Highly sensitive temperature and strain sensor based on fiber Sagnac interferometer with Vernier effect

Zhang, Wujun; Wu, Xuqiang; Zuo, Cheng; Gui, Lei; Shi, Jinhui; Zhao, Xiaonan; Mu, Shengquan; Liu, Jiaran; Yu, Benli

doi:10.1016/j.optcom.2021.127543

Cited by 36 publications

(9 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This configuration yielded sensitivities of 9.95×10−4 nm ppb−1 for Ni2+, 2.31×10−4 nm ppb−1 for Zn2+, and 4×10−4 nm ppb−1 for Na+. Interferometric sensors are further categorized based on their principle of operation into Mach–Zehnder interferometers (MZI), 66 , 67 Fabry–Perot interferometers (FPI), 68 , 69 Michelson interferometers (MI), 70 , 71 and Sagnac interferometers, 72 , 73 each with specific applications and advantages.…”

Section: Classification and Basic Principles Of Optical Fiber Sensormentioning

confidence: 99%

Optical fiber sensors for water and air quality monitoring: a review

Lyu,

Huang,

et al. 2023

Opt. Eng.

View full text Add to dashboard Cite

Owing to their advantages of anti-electromagnetic interference, chemical resistance, high sensitivity, and fast response time, optical fiber sensors (OFSs) are widely used in biomedical, environmental monitoring, and food safety fields. We introduce the classification and principles of OFSs and summarize the applications and research progress of OFSs in water quality detection (heavy metals and microorganisms) and air quality monitoring (COx , NOx , and VOCs). Meanwhile, analytical performance, reliability, and environmental adaptability of OFSs are discussed and prospected.

show abstract

Section: Classification and Basic Principles Of Optical Fiber Sensormentioning

confidence: 99%

Optical fiber sensors for water and air quality monitoring: a review

Lyu,

Huang,

et al. 2023

Opt. Eng.

View full text Add to dashboard Cite

show abstract

“…As shown in Figure 3 , the optical fiber is the isotropic medium, the shear stress can be ignored, and the deformation quantity is related only to normal stress. The whole phase change caused by the sound field can be received as [ 5 , 14 , 15 , 16 ].

where E f is the elasticity modulus of the optical fiber, μ f is the Poisson ratio of the optical fiber, p 11 and p 12 are the elastic-optic coefficient tensors, p 11 is decided by linear stress and linear strain, p 12 is decided by torsional stress and torsional strain, n is the initial refractive index, and P is the sound pressure.…”

Section: Pick-up Configuration and Theory Analysismentioning

confidence: 99%

An Improved Acoustic Pick-Up for Straight Line-Type Sagnac Fiber Optic Acoustic Sensing System

Chen

Wang

et al. 2022

Sensors

View full text Add to dashboard Cite

An improved acoustic pick-up is presented to enhance the acoustic sensing sensitivity of the straight line-type Sagnac fiber optic acoustic sensing system. A hollow elastomer cylinder is introduced into the system, and the optical fiber is tightly wound around the cylinder to construct the pick-up. The theoretical analysis was finished, and it showed that the improved pick-up will bring in an extra phase change and let the phase difference increase almost an order. The extra phase change will enhance the sensing sensitivity correspondingly. The titanium alloy elastic cylinder was designed and manufactured. The experiment system was built, and a sinusoidal acoustic signal was used as the sound source. The tests were taken during 100–1500 Hz, and the experimental study showed that the sensitivity was more than 130 mV/Pa when the pick-up was used as the acoustic sensing element, and compared to the fiber only system, the sensitivity was enhanced more than 71.2%. The improved pick-up will be helpful in sound recognition and expand the application area of the Sagnac acoustic sensing system.

show abstract

“…In the past few decades, optical fiber temperature sensors have been used in various industries, such as oil, aerospace, and fire safety, and they have attracted growing interest due to their many advantages, such as small size, light weight, and immunity to electromagnetic interference. There are many types of optical fiber temperature sensors, including optical Fabry-Perot (F-P) temperature sensors, 1 , 2 fiber Bragg grating temperature sensors, 3 – 5 Mach-Zehnder interference temperature sensors, 6 – 9 Sagnac interference temperature sensors, 10 – 12 etc. Among these, optical fiber F-P temperature sensors have attracted wide attention from scholars in various fields because of their high sensitivity and simple structure.…”

Section: Introductionmentioning

confidence: 99%

Optical fiber Fabry-Perot temperature sensor based on metal welding technology

Chen

Wang

2023

J. Nanophoton.

View full text Add to dashboard Cite

We present an optical fiber Fabry-Perot (F-P) temperature sensor based on metal welding technology. The fiber sensor is composed of a single-mode fiber and a metal capillary that are encapsulated by metal welding technology. The relationship between the cavity length and sensitivity is analyzed theoretically. The experimental results show that the sensitivity of the fabricated sensor reaches 3.85 nm∕°C when the F-P cavity length is 171 μm. In addition, the sensitivity of the F-P temperature sensor increases as the cavity length of the F-P temperature sensor decreases. The proposed sensor fabricated by metal welding technology has the advantages of a high sensitivity, simple fabrication, simple structure, and low cost.

show abstract

Highly sensitive temperature and strain sensor based on fiber Sagnac interferometer with Vernier effect

Cited by 36 publications

References 20 publications

Optical fiber sensors for water and air quality monitoring: a review

Optical fiber sensors for water and air quality monitoring: a review

An Improved Acoustic Pick-Up for Straight Line-Type Sagnac Fiber Optic Acoustic Sensing System

Optical fiber Fabry-Perot temperature sensor based on metal welding technology

Contact Info

Product

Resources

About