Electrical - Electronic Engineering / Elektrik - Elektronik Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/11

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Author: search.filters.author.Yüksel, KıvılcımPublisher: search.filters.publisher.Elsevier Ltd.

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Now showing 1 - 3 of 3
  • Article
    Citation - WoS: 28
    Citation - Scopus: 30
    Optical Fiber Sensor System for Remote and Multi-Point Refractive Index Measurement
    (Elsevier Ltd., 2016) Yüksel, Kıvılcım
    A Fresnel-reflection-based RI sensor using SMF fiber tips as sensing points interrogated by multi-wavelength OTDR from a distant location (up to several tens of kilometers) has been reported. The advantage of the system compared to previous work is that the distance between sensor points is not limited by the spatial resolution of OTDR. Experimental work demonstrated that the proposed sensor is capable of measuring refractive index of liquid chemicals with a precision of 1.7 × 10−4. This sensor prototype have strong conveniences (simple installation requirements, fast response and reliability in harsh environment) compared to previous Fresnel-based RI sensors which makes it a very good option for environmental monitoring systems. © 2016 Elsevier B.V.
  • Article
    Citation - WoS: 14
    Citation - Scopus: 15
    Analytical Investigation of a Novel Interrogation Approach of Fiber Bragg Grating Sensors Using Optical Frequency Domain Reflectometry
    (Elsevier Ltd., 2016) Yüksel, Kıvılcım; Pala, Deniz
    This work presents a novel approach in interrogating Polarization Dependent Loss (PDL) of cascaded identical FBGs using Optical Frequency Domain Reflectometer (OFDR). The fundamentals of both polarisation properties of uniform FBGs and polarisation-sensitive OFDR are explained and the benefits of this novel approach in measuring transversal load are discussed. The numerical programs computing the spectral evolution of PDL of the FBGs in the array as a function of grating parameters (grating length and birefringence) are presented. Our simulation results show an excellent agreement with the previously reported simulation (and experimental) results in the literature obtained on a single FBG by using classical state-of-the-art measurement techniques. As an envisaged application, the proposed system shows the feasibility of measuring the residual stresses during manufacturing process of composite materials which is not straightforward by amplitude spectrum measurements and/or considering only the axial strains. © 2016 Elsevier Ltd. All rights reserved.
  • Article
    Citation - WoS: 3
    Infrared Radiation Detector Interrogated by Optical Frequency-Domain Reflectometer
    (Elsevier Ltd., 2012) Yüksel, Kıvılcım; Caucheteur, Christophe; Renoirt, Jean-Michel; Debliquy, Marc; Mégret, Patrice; Wuilpart, Marc
    We experimentally demonstrated a fast infrared (IR) radiation sensor. It is capable of measuring IR radiation independently from the environmental temperature fluctuations. Experimental work shows that this IR detection prototype have strong conveniences (fast response and reliability in harsh environment) compared to previous detectors which makes it a very good option for early fire detection systems. © 2011 Elsevier Ltd. All rights reserved.