Study on Optical Fiber Sensor Capable of Discriminating Strain and Temperature using Fiber Transmission Grating Based on High Birefringence Photonic Crystal Fiber

2019 ◽  
Vol 33 (9) ◽  
pp. 1-8
Author(s):  
Sungwook Choi ◽  
Do Kyung Kim ◽  
Yong Wook Lee
Keyword(s):  
Photonic Crystal ◽  
Optical Fiber ◽  
Photonic Crystal Fiber ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Transmission Grating ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Fiber Transmission

Bend-Insensitive Discrimination of Strain and Temperature Based on Fiber Transmission Grating Inscribed on High Birefringence Photonic Crystal Fiber

2021 ◽  
Vol 21 (3) ◽  
pp. 1948-1954
Author(s):  
Jinsil Han ◽  
Jihoon Kim ◽  
Seul-Lee Lee ◽  
Sungwook Choi ◽  
Yong Wook Lee
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Optical Fiber Sensor ◽  
Strain Range ◽  
Wavelength Shift ◽  
Measured Temperature ◽  
Transmission Grating ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Fiber Transmission

In this paper, we propose a bend-insensitive optical fiber sensor capable of separately measuring strain and temperature by incorporating a fiber transmission grating (FTG) inscribed on high birefringence photonic crystal fiber (HBPCF) with a CO2 laser. The FTG was fabricated by exposing unjacketed HBPCF to CO2 laser pulses using the line-by-line technique. The FTG inscribed on HBPCF, referred to as the HBPC-FTG, has two resonance dips with different wavelengths depending on input polarization. These two resonance dips were utilized as sensor indicator dips denoted by a shorter wavelength dip (SD) and a longer wavelength dip (LD). The strain and temperature responses of the SD and LD were investigated in a strain range of 0 to 3105 μ and a temperature range of 30 to 85 °C, respectively. The measured strain sensitivities of the SD and LD at room temperature (25 °C) were approximately −0.46 and −0.58 pm/μ, respectively. Similarly, the measured temperature sensitivities of the SD and LD without applied strain (0 μ) were ˜5.99 and ˜9.89 pm/°C, respectively. Owing to their linear and independent responses to strain and temperature, strain and temperature changes applied to the HBPC-FTG can be simultaneously estimated from the measured wavelength shifts of the two indicator dips (i.e., SD and LD) using their predetermined strain and temperature sensitivities. Moreover, bend-induced spectral variations of the SD and LD were also examined in a curvature range of 0–4.705 m−1, and it was observed that both dips showed little wavelength shift due to applied bending. Thus, it is concluded from the experimental results that the fabricated HBPC-FTG can be employed as a cost-effective sensor head for bend-insensitive discrimination of strain and temperature.

scholarly journals Magneto-optical fiber sensor based on bandgap effect of photonic crystal fiber infiltrated with magnetic fluid

2012 ◽  
Vol 101 (24) ◽  
pp. 241118 ◽  
Author(s):  
Peng Zu ◽  
Chi Chiu Chan ◽  
Tianxun Gong ◽  
Yongxing Jin ◽  
Wei Chang Wong ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Optical Fiber ◽  
Photonic Crystal Fiber ◽  
Magnetic Fluid ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Crystal Fiber

High sensitivity dual core photonic crystal fiber sensor for simultaneous detection of two samples

2022 ◽  
Author(s):  
Pibin Bing ◽  
Guifang Wu ◽  
Qing Liu ◽  
Zhongyang Li ◽  
Lian Tan ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Optical Fiber ◽  
Photonic Crystal Fiber ◽  
Fiber Sensor ◽  
Synchronous Detection ◽  
Detection Range ◽  
Crystal Fiber ◽  
Two Samples ◽  
Dual Core ◽  
Air Hole

Abstract The optical control ability of photonic crystal fiber (PCF) is a distinctive property suitable for improving sensing and plasma performance. This article proposes a dual-core D-channel PCF sensor that can detect two samples simultaneously, which effectively solves the problems of coating difficulty and low wavelength sensitivity. The PCF has four layers of air holes, which dramatically reduces the optical fiber loss and is more conducive to the application of sensors in actual production. In addition, by introducing dual cores on the upper and lower sides of the central air hole, reducing the spacing between the core and the gold nanolayer, a stronger evanescent field can be generated in the cladding air hole. The optical fiber sensor can detect the refractive index of two samples simultaneously with a maximum sensitivity of 21300 nm/RIU. To the best of our knowledge, the sensitivity achieved in this work is the highest sensitivity with the dual sample synchronous detection sensors. The detection range of the refraction index is 1.35-1.41, and the resolution of the sensor is 4.695×10-6. Overall, the sensor will be suitable for medical detection, organic chemical sensing, analyte detection, and other fields.

scholarly journals A Highly Birefringent Photonic Crystal Fiber for Terahertz Spectroscopic Chemical Sensing

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1799
Author(s):  
Tianyu Yang ◽  
Liang Zhang ◽  
Yunjie Shi ◽  
Shidi Liu ◽  
Yuming Dong
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Chemical Sensing ◽  
Numerical Aperture ◽  
Wide Band ◽  
Relative Sensitivity ◽  
Chemical Sensitivity ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Polarization Maintaining

A photonic crystal fiber (PCF) with high relative sensitivity was designed and investigated for the detection of chemical analytes in the terahertz (THz) regime. To ease the complexity, an extremely simple cladding employing four struts is adopted, which forms a rectangular shaped core area for filling with analytes. Results of enormous simulations indicate that a minimum 87.8% relative chemical sensitivity with low confinement and effective material absorption losses can be obtained for any kind of analyte, e.g., HCN (1.26), water (1.33), ethanol (1.35), KCN (1.41), or cocaine (1.50), whose refractive index falls in the range of 1.2 to 1.5. Besides, the PCF can also achieve high birefringence (∼0.01), low and flat dispersion, a large effective modal area, and a large numerical aperture within the investigated frequency range from 0.5 to 1.5 THz. We believe that the proposed PCF can be applied to chemical sensing of liquid and THz systems requiring wide-band polarization-maintaining transmission and low attenuation.

Nonlinear photonic crystal fiber with high birefringence made of silicate glass

2006 ◽  
Author(s):  
Przemyslaw Szarniak ◽  
Matteo Foroni ◽  
Ryszard Buczynski ◽  
Dariusz Pysz ◽  
Piotr Wasylczyk ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Silicate Glass ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Nonlinear Photonic Crystal
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