Hybrid all-fiber sensor for simultaneous strain and temperature measurements based on Mach–Zehnder interferometer

Najari, Montassar; Javan, A.; Amiri, Nasrin

doi:10.1016/j.ijleo.2015.05.066

Cited by 22 publications

(8 citation statements)

References 23 publications

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“…Therefore, from (18), it has been found that the phase shift is proportional to temperature. Let the applied lightwave in one port of MZI be E in .…”

Section: Methods Of Approachmentioning

confidence: 99%

“…The normalised power of output port-1 has been used for the transmission purpose. Therefore, from (18) and 21, we obtain…”

Section: Methods Of Approachmentioning

confidence: 99%

“…Urrutia et al [17] have presented a novel cost-efficient approach for temperature sensing based on a half-coated long-period grating. A fibre-optic sensor for detection of temperature and strain is proposed by Najari et al [18] in which two different types of MZIs have been used. The sensing method based on the joint evaluation of the strain and of strain/temperature measurement-based MZI.…”

Section: Introductionmentioning

confidence: 99%

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Design of an optical temperature transmitter for inflammable industry

Mandal

Mondal

Sarkar³

2019

IET Science, Measurement & Technology

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“…Therefore, from (18), it has been found that the phase shift is proportional to temperature. Let the applied lightwave in one port of MZI be E in .…”

Section: Methods Of Approachmentioning

confidence: 99%

“…The normalised power of output port-1 has been used for the transmission purpose. Therefore, from (18) and 21, we obtain…”

Section: Methods Of Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of an optical temperature transmitter for inflammable industry

Mandal

Mondal

Sarkar³

2019

IET Science, Measurement & Technology

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“…Fiber sensors can take advantage of diverse smart processing technologies and the novel materials [23,24,25,26,27]. The sensors mentioned above operate via a range of sensing mechanisms including [28,29,30,31,32,33,34,35,36,37,38,39]: interferometry (measuring optical phase), intensity (measuring the change in the guided light power); spectrometry (measuring changes in optical resonant frequency or wavelength of an optical cavity); polarimetry (measuring polarization state of the guided light); and diffraction (measuring frequency of lightwave interfering with a periodic structure). Among optical fiber sensing methods, fiber Bragg grating (FBG) sensors, in particular, have attracted great interest because of their unique properties, which open up many opportunities for single-point sensing of many parameters in hard-to-reach spaces, with controllable cross-sensitivities and very compact size, making them suitable for embedded measurement.…”

Section: Introductionmentioning

confidence: 99%

Fiber Bragg Grating Sensors for the Oil Industry

Qiao

Shao

Bao

et al. 2017

Sensors

168

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With the oil and gas industry growing rapidly, increasing the yield and profit require advances in technology for cost-effective production in key areas of reservoir exploration and in oil-well production-management. In this paper we review our group’s research into fiber Bragg gratings (FBGs) and their applications in the oil industry, especially in the well-logging field. FBG sensors used for seismic exploration in the oil and gas industry need to be capable of measuring multiple physical parameters such as temperature, pressure, and acoustic waves in a hostile environment. This application requires that the FBG sensors display high sensitivity over the broad vibration frequency range of 5 Hz to 2.5 kHz, which contains the important geological information. We report the incorporation of mechanical transducers in the FBG sensors to enable enhance the sensors’ amplitude and frequency response. Whenever the FBG sensors are working within a well, they must withstand high temperatures and high pressures, up to 175 °C and 40 Mpa or more. We use femtosecond laser side-illumination to ensure that the FBGs themselves have the high temperature resistance up to 1100 °C. Using FBG sensors combined with suitable metal transducers, we have experimentally realized high- temperature and pressure measurements up to 400 °C and 100 Mpa. We introduce a novel technology of ultrasonic imaging of seismic physical models using FBG sensors, which is superior to conventional seismic exploration methods. Compared with piezoelectric transducers, FBG ultrasonic sensors demonstrate superior sensitivity, more compact structure, improved spatial resolution, high stability and immunity to electromagnetic interference (EMI). In the last section, we present a case study of a well-logging field to demonstrate the utility of FBG sensors in the oil and gas industry.

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“…Various nanoscale Si based waveguides have been reported in literature earlier [24][25][26][27][28][29].…”

mentioning

confidence: 99%

Nanoscale Silicon Waveguide Based Thermo-Optic Sensor Using a Compact Mach-Zehnder Interferometer

Rizal

Niraula

2016

Preprint

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A compact Mach-zehnder interferometer with a novel design of directional couplers and a phase shifter has been presented as a thermo-optical sensor. With the aim of reducing device size to micro and nano dimension silicon-on-insulator technology was employed. That allowed miniaturization of device size through the reduction of its cross sectional area to 0.066 μm 2 and the radius of curvature of both the arms of the directional coupler and S-bends of the phase shifter to 5 μm and C-bends to 3 μm. These nano size device dimensions made it possible to reduce the coupling gap to 0.2 μm, which resulted in a significant reduction in the coupling length. The device geometry and its performance characteristics were analyzed and optimized using coupled mode analysis and finite difference time domain simulation tools, respectively. The wavelength dependent transmission loss of the device was measured at different temperature to verify and validate its performance characteristics. Tested devices showed a remarkable temperature dependent transmission characteristic offering significant changes in transmission loss band -with as low as 0.45 0 C change in substrate temperature. The extinction ratio and the free spectral range of the device were 26 dB and 0.26 nm respectively in the wavelength range of 1549.5 nm -1550.5 nm. These results imply that the devices presented here can be used as compact and highly sensitive thermal sensors and optical switches.

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Hybrid all-fiber sensor for simultaneous strain and temperature measurements based on Mach–Zehnder interferometer

Cited by 22 publications

References 23 publications

Design of an optical temperature transmitter for inflammable industry

Design of an optical temperature transmitter for inflammable industry

Fiber Bragg Grating Sensors for the Oil Industry

Nanoscale Silicon Waveguide Based Thermo-Optic Sensor Using a Compact Mach-Zehnder Interferometer

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