A PDMS-Coated Optical Fiber Bragg Grating Sensor for Enhancing Temperature Sensitivity

Park, Chang-sub; Joo, K.; Kang, Shin‐Won; Kim, Hak‐Rin

doi:10.3807/josk.2011.15.4.329

Cited by 89 publications

(35 citation statements)

References 17 publications

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“…Another common problem in silicon photonic devices is the temperature dependence of the optical properties due to the thermo-optic effect of silicon [21]. Although the thermal expansion effect has been considered in some research on optical sensors [38] but variation of the silicon refractive index with temperature has not been taken into account in the previous research on PC switches and modulators, whereas it has a considerable effect on the optical properties of the devices. As an example a 38℃ temperature variation corresponds to variation of 6.8×10 -3 in refractive index which is enough to perform switching in some PC switches [24,25].…”

Section: Introductionmentioning

confidence: 95%

Compact and Temperature Independent Electro-optic Switch Based on Slotted Silicon Photonic Crystal Directional Coupler

Aghababaeian

Samiei

2012

Journal of the Optical Society of Korea

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In this paper, we have proposed a principle to design a compact and temperature independent electro-optic switch based on a slotted photonic crystal directional coupler (SPCDC). Infiltration of the slotted silicon photonic crystal with polymer enhances the slow light and decreases the switching length, whereas the different signs of thermo-optic coefficients of the polymer and silicon make the proposed switch stable within 25℃ to 85℃ temperature range. The SPCDC structure is modified to increase poling efficiency of the polymer in the slot and to flatten the dispersion diagram of the even mode to minimize the switching length.

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Section: Introductionmentioning

confidence: 95%

Compact and Temperature Independent Electro-optic Switch Based on Slotted Silicon Photonic Crystal Directional Coupler

Aghababaeian

Samiei

2012

Journal of the Optical Society of Korea

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“…These techniques utilise polymer materials having a thermo-optic coefficient higher than silica. Such polymer materials are typically coated onto the surface of the cladding of optical fibres used as sensors, for example demonstrating improved sensitivities of 255.4 pm/ o C for the LPG sensor, which is more than four times higher than those of a conventional uncoated FBG sensor [2,3]. In our previous report [15], we investigated a singlemode-multimode-singlemode-multimodesinglemode (SMSMS) fibre structure.…”

Section: Introductionmentioning

confidence: 99%

“…In order to improve sensitivity, polymer coated fibre sensors have been proposed [2] such as a PDMS coated LPG and FBG. These techniques utilise polymer materials having a thermo-optic coefficient higher than silica.…”

Section: Introductionmentioning

confidence: 99%

“…Different types of optical fibre sensor structures have been developed including fibre Bragg gratings (FBG) [1,2], long period gratings (LPG) [3], special fibres such as D-shaped fibres and photonic crystal fibres [4,5], multimode fibres (MMF) [6,8], and multi-core fibres [9]. Grating-based temperature sensors are the most popular sensor type but they provide sensitivity in the range of only a few tenths of pm/ o C [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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High sensitivity temperature sensor based on a polymer filled hollow core optical fibre interferometer

Kumar

et al. 2017

SPIE Proceedings

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Northumbria University has developed Northumbria Research Link (NRL) to enable users to access the University's research output. Copyright © and moral rights for items on NRL are retained by the individual author(s) and/or other copyright owners. Single copies of full items can be reproduced, displayed or performed, and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided the authors, title and full bibliographic details are given, as well as a hyperlink and/or URL to the original metadata page. The content must not be changed in any way. Full items must not be sold commercially in any format or medium without formal permission of the copyright holder. The full policy is available online: http://nrl.northumbria.ac.uk/policies.html This document may differ from the final, published version of the research and has been made available online in accordance with publisher policies. To read and/or cite from the published version of the research, please visit the publisher's website (a subscription may be required.) High sensitivity temperature sensor based on a polymer filled hollow core optical fibre interferometer ABSTRACTA high-sensitivity temperature sensor based on a singlemode-multimode-polymer filled hollow core fibre-multimodesinglemode (SMHMS) fibre structure is proposed. This sensor was made from a short section of hollow core fibre filled with a high thermo-optic coefficient (TOC) polymer with a refractive index close to that of the fibre cladding, fusion spliced between two singlemode-multimode (SM) fibre structures. This sensor effectively improves the temperature sensitivity by over 200 times by comparison to a conventional singlemode-multimode-singlemode (SMS) fibre structure. In this report, we experimentally demonstrate that the proposed sensor provides a high temperature sensitivity of 2.16 nm/C.

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“…The FBG is capable of reflecting particular wavelengths of light and transmitting all others and it is also very sensitive to external perturbation change including temperature, strain, bending, loading, and vibration [2][3][4][5]. In order to measure the wavelength shift with variations in external perturbations, the interrogation techniques, which can detect the optical intensity with respect to the wavelength shift, have been developing promisingly [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Long distance fiber Bragg grating strain sensor interrogation using high speed Raman-based Fourier domain mode-locked fiber laser with recycled residual Raman pump

2012

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Abstract:We propose a novel fiber Bragg grating (FBG) sensor interrogation using a Raman-based Fourier-domain mode locking (FDML) fiber laser for a high speed and long distance measurement. A residual Raman pump after the generation of the Raman-based FDML fiber laser is recycled for secondary signal amplification in a 2-m erbium-doped fiber (EDF) to further enhance the output power. The chromatic dispersion is precisely controlled to suppress the phase noise in the FDML laser cavity, resulting in the improvement of an R-number of 1.43 mm/dB. After recycling residual pump, we achieve the 40-km round trip transmission of the sensing probe signal with a high scan rate of 30.8 kHz. With 205-mW residual pump power, the bandwidth and the maximum gain are measured to be more than 50 nm, 10.3 dB at 1550 nm, respectively. The sensitivity of the proposed Raman-based FDML fiber laser to strain is also measured, which are 0.81 pm/μstrain in the spectral domain and 0.19 ns/μstrain in the time domain, respectively.

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A PDMS-Coated Optical Fiber Bragg Grating Sensor for Enhancing Temperature Sensitivity

Cited by 89 publications

References 17 publications

Compact and Temperature Independent Electro-optic Switch Based on Slotted Silicon Photonic Crystal Directional Coupler

Compact and Temperature Independent Electro-optic Switch Based on Slotted Silicon Photonic Crystal Directional Coupler

High sensitivity temperature sensor based on a polymer filled hollow core optical fibre interferometer

Long distance fiber Bragg grating strain sensor interrogation using high speed Raman-based Fourier domain mode-locked fiber laser with recycled residual Raman pump

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