A temperature-insensitive strain sensor using a fiber Bragg grating

Zhuo, Zhongchang; Ham, Byoung S.

doi:10.1016/j.yofte.2009.07.004

Cited by 22 publications

(10 citation statements)

References 13 publications

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“…In these applications, the FBG is controlled by an external environment such as temperature [5][6][7]. The sensitivity of the Bragg wavelength to temperature arises from the change in period associated with the thermal expansion of the fiber coupled with a change in the refractive index arising from the thermo-optic [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Thermal Dependence of the Spectral Response of Polymer Optical Fiber Bragg Gratings

Hisham¹

2016

IJEEE

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The thermal dependence of the spectral response (i.e. transmission, reflection and time delay (τ r) responses) of uniform polymer optical fiber (POF) Bragg gratings has been investigated. In addition to the temperature dependence, the effects of grating strength (kL g) and fiber index modulation (∆n) have been investigated. Besides high capability of tunable wavelength due to the unique large and negative thermo-optic coefficient of POF, the spectral response for POF Bragg gratings show high stability and larger spectrum bandwidth with temperature variation compare with the silica optical fiber (SOF) Bragg gratings, especially with the increase of the kL g value. It was found that by increasing kL g , the peak reflectance value increases and the bandwidth of the Bragg reflector become narrower. Also it's shown by increasing the kL g value, τ r deceasing significantly and reach its minimum value at the designed wavelength (λ B). Furthermore, the τ r for POF Bragg gratings is less than that for SOF Bragg gratings at the same value of kL g. Also it's found that the peak reflectivity value increases to around 60% when the ∆n value increases from 1ˣ10-4 to 5ˣ10-4 .

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Thermal Dependence of the Spectral Response of Polymer Optical Fiber Bragg Gratings

Hisham¹

2016

IJEEE

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“…In the last decade, a lot of research study on the optical fiber strain sensor including the fiber Bragg grating (FBG) has been reported [1,2]. The quasi-distributed multipoint measurement system based on Michelson interferometer and FBG, can be utilized to realize multi-sensing or spatial division multiplexing system [3,4].…”

Section: Introductionmentioning

confidence: 99%

Fiber-optic interferometry strain sensor with optical ruler assisted Stepper Motor

Tsou

Hsu

Tseng³

et al. 2012

2012 17th Opto-Electronics and Communications Conference

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“…Various types of FBG sensors have been developed for the measurement of numerous physical parameters, including temperature [2,3] strain [4][5][6][7], pressure [8][9][10], vibration [11], current [12], etc. Most of the FBG sensors developed in early times belong to passive sensors which require additional light source to provide the power supply.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, low mutual coupling levels are usually welcomed in array antennas. The reduction of mutual coupling for microstrip patch antenna has been well studied, where the suppression of surface wave propagation is the major technique [6]. However, the mutual coupling suppression for LTSA is seldom mentioned.…”

Section: Introductionmentioning

confidence: 99%

An active strain sensing system based on single‐longitudinal‐mode distributed Bragg reflector fiber laser and its applications in the measurement of erbium‐doped fiber birefringence

Zhang

Liu

Jia

2011

Micro & Optical Tech Letters

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TL theory. Our calculations show that the CNT interconnects can transmit a signal for large distances, several hundred times their diameter. Both isolated tubes and bundles exhibited near loss-free signal propagation over lengths as large as 5 lm for a large range of mean free paths. Our results show that crystalline bundles could have a minimum of 10 times speed advantage over singlewalled CNTs. This is due to the lower kinetic inertia observed in the bundles as well as the lower effective contact resistance. However, they appear more prone to phonon-induced scattering compared to the single-walled nanotubes.ABSTRACT: An active strain sensing system based on singlelongitudinal-mode distributed Bragg reflector fiber laser is proposed and experimentally demonstrated. Owing to the short laser cavity length and birefringence-induced mode splitting, the proposed laser in singlelongitudinal-mode operation provides a beat signal from 1.598 to 2.53 GHz as the strain applied onto the fiber laser changes, and through beat frequency interrogation the proposed laser sensor turns out a strain sensitivity of $0.21 MHz/le. Moreover, by simultaneously monitoring the laser wavelength and beat frequency, strain dependence of erbium-doped fiber birefringence has also been measured, and experimental results show that erbium-doped fiber birefringence has a strain sensitivity of $1.59 Â 10 À9 /le.ABSTRACT: An antipodal linearly tapered slot antenna fed by substrate integrated waveguide for Ku band application is presented. To reduce the mutual coupling between elements, several slots are cut both on the radiation arms and between radiation elements to chock the coupling currents. With this approach, the measured mutual coupling levels between antenna elements are reduced to lower than À27 dB within 13-17 GHz.

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A temperature-insensitive strain sensor using a fiber Bragg grating

Cited by 22 publications

References 13 publications

Numerical Analysis of Thermal Dependence of the Spectral Response of Polymer Optical Fiber Bragg Gratings

Numerical Analysis of Thermal Dependence of the Spectral Response of Polymer Optical Fiber Bragg Gratings

Fiber-optic interferometry strain sensor with optical ruler assisted Stepper Motor

An active strain sensing system based on single‐longitudinal‐mode distributed Bragg reflector fiber laser and its applications in the measurement of erbium‐doped fiber birefringence

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