Current sensor based on microfiber knot resonator

Lim, Kok-Sing; Harun, Sulaiman Wadi; Damanhuri, S S A; Jasim, Ali Abdulhadi; Tio, C.K.; Ahmad, Harith

doi:10.1016/j.sna.2011.02.036

Cited by 121 publications

(67 citation statements)

References 9 publications

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“…0.97. The result agrees very well with an earlier work by Lim et al [5], which demonstrates that the shift of the resonant wavelength of microfibre knot resonator (MKR) is proportional to the square of the conducting current, which can be expressed in the form of…”

Section: Mmzi Current Sensorssupporting

confidence: 92%

Microfibre Mach–Zehnder interferometer and its application as a current sensor

et al. 2012

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The authors demonstrate a microfibre Mach-Zehnder interferometer (MMZI) using a single silica optical microfibre fabricated using flame-heated-drawing technique. The microfibre was cut into two parts: the first part is stretched straight, whereas the second part is bent and manipulated to form an MMZI. The fabricated MMZI shows good interference fringes with the highest extinction ratio of 14 dB. The free spectral range (FSR) of the interferometer can be tuned from 0.14 to 0.75 nm by micromanipulating the path-length difference of the MMZI under an optical microscope. It is also observed that the FSR is unaffected by the volatility of the surrounding air. The MMZI is also used to demonstrate a compact current sensor. The proposed sensor uses a copper wire, which touching one arm of the MMZI so that the wavelength shift is linearly proportional to the square of the amount of the flowing current. The slope efficiency of the sensor is obtained at 60.17 pm/A 2 .

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Section: Mmzi Current Sensorssupporting

confidence: 92%

Microfibre Mach–Zehnder interferometer and its application as a current sensor

et al. 2012

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“…The microfiber knot resonator (MKR) has a wide range of possible sensing applications, such as humidity, 1 temperature, 2 3 acoustic wave vibration, 4 current, 5 and solution-concentration sensings. 6 Light travelling inside the loop of the knot resonator (in an approximately circular shape) creates an evanescent field at the outer surface that can be used for very effective sensing purposes.…”

Section: Introductionmentioning

confidence: 99%

Effect of titanium dioxide (TiO₂) nanoparticle coating on the detection performance of microfiber knot resonator sensors for relative humidity measurement

Faruki¹,

Razak²,

Azzuhri³

et al. 2016

mat express

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In this study, the sensitivity and the linearity of the un-coated and TiO 2 -coated microfiber knot resonator (MKR) have been analyzed. The MKR is very sensitive to humidity changes since its refractive index is strongly humidity dependent. As a result, shifts occur in the resonance wavelength and there are also changes in output power. The un-coated MKR showed a sensitivity of 1.3 pm/%RH, in terms of the resonance wavelength, and a sensitivity of 0.0626 dB/%RH for the transmitted output power. The sensitivity increased greatly after the deposition of a porous TiO 2 nanoparticle coating on the MKR. The TiO 2 -coated MKR showed an improved sensitivity of 2.5 pm/%RH, with respect to the resonance wavelength, and 0.0836 dB/%RH for the transmitted output power. This MKR sensor has the potential for use in a variety of humidity sensing applications.

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“…The thermal properties of the microfiber knot were further investigated in [148]. Current sensor was also realized by wrapping the microfiber knot around the copper wire which has electric current transmitting through it [149]. The resonant wavelength shift was due to the thermally induced optical phase shift, which was owing to the heat produced by the flow of current in the copper wire.…”

Section: Microfiber Knotsmentioning

confidence: 99%

Recent Developments in Micro-Structured Fiber Optic Sensors

Chen

et al. 2017

Fibers

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Recent developments in fiber-optic sensing have involved booming research in the design and manufacturing of novel micro-structured optical fiber devices. From the conventional tapered fiber architectures to the novel micro-machined devices by advanced laser systems, thousands of micro-structured fiber-optic sensors have been proposed and fabricated for applications in measuring temperature, strain, refractive index (RI), electric current, displacement, bending, acceleration, force, rotation, acoustic, and magnetic field. The renowned and unparalleled merits of sensors-based micro-machined optical fibers including small footprint, light weight, immunity to electromagnetic interferences, durability to harsh environment, capability of remote control, and flexibility of directly embedding into the structured system have placed them in highly demand for practical use in diverse industries. With the rapid advancement in micro-technology, micro-structured fiber sensors have benefitted from the trends of possessing high performance, versatilities and spatial miniaturization. Here, we comprehensively review the recent progress in the micro-structured fiber-optic sensors with a variety of architectures regarding their fabrications, waveguide properties and sensing applications.

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Current sensor based on microfiber knot resonator

Cited by 121 publications

References 9 publications

Microfibre Mach–Zehnder interferometer and its application as a current sensor

Microfibre Mach–Zehnder interferometer and its application as a current sensor

Effect of titanium dioxide (TiO₂) nanoparticle coating on the detection performance of microfiber knot resonator sensors for relative humidity measurement

Recent Developments in Micro-Structured Fiber Optic Sensors

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Current sensor based on microfiber knot resonator

Cited by 121 publications

References 9 publications

Microfibre Mach–Zehnder interferometer and its application as a current sensor

Microfibre Mach–Zehnder interferometer and its application as a current sensor

Effect of titanium dioxide (TiO2) nanoparticle coating on the detection performance of microfiber knot resonator sensors for relative humidity measurement

Recent Developments in Micro-Structured Fiber Optic Sensors

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Effect of titanium dioxide (TiO₂) nanoparticle coating on the detection performance of microfiber knot resonator sensors for relative humidity measurement