Optical fiber vector flow sensor based on a silicon Fabry–Perot interferometer array

Liu, Guigen; Sheng, Qiwen; Hou, Weilin; Han, Ming

doi:10.1364/ol.41.004629

Cited by 37 publications

(24 citation statements)

References 16 publications

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“…(C) Fourier transforms. (D) Wavelength division multiplexing of a silicon F‐P interferometer array for vector flow detection 77 . (E) Time division and wavelength division multiplexing of F‐P acoustic sensors 29 .…”

Section: Multiplexing Mechanismsmentioning

confidence: 99%

“…Different from the multiplexing of FBG sensors, the WDM of F‐P sensors is realized by coarse wavelength division multiplexer/demultiplexer (CWDM) or dense wavelength division multiplexer/demultiplexer (DWDM). As shown in Figure 5(D), Liu et al proposed a four sensor array fiber‐optic vector flow sensor 77 . Sensors 1–4 are connected to the 1530, 1550, 1570, and 1590 nm channels of CWDM, respectively.…”

Section: Multiplexing Mechanismsmentioning

confidence: 99%

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Fast interrogation of dynamic low‐finesse Fabry‐Perot interferometers: A review

Liu

Peng

2021

Micro & Optical Tech Letters

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Low‐finesse fiber‐optic Fabry–Perot (F‐P) interferometric sensor has the advantages of high sensitivity, anti‐electromagnetic interference, and compact size, and is one of the most widely used optical fiber sensors. With the development of sensor design and demodulation algorithms, F‐P sensing technique plays an increasingly important role in high‐speed dynamic measurement, such as dynamic temperature or pressure, acoustic vibration, dynamic displacement, and distance. Signal demodulation methods largely determine the performance of the entire sensing system. Compared with quasi‐static measurement, high‐precision measurement of dynamic F‐P cavity is more challenging. The advancement of fast tunable laser technology in telecommunication field provides novel perspectives for demodulation methods and dynamic applications based on F‐P sensors. This article reviews the latest developments in fast interrogation techniques for dynamic low‐finesse F‐P sensors, including intensity demodulation, quadrature phase demodulation and absolute cavity length demodulation. In addition, array multiplexing and multi‐parameter measurement techniques are also involved.

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Section: Multiplexing Mechanismsmentioning

confidence: 99%

Section: Multiplexing Mechanismsmentioning

confidence: 99%

Fast interrogation of dynamic low‐finesse Fabry‐Perot interferometers: A review

Liu

Peng

2021

Micro & Optical Tech Letters

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“…Optical thermal flow sensors utilize primarily optically heated fiber tips [5,6] or fiber sections [7,8], which also incorporate optical temperature sensors [5][6][7][8]. Many different fiber-optic flow sensor designs have been proposed in recent years, and they are based mainly on spectrally resolved fiber-optic sensors, such as Fiber Bragg gratings (FBG) [7][8][9][10][11][12] or Fabry-Perot interferometers (FPI) [5,6,[13][14][15]. Flow sensors that utilize FBGs usually comprise the FBG inscribed into a special optical fiber that contains light-absorbing material at, or in the vicinity of, the grating, and allows for optical induced heating of the sensing (FBG) area.…”

Section: Introductionmentioning

confidence: 99%

Optical Micro-Wire Flow-Velocity Sensor

Njegovec

Pevec

Đonlagić

2021

Sensors

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This paper presents a short response time, all-silica, gas-flow-velocity sensor. The active section of the sensor consists of a 16 µm diameter, highly optically absorbing micro-wire, which is heated remotely by a 980 nm light source. The heated microwire forms a Fabry–Perot interferometer whose temperature is observed at standard telecom wavelengths (1550 nm). The short response time of the sensor allows for different interrogation approaches. Direct measurement of the sensor’s thermal time constant allowed for flow-velocity measurements independent of the absolute heating power delivered to the sensor. This measurement approach also resulted in a simple and cost-efficient interrogation system, which utilized only a few telecom components. The sensor’s short response time, furthermore, allowed for dynamic flow sensing (including turbulence detection). The sensor’s bandwidth was measured experimentally and proved to be in the range of around 22 Hz at low flow velocities. Using time constant measurement, we achieved a flow-velocity resolution up to 0.006 m/s at lower flow velocities, while the resolution in the constant power configuration was better than 0.003 m/s at low flow velocities. The sensing system is constructed around standard telecommunication optoelectronic components, and thus suitable for a wide range of applications.

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“…Detecting direction requires two or more independent temperature sensors in the vicinity of a heat source. In an optical fiber this can be achieved using multicore fibers [8], but more common are the realization of heaters and nearby thermometers in micro-electro-mechanical-systems (MEMS) [9,10,11]. Their fabrication remains costly and complex, and assembly procedures to integrate these sensors within a fluidic conduit is challenging [12].…”

Section: Introductionmentioning

confidence: 99%

Mass Flow Monitoring by Distributed Fiber Optical Temperature Sensing

Jderu

Enăchescu

Ziegler³

2019

Sensors

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We developed a novel method to monitor mass flow based on distributed fiber optical temperature sensing. Examination of the temporal and spatial temperature distribution along the entire length of a locally heated fluidic conduit reveals heat flow under forced convection. Our experimental results are in good agreement with two-dimensional finite element analysis that couples fluid dynamic and heat transfer equations. Through analysis of the temperature distribution bidirectional flow rates can be measured over three orders of magnitude. The technique is not flow intrusive, works in harsh conditions, including high-temperatures, high pressures, corrosive media, and strong electromagnetic environments. We demonstrate a first experimental implementation on a short fluidic system with a length of one meter. This range covers many applications such as low volume drug delivery, diagnostics, as well as process and automation technology. Yet, the technique can, without restrictions, be applied to long range installations. Existing fiber optics infrastructures, for instance on oil pipelines or down hole installations, would only require the addition of a heat source to enable reliable flow monitoring capability.

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Optical fiber vector flow sensor based on a silicon Fabry–Perot interferometer array

Cited by 37 publications

References 16 publications

Fast interrogation of dynamic low‐finesse Fabry‐Perot interferometers: A review

Fast interrogation of dynamic low‐finesse Fabry‐Perot interferometers: A review

Optical Micro-Wire Flow-Velocity Sensor

Mass Flow Monitoring by Distributed Fiber Optical Temperature Sensing

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