Dinleyici, Mehmet Salih
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Dinleyici, M. Salih
Dinleyici, Mehmet S.
Dinleyici, M. S.
Dinleyici, MS
Salih, Dinleyici Mehmet
Dinleyici, Mehmet S.
Dinleyici, M. S.
Dinleyici, MS
Salih, Dinleyici Mehmet
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Email Address
salihdinleyici@iyte.edu.tr
Main Affiliation
03.05. Department of Electrical and Electronics Engineering
Status
Current Staff
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Sustainable Development Goals
1NO POVERTY
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2ZERO HUNGER
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3GOOD HEALTH AND WELL-BEING
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4QUALITY EDUCATION
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5GENDER EQUALITY
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6CLEAN WATER AND SANITATION
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7AFFORDABLE AND CLEAN ENERGY
3
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8DECENT WORK AND ECONOMIC GROWTH
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9INDUSTRY, INNOVATION AND INFRASTRUCTURE
8
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10REDUCED INEQUALITIES
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11SUSTAINABLE CITIES AND COMMUNITIES
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12RESPONSIBLE CONSUMPTION AND PRODUCTION
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13CLIMATE ACTION
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Documents
32
Citations
110
h-index
7
This researcher does not have a WoS ID.
Scholarly Output
51
Articles
22
Views / Downloads
71815/17548
Supervised MSc Theses
11
Supervised PhD Theses
6
WoS Citation Count
95
Scopus Citation Count
110
Patents
0
Projects
4
WoS Citations per Publication
1.86
Scopus Citations per Publication
2.16
Open Access Source
40
Supervised Theses
17
| Journal | Count |
|---|---|
| Optics Communications | 4 |
| Journal of Lightwave Technology | 3 |
| Optical Fiber Technology | 2 |
| Optical and Quantum Electronics | 2 |
| 2016 National Conference on Electrical, Electronics and Biomedical Engineering, ELECO 2016 | 1 |
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51 results
Scholarly Output Search Results
Now showing 1 - 10 of 51
Master Thesis Reflection Properties of a Gaussian Laser Beam From Multilayer Dielectric Films(Izmir Institute of Technology, 2010) Şen, Taner; Dinleyici, Mehmet Salih; Dinleyici, Mehmet SalihA laser microphone is a surveillance device that uses a laser beam to detect sound vibrations in a distant object. The object is typically inside a room where a conversation is taking place, and can be anything that can vibrate (for example, picture or window) in response to the sound waves of the conversation. The object preferably has a smooth surface. The laser beam is directed into the room through a window, reflected off the object and returned to a receiver that converts the beam to audio signal. The beam is mostly bounced off the window itself. Usually these kinds of devices are used by surveillance intelligence in some parts of governments and these kinds of weapons analyze the laser beam which reflects from window. In this thesis a countermeasure to the detection of laser beam is analyzed. In order to make this possible, the reflection from dielectric stratified surfaces of a Gaussian laser beam needs to be described. The reflected beam profile of electromagnetic radiation exposes to various effects different from reflected plane waves. Gaussian beams which reflect from a dielectric slab experience in a shifting maximum point in one direction; lateral shift, focal shift and angular divergence are the shift and distortion of the beam profile. The Gaussian beam propagates in z direction and broadens in transverse plane, in two dimensions and is decomposed into plane wave components. Upon analyzing the reflection coefficient and beam profile, reduction of beam power after reflection from stratified films is described.Conference Object In Fiber Resonance Breaking Mechanism(Institute of Electrical and Electronics Engineers Inc., 2010) Akın, Osman; Dinleyici, Mehmet SalihIn this work we investigate mode resonance breaking mechanism in slab waveguide accomplished by cladding index modulation according to Kerr nonlinearity. The interaction is considered to be a Four Wave Mixing Process and Coupled Mode Theory is used to analyze the effect of cladding perturbation into propagating fundamental mode.Article Enhancing Thickness Determination of Nanoscale Dielectric Films in Phase Diffraction-Based Optical Characterization Systems With Radial Basis Function Neural Networks(IOP Publishing, 2023) Ataç, Enes; Karatay, Anıl; Dinleyici, Mehmet SalihAccurate determination of the optical properties of ultra-thin dielectric films is an essential and challenging task in optical fiber sensor systems. However, nanoscale thickness identification of these films may be laborious due to insufficient and protracted classical curve matching algorithms. Therefore, this experimental study presents an application of a radial basis function neural network in phase diffraction-based optical characterization systems to determine the thickness of nanoscale polymer films. The non-stationary measurement data with environmental and detector noise were subjected to a detailed analysis. The outcomes of this investigation are benchmarked against the linear discriminant analysis method and further verified by means of scanning electron microscopy. The results show that the neural network has reached a remarkable accuracy of 98% and 82.5%, respectively, in tests with simulation and experimental data. In this way, rapid and precise thickness estimation may be realized within the tolerance range of 25 nm, offering a significant improvement over conventional measurement techniques.Conference Object Citation - WoS: 1Citation - Scopus: 1Görgül kip ayrıştırması kullanılarak optik faz kırınımında hassasiyet iyileştirilmesi(IEEE, 2023) Ataç, Enes; Dinleyici, Mehmet SalihPhase diffraction is a potent property used in transparent dielectric film characterization. The measured diffraction pattern on the camera is evaluated by matching numerically computed diffraction patterns to determine the optical properties of the ultra-thin films (refractive index, thickness, etc.). However, the obtained diffraction data is not only a nonlinear and non-stationary signal but also exhibits micron-scale variations, thus limiting the measurement accuracy. Therefore, it is challenging to identify shifts in minima and deviations in amplitude on diffraction data to extract information about the optical properties of phase objects. In this study, it is aimed to improve the thickness sensitivity of the system by applying Empirical Mode Decomposition (EMD) to plane wave-based near-field phase diffraction data. Since EMD is very sensitive to abrupt changes in the signal due to the spatial frequency components, the nanoscale variations in the film thickness become more observable and detectable. Experimental outputs and numerical simulations show that the decomposition increases the thickness sensitivity comparing the classical matching technique.Article Citation - WoS: 8Citation - Scopus: 9Calculation of the Wavelength Filter Properties of the Fiber-Slab Waveguide Structure Using Vector Mode Expansion(Institute of Electrical and Electronics Engineers Inc., 1998) Dinleyici, Mehmet Salih; Patterson, David B.A vectorial solution technique is applied to investigate the dispersion characteristics of the ridge modes of a waveguide structure comprising a slab and optical fiber. The power transmission characteristics of the device with respect to wavelength are calculated under various device parameters, such as slab index and fiber-slab separation. We discuss the effects of such parameters on the bandwidth and rejection of the notch filter produced by this structure.Doctoral Thesis Photonic Crystal Based Spectral Filter Devices for Optical Communication(Izmir Institute of Technology, 2015) Karakılınç, Özgür Önder; Dinleyici, Mehmet Salih; Dinleyici, Mehmet SalihIt is already foreseen that future integrated photonic circuits for ultra fast alloptical signal processing will require various types of functional elements that include spectral managements. Consequently, dynamical manipulations of the photonic crystals play an important role in order to route the optical signal between waveguide channels or may be among layers. Hence, in this study, photonic crystal based spectral filters are proposed for all-optical communication applications. Firstly, grating structures composed with Gaussian beam interference equation and stimulated by nonlinearity phenomenon in photonic crystal are studied. The grating structure exhibiting special features on transmission characteristics are shown. After that, idea is expanded with applying a realistic Gaussian beam source, and transient grating in nonlinear photonic crystal structure is considered. At this point, light wave interaction with nonlinear response time plays a significant role on the signal manipulation. So, the behavior of pulse propagation in the medium having the response of instantaneous nonlinearity (Kerr) is summarized. As a second aspect of this work, the optical resonator, which is essential functional block for filtering, modulating, buffering, switching in integrated optical circuits systems, is presented. Photonic crystal microcavity based dual-mode dual-band bandpass filter is designed and its transmission characteristics are investigated for various configurations. Photonic crystal resonator structure is formed by a point defect microcavity that is constituted with a large and three smaller auxiliary perturbation rods. Degenerate modes at each band may also be excited by changing the structure properties of the perturbation. The proposed photonic crystal spectral filters structure can effectively be used for optical communication applications.Master Thesis A Novel Method of Routing in All-Optical Packet Switched Networks(Izmir Institute of Technology, 2002) Mocan, Bora; Dinleyici, Mehmet SalihIncreasing bandwidth demand, driven by Internet Protocol (IP), let the communication industry change to IP-centric networks. To satisfy the needs, optical fiber communication links provides a usable transmission bandwidth of 25,000,000 MHz. Despite the huge potential of the optical links, electronic-based networking devices (Router, switch, repeater, etc.) act as bottlenecks of the system because of the material limitations of the electronics. Optical networks appear to be the solution of choice for providing faster networking infrastructure that can meet the explosive growth of the Internet. This thesis will discuss architectures and technology issues for the design of a high performance all-optical router. In particular, it focuses on the concept of an optical router for packet switched computer networks as an edge network device, functioning as an interface between autonomous systems. A novel architecture will be proposed and simulated by means of special software. Implementation problems and the limitations of the architecture are discussed in detail component by component.Doctoral Thesis A Study on Entangled Photon Pairs in Graded-Index Optical Fibers(Izmir Institute of Technology, 2021) Ekici, Çağın; Dinleyici, Mehmet SalihQuantum optics offer new possibilities, new approaches, and potentially groundbreaking new technologies whose backbone is based on creation, manipulation, and detection of special quantum states of light. The main objective of the thesis is to present a study of spontaneously arisen heralded entangled photon-pairs which play crucial role in emerging quantum enhanced technologies. We have mainly investigated discrete transverse-spatial-mode entangled photon-pairs in waveguide, because it intrinsically offers infinite dimension. Entangled states of higher dimensional systems enable realization of quantum information schemes that can offer higher information density coding and show more error resilience than can be achieved with lower dimensional systems. In this context, we have exploited a graded-index optical fiber as photon-pair-generation platform via nonlinear intermodal-four-wave mixing (FWM), since the fiber may allow different FWM processes to overlap in spectral domain, resulting in an entangled pair of spatial qubits. We have also probed joint spectral properties of the generated photons to show capability of hyperentanglement in frequency and transverse mode. We have discussed spatial Wigner function and its realization to characterize spatial properties of the quantum state. We have shown that entanglement can be verified through a violation of the Clauser - Horne - Shimony - Holt (CHSH) inequality based on spatial Wigner function and coupled-mode theory. This thesis also includes basic analysis of transverse-mode entangled photon-pair distribution in a lossy-dispersive medium. Finally, the ways to follow and the quantities to measure are touched upon. Thus, we have explained the generation and four different detection schemes, relying on a combination of photon-number statistics, joint spectral properties, and spatial entanglement measurements.Article A Fiber-Integrated Optical Component Fabricated Via Photopolymerization: Mode-Selective Grating Coupler(Elsevier Ltd., 2013) Sümer, Can; Dinleyici, Mehmet SalihWe demonstrate a mode-selective directional coupler based on a grating structure, which is fabricated by laser direct-writing on a photopolymer thin film. The device is implemented on the flat planar surface of the D-Fiber, enabling fiber integration, where an Acrylamide/Polyvinyl Alcohol based photopolymer material is used in the fabrication of the device. While the refractive index modulation properties of the polymer material are well known, surface relief and corrugation properties due to photopolymerization are investigated in this study. Theoretical model of the device is presented together with the optimization and simulation results of the final device; experimental results have been found to be in good agreement with simulations.Article A Novel All-Optical Routing Architecture for Optical Packet Switched Networks(Springer Verlag, 2006) Mocan, Bora; Dinleyici, Mehmet SalihIncreasing bandwidth demand, mostly driven by the Internet Protocol (IP), has made researchers consider to deploy all-optical devices into packet switched networks. Despite huge bandwidth of the optical communication links (optical fiber) the usable capacity is limited due to bottlenecks (congestions) at the switching nodes. In this paper, a novel all-optical routing architecture is proposed for optical packet switched networks. In the design, practical optical devices (gratings, threshold elements, optical delays, and couplers) have been improved and exploited in order to integrate into an all-optical routing device. The system has been implemented and simulated by using an photonics simulation package (VPI-Virtual Photonics). The packets conveying a three-bit routing information tag at the bit rate of 10 Gbps have been successfully routed between two links. Some of the components are standard tools of the simulation package and some needed to be designed using the transfer function or theory developed in the literature. Noise and losses associated to the nonideal nature of the components are considered in the simulation as well.