Gas Pressure Sensor With Low Detection Limit Based on Fabry-Perot Interferometer and Intracavity Sensing of Fiber Ring Laser

Meng, Dejun; Zhang, Xiao Ming; Wang, Donghan; Miao, Changyun; Shi, Jia; Li, Xianguo; Bai, Hua; Chen, Hongli; Guo, Chenghao; Yao, Jianquan

doi:10.1109/jsen.2022.3150230

Cited by 11 publications

(2 citation statements)

References 24 publications

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“…The fiber-optic vibration sensor is attracting attention because of its lightweight, simple structure, antielectromagnetic interference, and intrinsic explosion-proof characteristics, which can effectively solve the problem of long-term work in harsh working conditions. At present, the reported fiber-optic vibration sensor structures mainly include Fabry-Perot interferometer (FPI) [13][14][15], fiber Bragg grating (FBG) [16][17][18], Mach-Zehnder Interferometer (MZI) [19][20][21], etc. Yu et al proposed a fiber-optic vibration sensor with FPI using Kagome structured hollow-core photonic crystal fiber, with a single-frequency signal measurement range of 1 Hz to 20 kHz, but the sensor output signal would be slightly distorted [22].…”

Section: Introductionmentioning

confidence: 99%

Belt conveyor speed detection based on fiber-optic Sagnac interferometer vibration sensor

Hou,

Niu,

Shi

et al. 2024

Laser Phys.

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With their long transportation distance and high productivity, belt conveyors are characterized as the main equipment for bulk material transportation in coal mines and other key industries. However, its speed detection method has always been an engineering challenge under harsh working conditions. In this work, the elastic-optical effect of the polarization-maintaining fiber is used to design a fiber ring laser vibration sensing system based on a fiber-optic Sagnac interferometer vibration sensor and its packaging structure. The vibration detection is achieved by detecting the change in optical power at the working wavelength, and the belt conveyor speed measurement is completed by detecting the vibration frequency. With such a method, the belt conveyor speed measurement obtained a relative error of less than 1.88%. The proposed method bears the characteristics of anti-electromagnetic interference, intrinsic explosion-proof, and adapts to the harsh smoke and dust working environment, which has a wide range of application prospects in the fields of engineering, machinery, security, etc.

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Section: Introductionmentioning

confidence: 99%

Belt conveyor speed detection based on fiber-optic Sagnac interferometer vibration sensor

Hou,

Niu,

Shi

et al. 2024

Laser Phys.

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“…An FRL cavity is gradually regarded as a substitute for the BBS because of its high SNR and narrow linewidth [ 28 , 29 , 30 ]. The interference structure is usually designed in the cavity as the filter unit.…”

Section: Introductionmentioning

confidence: 99%

In-Line Mach Zehnder Interferometer Based on Ytterbium Doped Fiber with Up-Taper Structure in Fiber Ring Laser and Its Application in Sensing

Lin

Liu

Shum

et al. 2022

Sensors

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We report an ytterbium (Yb) doped fiber Mach Zehnder interferometer (MZI) based on the up-taper fiber structure in a fiber ring laser (FRL) cavity. Different from the traditional FRL sensing system, in which additional filters are required, the designed structure simultaneously acts as a filter, sensor and gain medium. Furthermore, thanks to the high thermal–optical coefficient of Yb doped fiber, the temperature sensitivity of 0.261 nm/°C can be achieved in the range of 10–50 °C. In addition, benefiting from the unique characteristics of the laser system itself, the designed structure has a narrower linewidth (−0.2 nm) and a higher signal-to-noise ratio (SNR) (−40 dB) than the sensor system based on a broadband light source (BBS). Meanwhile, the refractive index (RI) response and stability of the system are measured. The RI sensitivity is up to 151 nm/RIU, and the wavelength fluctuation range within two hours is less than 0.2 nm. Therefore, the designed structure is expected to play a significant role in human life safety monitoring, aircraft engine temperature monitoring, etc.

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Ultra‐Fast Shape‐Deformation and Highly‐Sensitive Detection of 4D Printed Electromagnetic Architectures

Zhang,

Xu,

et al. 2024

Adv Funct Materials

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Abstract4D printing is widely used in soft actuators, flexible electronic devices, and soft robotics. However, existing 4D printed architectures suffer from drawbacks such as long shape‐deformation response time or low sensitivity to external stimuli, which greatly limit their applications. To address these shortcomings, 4D printed electromagnetic architectures (EMAs) with both ultra‐fast shape‐deformation and highly‐sensitive detection capabilities have been proposed in this study. The EMA is composed of a 4D printed polymeric scaffold, along with magnetic and conductive parts. Experiments show that the EMA exhibits not only an ultra‐fast shape‐deformation response time as low as 0.007 s but also a high sensitivity to detect an external pressure down to 0.4 Pa, which is beyond records of all current 4D printing reports. Numerical simulation reveals the rapid shape‐deformation and sensing mechanism of EMAs. The effects of cell structures on the performances of EMAs are investigated by parameter optimization. Finally, a “sensing‐to‐deforming” system has been demonstrated, which can smartly distinguish objects by pressures and then trap or release them by the shape deformation. This work realized the effective coupling of ultra‐rapid shape‐deformation and ultra‐low stress sensing of 4D printed architectures and provided an effective method for integrated development of smart devices in deformation and sensing.

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Gas Pressure Sensor With Low Detection Limit Based on Fabry-Perot Interferometer and Intracavity Sensing of Fiber Ring Laser

Cited by 11 publications

References 24 publications

Belt conveyor speed detection based on fiber-optic Sagnac interferometer vibration sensor

Belt conveyor speed detection based on fiber-optic Sagnac interferometer vibration sensor

In-Line Mach Zehnder Interferometer Based on Ytterbium Doped Fiber with Up-Taper Structure in Fiber Ring Laser and Its Application in Sensing

Ultra‐Fast Shape‐Deformation and Highly‐Sensitive Detection of 4D Printed Electromagnetic Architectures

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