author(s):  
Jia Shi ◽  
Fan Yang ◽  
Wei Xu ◽  
Degang Xu ◽  
Hua Bai ◽  
...  
Keyword(s):  
High Resolution ◽  
Temperature Sensor ◽  
Ring Laser ◽  
Fiber Ring Laser ◽  
Fiber Ring

Liquid level sensor based on fiber ring laser with single-mode-offset coreless-single-mode fiber structure

2016 ◽  
Vol 84 ◽  
pp. 59-63 ◽  
Author(s):  
Zixiao Wang ◽  
Zhongwei Tan ◽  
Rui Xing ◽  
Linjun Liang ◽  
Yanhui Qi ◽  
...  
Keyword(s):  
Ring Laser ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Liquid Level ◽  
Fiber Structure ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Level Sensor ◽  
Liquid Level Sensor
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