A precision fiber Bragg grating interrogation system using long-wavelength vertical-cavity surface-emitting laser

Hu, Binxin; Jin, Guangxian; Liu, Tongyu; Wang, Jinyu

doi:10.1007/s13320-016-0339-3

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…6 Due to its conceptual simplicity, this kind of structure is easy to fabricate and applies to many technological elds, including ber communication systems, optical disk reading, laser printers, and sensing. [7][8][9][10][11] The main drawback of these systems is the need for expensive and time consuming epitaxial manufacturing to obtain high quality VCSELs based on crystalline emitters. 4,12,13 However, in pursuing simplicity and cost reduction, techniques like solution processing or extrusion are attracting increasing interest.…”

Section: Introductionmentioning

confidence: 99%

Lasing from dot-in-rod nanocrystals in planar polymer microcavities

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Lasing from dot-in-rod nanocrystals in planar polymer microcavities

et al. 2018

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“…To produce an FBG-based axle counter, a smart compact interrogator has been specifically developed, as sketched in Figure 1a. The light source is a VCSEL that brings numerous advantages, such as serial manufacturing, low threshold current, reduced footprint, low electrical power consumption and cost-effectiveness [14,[17][18][19]. The VCSEL used in this study operates around 1550 nm-the most used wavelength range for telecommunications and fiber Bragg grating sensing-and can be tuned over a wavelength range of ~10 nm, allowing for reasonably interrogating a maximum of five FBGs cascaded along the fiber.…”

Section: Fbgs and Smart Interrogatormentioning

confidence: 99%

Smart Railway Traffic Monitoring Using Fiber Bragg Grating Strain Gauges

Esbeen

Finet

Vandebrouck

et al. 2022

Sensors

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There is today ample evidence that fiber Bragg gratings (FBGs) distributed along a railway track can provide robust axle counting and bring numerous assets compared to competing technologies in this practical environment. This work brings two relevant originalities with respect to the state-of-the-art solutions. First, a study of the strain distribution in the rail cross-section is performed to determine the sensitivity according to the charge and the position on the rail. Secondly, the technology is deployed along the rail track as a smart object where the sensor head is composed of four FBG wavelength-division-multiplexed in a single telecommunication-grade optical fiber and interrogated by a miniaturized read-out device. Two FBGs ensure the detection of the train direction and another two bring the required redundancy to reach a safety integrity level (SIL) 4. The read-out unit has been specifically developed for the application and contains a vertical-cavity surface-emitting laser (VCSEL) and a photodiode driven by a high-speed microprocessor unit that processes the data and communicates the useful information, i.e., the number of axles. On-field tests confirm that the proposed approach makes the installation process easier while it democratizes the technology.

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“…However, the system is susceptible to the influence of the laser wavelength drift noise, which limits the wavelength demodulation accuracy because the system does not have a standard wavelength reference. [7] proposed a VCSEL-based fiber grating demodulation method using the acetylene absorption peak as the reference wavelength, greatly improving the demodulation accuracy. However, the laser needs an additional temperature control system, increasing power consumption and cost.…”

Section: Introductionmentioning

confidence: 99%

A VCSEL-based temperature-adaptive FBG demodulation system

Zhang,

Wang,

Chi

et al. 2024

Fourth International Conference on Sensors and Information Technology (ICSI 2024)

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A temperature-adaptive Fiber Bragg Grating (FBG) demodulation system based on a long-wavelength Vertical-Cavity Surface Emitting laser (VCSEL) is designed to reduce power consumption and cost in this paper. The temperature-adaptive FBG system is described in detail through the sections of VCSEL characterisation and selection, selection of the methane absorption peak wavelength and matching with the laser scanning wavelength range, selection of the fiber grating wavelength and matching with the laser scanning wavelength range, and calculation of the FBG wavelength change. The experimental results show that the system has an effective scanning wavelength range of 3.7 nm in the operating environment of 10~40°C without temperature control, and it has the characteristics of low power consumption, low cost and miniaturisation, which can be used as a sensing node in wireless sensing networks.

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A precision fiber Bragg grating interrogation system using long-wavelength vertical-cavity surface-emitting laser

Cited by 7 publications

References 14 publications

Lasing from dot-in-rod nanocrystals in planar polymer microcavities

Lasing from dot-in-rod nanocrystals in planar polymer microcavities

Smart Railway Traffic Monitoring Using Fiber Bragg Grating Strain Gauges

A VCSEL-based temperature-adaptive FBG demodulation system

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