Ultra-High-Sensitivity Temperature Sensor Using a Fiber Loop Mirror Based on a Water-Filled Asymmetric Two-Hole Fiber

Martínez-Manuel, Rodolfo; May-Arrioja, Daniel A.; Acevedo-Mijangos, J.; Domínguez-Cruz, René Fernando; López-Cortés, D.; Torres-Cisneros, M.

doi:10.1109/jsen.2020.2974889

Cited by 12 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As our fiber cross section is relatively large (larger than 10 µm), its coupling efficiency with conventional optical fibers can be as large as 90% using an appropriate coupler-for example, the fused biconical tapering technique [13], which makes the propagation of light possible in the prospective setup. Furthermore, the previous tests on liquid-filled Sagnac interferometer fiber sensors show consistent, accurate, and stable results [6,14], which makes the proposed sensor a potential candidate in many industrial applications.…”

Section: Optical Materialssupporting

confidence: 64%

Liquid-Filled Highly Asymmetric Photonic Crystal Fiber Sagnac Interferometer Temperature Sensor

et al. 2020

View full text Add to dashboard Cite

In this paper, we theoretically designed and numerically studied a high-resolution and ultrasensitive photonic crystal fiber temperature sensor by selective filling of a liquid with high thermo-optic coefficient in one of the airholes of the fiber. The finite element method was utilized to study the propagation characteristics and the modal birefringence of the fiber under different ambient temperatures. A large base birefringence value of 7.7 × 10−4 as well as a large birefringence sensitivity of almost 29% to a 10 °C temperature variation was achieved for the optimized fiber design with liquid chloroform between 15 °C and 35 °C. We also studied the performance of the proposed optical fiber in a temperature sensing Sagnac interferometer. An average linear temperature sensitivity of 17.53 nm/°C with an average resolution of 5.7 × 10−4 °C was achieved over a temperature range of 20 °C (15 °C to 35 °C).

show abstract

Section: Optical Materialssupporting

confidence: 64%

Liquid-Filled Highly Asymmetric Photonic Crystal Fiber Sagnac Interferometer Temperature Sensor

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Due to the fact that l sa is formed by bonding the free ends of SMF on the silica glass substrate and the thermal expansion effect of silica can be considered to be hardly affected by the polymer glue with much smaller Young's modulus [34], we have dl sa = αl sa dT, here α (5.4 × 10 −7 /°C) denotes the thermal expansion coefficient of silica [41]. Therefore, the temperature sensing sensitivity can be expressed as Here, dn sa /dT (−1.24 × 10 −4 /°C) denote the thermo-optic coefficient (TOC) of water [41]. Compared with the expression of RI sensing sensitivity, the temperature sensing sensitivity can be also expressed as…”

Section: Resultsmentioning

confidence: 99%

“…Since dn eff /dT is approximately equal to the TOC of silica (1.18 × 10 −5 /°C [41]), the temperature cross-sensitivity is approximately proportional to the RI sensing sensitivity; higher RI sensing sensitivity involves higher temperature cross-sensitivity, and the temperature cross-sensitivity is estimated to be about 172 nm/°C when the RI sensing sensitivity is −1.26 × 10 6 nm/RIU. Thus, the accurate temperature compensation is needed for the dual-path MZI in the actual RI sensing applications.…”

Section: Resultsmentioning

confidence: 99%

Dual-Path Mach—Zehnder Interferometers With Unequal Geometrical Path Length for Ultrasensitive Refractive Index Sensing

Liao

Wang

et al. 2021

J. Lightwave Technol.

View full text Add to dashboard Cite

High-sensitivity fiber-optic interferometric refractive index sensors (FIRSs) have been of interest to researchers due to their potential to fabricate specific physical, chemical, and biological sensors. Fabricating interferometers working near the dispersion turning point (DTP) is an effective approach to improve the sensitivity of FIRSs. However, the group effective refractive index (RI) difference approaching 0 and the ratio of the variation of the effective RI difference to the external RI change being −1 cannot be simultaneously realized in low RI sensing, which restricts the further improvement of sensing sensitivity. Here, dual-path Mach-Zehnder interferometers (MZIs) with unequal geometrical path length are proposed for ultrasensitive RI sensing. The dual-path MZIs contain fiber path and sample path of different geometrical lengths to form the optical path difference. The dual-path MZIs can not only show a turning point where the sensing sensitivity tends to be infinite, which is similar to the previously reported DTP, but also get the constant value −1 for the RI response factor, leading to the result that the dips within an over-500-nm band width around the turning point can achieve high sensitivity reaching 10 5 nm/RIU level or higher. Ultrahigh sensitivity of −1.26 × 10 6 nm/RIU has been experimentally demonstrated at the RI around 1.35022. The dual-path MZIs proposed here may enlighten new ideas for developing high-sensitivity FIRSs.

show abstract

Research on temperature sensing characteristics of fiber side-open cavity structure

Lin

Zhao

et al. 2022

Measurement

View full text Add to dashboard Cite

Ultra-High-Sensitivity Temperature Sensor Using a Fiber Loop Mirror Based on a Water-Filled Asymmetric Two-Hole Fiber

Cited by 12 publications

References 25 publications

Liquid-Filled Highly Asymmetric Photonic Crystal Fiber Sagnac Interferometer Temperature Sensor

Liquid-Filled Highly Asymmetric Photonic Crystal Fiber Sagnac Interferometer Temperature Sensor

Dual-Path Mach—Zehnder Interferometers With Unequal Geometrical Path Length for Ultrasensitive Refractive Index Sensing

Research on temperature sensing characteristics of fiber side-open cavity structure

Contact Info

Product

Resources

About