• Inverse design of ultra-compact photonic gates for all-optical logic operations 

  Turduev, Mirbek; Kurt, Hamza; Neşeli, Berkay; Yilmaz, Yusuf Abdulaziz (IOP Publishing Ltd, 2022-05-26)

  Logic gates have great importance in realization of rapid data transmission as well as low loss transfers. In this paper, a multi-objective inverse-design approach is implemented by using objective-first algorithm to design ...
• Vehicle Swarm Platooning as Differential Game 

  Yıldız, Aykut; Jond, Hossein B. (Institute of Electrical and Electronics Engineers Inc., 2021-12-10)

  Platooning is the desired group driving behavior of connected and autonomous vehicles on roads. As a platoon, autonomous vehicles by synchronizing their speed, maintain shorter headway and inter-vehicle distance. Platooning ...
• Signal-to-noise ratio with adaptive optics compensation in non-Kolmogorov weak turbulent atmosphere 

  Gökçe, Muhsin Caner; Baykal, Yahya; Ata, Yalçın (TAYLOR & FRANCIS LTD2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND, 2021-07)

  This study investigates the average signal-to-noise ratio < SNR > at the shot-noise limited receiver of an optical wireless communication system (OWC) that uses collimated Gaussian beam with adaptive optics correction in ...
• Performance of M-ary pulse position modulated optical wireless communications systems in the marine atmosphere 

  Gökçe, Muhsin C.; Ata, Yalçın; Baykal, Yahya (OPTICAL SOC AMER2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036, 2021-03-10)

  The marine atmosphere exhibits different turbulence spectrum characteristics when compared to the turbulence spectra of the land atmosphere and underwater medium. The performance of M-ary pulse position modulated (PPM) ...
• Opinion dynamics of stubborn agents under the presence of a troll as differential game 

  Yıldız, Aykut; Özgüler, Bülent (Turkiye Klinikleri, 2021)

  The question of whether opinions of stubborn agents result in Nash equilibrium under the presence of troll is investigated in this study. The opinion dynamics is modelled as a differential game played by n agents during a ...
• Numerical and experimental demonstration of inverse designed low-index polarization-insensitive wavelength demultiplexer 

  Yıldırım, Bumin Kağan; Turduev, Mirbek; İçli, Abdullah Bera; Alpkılıç, Ahmet Mesut; Yılmaz, Yusuf Abdulaziz; Kurt, Hamza (IOP PUBLISHING LTDTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND, 2021-12-16)

  The computational inverse design has paved the way for the design of highly efficient, compact, and novel nanophotonic structures beyond human intuition and trial-and-error approaches. Apparently, with nanophotonic design ...
• Impact of Critical Node Failures on Lifetime of UWSNs with Incomplete Secure Connectivity 

  Yıldız, Hüseyin Uğur; Un, Burak Emre; Tavlı, Bülent (Institute of Electrical and Electronics Engineers Inc., 2021)

  Underwater wireless sensor networks (UWSNs) are, typically, comprised of sparsely deployed sensor nodes in hostile areas. Security of data flows among nodes are established by encryption of data packets, however, due to ...
• Effects of adaptive optics on bit error rate of M-ary PPM oceanic optical wireless communication systems with aperture averaging in strong turbulence 

  Gökçe, Muhsin Caner; Baykal, Yahya; Ata, Yalçın (IOP PUBLISHING LTDTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND, 2021-11)

  Scintillation is the result of oceanic turbulence reducing the bit error rate (BER) performance of oceanic optical wireless communication (OWC) systems. The scintillation, also known as intensity fluctuations, occurs due ...
• Dot-shaped 3d range-angle dependent beamforming with discular frequency diverse array 

  Akkoç, Ahmet Eren; Afacan, Erkan; Yazgan, Erdem (Institute of Electrical and Electronics Engineers Inc., 2021)

  A frequency diverse array (FDA) concept has drawn substantial attention in recent years because of its particular range-angle-dependent beam pattern. This interesting feature promises new opportunities and capabilities for ...
• Adaptive optics compensation of M-ary pulse position modulated communication systems in anisotropic non-Kolmogorov turbulent atmosphere 

  Gökçe, Muhsin Caner; Baykal, Yahya; Ata, Yalçın (ELSEVIERRADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS, 2021-12-15)

  Adaptive optics compensation effect on the performance of an optical wireless communication system (OWC) employing M-ary pulse position modulation (PPM) scheme in anisotropic non-Kolmogorov turbulent atmosphere is investigated. ...
• Ultra-compact, high-numerical-aperture achromatic multilevel diffractive lens via metaheuristic approach 

  Turduev, Mirbek; Kurt, Hamza; Yıldırım, Bumin Kağan (CHINESE LASER PRESS, 2021-10-01)

  Recently, multilevel diffractive lenses (MDLs) have attracted considerable attention, mainly due to their superior wave-focusing performance; however, efforts to reduce chromatic aberration are still ongoing. Here, we ...
• Joint optimization of target wake time mechanism and scheduling for IEEE 802.11ax 

  Karaca, Mehmet (TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2021)

  IEEE 802.11ax as the newest wireless local area networks (WLANs) standard brings enormous improvements in network throughput, coverage and energy efficiency in densely populated areas. Unlike previous IEEE 802.11 WLAN ...
• Laser array beam scintillation in oceanic turbulence 

  Gökçe, Muhsin Caner; Baykal, Yahya; Ata, Yalçın (IEEE, 2020-10)

  In this study, on-axis scintillation of laser array beam in oceanic turbulent medium is investigated. By using Rytov method, scintillation index variations are reported in connection with the propagation distance, rate of ...
• Effect of Adaptive Optics on Average Channel Capacity of Underwater Optical Wireless Communication System 

  Gökçe, Muhsin Caner (Institute of Electrical and Electronics Engineers Inc., 2020-10)

  The aberrations formed in the wavefront of a propagating laser due to oceanic turbulence result in optical scintillation which reduces the capacity of the underwater optical wireless communication (UOWC) channels. In this ...
• Adaptive Optics Effects on Average Channel Capacity of Oceanic Optical Wireless Communication Systems in Strong Turbulence 

  Gökçe, Muhsin Caner (Institute of Electrical and Electronics Engineers Inc., 2020-10)

  The adaptive optics technique is employed in oceanic optical wireless communication (OOWC) systems to correct wavefront deformations (or aberrations) caused by oceanic turbulence. This way, intensity fluctuations (i.e., ...
• Optical films based angular filters for microlasers 

  Turduev, Mirbek; Grineviciute, L.; Babayiğit, C.; Gailevicius, D.; Purlys, V.; Tolenis, T.; Kurt, H.; Staliunas, K. (IEEE, 2020)

  We propose a novel method of fabrication of Photonic Crystal Spatial Filters using a Vapor Deposition method on microstructured surfaces. Such spatial filters-layers of around 10 micron thickness, are very useful for ...
• Impact of Minimizing the Eavesdropping Risks on Lifetime of Underwater Acoustic Sensor Networks 

  Yıldız, Hüseyin Uğur; Özmen, Alper; Tavlı, Bülent (IEEE, 2020)

  Underwater Acoustic Sensor Networks (UASNs) are often deployed in hostile environments, and they face many security threats. Moreover, due to the harsh characteristics of the underwater environment, UASNs are vulnerable ...
• Adaptive optics effect on performance of BPSK-SIM oceanic optical wireless communication systems with aperture averaging in weak turbulence 

  Gökçe, Muhsin Caner; Baykal, Yahya; Ata, Yalçın (PERGAMON-ELSEVIER SCIENCE LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2020)

  Turbulence-induced wavefront deformations cause the irradiance of an optical signal to fluctuate resulting a in serious degradation in the bit-error-rate (BER) performance of optical wireless communication (OWC) system. ...
• Node-Level Error Control Strategies for Prolonging the Lifetime of Wireless Sensor Networks 

  Yıldız, Hüseyin Uğur; Tekin, Nazlı; Güngör, Vehbi Çağrı (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC445 HOES LANE, PISCATAWAY, NJ 08855-4141, 2021-07-01)

  In Wireless Sensor Networks (WSNs), energy-efficiency and reliability are two critical requirements for attaining a long-term stable communication performance. Using error control (EC) methods is a promising technique to ...
• Aperture Averaged Scintillation of Gaussian Beam in Strong Oceanic Turbulence 

  Gökçe, Muhsin Caner (GAZI UNIV, 2021)

  Oceanic turbulence caused by salinity and temperature fluctuations underwater affects the characteristics of a transmit laser beam resulting in turbulence-induced intensity fluctuations (i.e., scintillation) at the receiver. ...

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