Now showing items 1-11 of 11

    • Anamorphic fractional Fourier transform: optical implementation and applications 

      Mendlovic, D.; Bitran, Y.; Dorsch, R. G.; Ferreira, C.; Garcia, J.; Özaktaş, Haldun M. (Optical Society of America, 1995-11-10)
      An additional degree of freedom is introduced to fractional-Fourier-transform systems by use of anamorphic optics. A different fractional Fourier order along the orthogonal principal directions is performed. A laboratory ...
    • Compact optical temporal processors 

      Mendlovic, D.; Melamed, O.; Özaktaş, Haldun M. (Optical Society of America, 1995)
      Optical signal processing can be done with time-lens devices. A temporal processor based on chirp-z transformers is suggested. This configuration is more compact than a conventional 4-f temporal processor. On the basis of ...
    • Effect of fractional Fourier transformation on time-frequency distributions belonging to the Cohen class 

      Özaktaş, Haldun M.; Erkaya, N.; Kutay, M. A. (Institute of Electrical and Electronics Engineers, 1996-02)
      We consider the Cohen (1989) class of time-frequency distributions, which can be obtained from the Wigner distribution by convolving it with a kernel characterizing that distribution. We show that the time-frequency ...
    • Generalized filtering configurations with applications in digital and optical signal and image processing 

      Kutay, Mehmet Alper (Bilkent University, 1999)
      In this thesis, we first give a brief summary of the fractional Fourier transform which is the generalization of the ordinary Fourier transform, discuss its importance in optical and digital signal processing and its ...
    • Graphene-based optical modulators 

      Balci S.; Kocabas, C. (World Scientific Publishing Co. Pte. Ltd., 2017)
      In this chapter, we summarize the recent progress on graphene based optical modulators. Ability to control density of high mobility electrons on large area graphene surface enables realization of new type of electrooptical ...
    • Linear canonical transforms, degrees of freedom, and sampling in optical signals and systems 

      Özaktaş, Haldun M.; Öktem, F. S. (IEEE, 2014)
      We study the degrees of freedom of optical systems and signals based on space-frequency (phase-space) analysis. At the heart of this study is the relationship of the linear canonical transform domains to the space-frequency ...
    • Lyotropic liquid-crystalline mesophase of lithium triflate-nonionic surfactant as gel electrolyte for graphene optical modulator 

      Balci, F. M.; Balci, S.; Kocabas, C.; Dag, Ö. (American Chemical Society, 2017)
      Lithium salt (noncoordinating anions, such as lithium triflate (Ltf)) gel electrolytes may be key for the practical use of electrochemical devices. We introduce a new lyotropic liquid-crystalline (LLC) mesophase using Ltf, ...
    • Nanoantenna couplers for metal-insulator-metal waveguide interconnects 

      Onbasli, M.C.; Okyay, Ali Kemal (SPIE, 2010)
      State-of-the-art copper interconnects suffer from increasing spatial power dissipation due to chip downscaling and RC delays reducing operation bandwidth. Wide bandwidth, minimized Ohmic loss, deep sub-wavelength confinement ...
    • Optical information processing: A historical overview 

      Kutay, Mehmet Alper; Özaktaş, Haldun Memduh (Academic Press, 2021-12)
      Optical information processing lies at the intersection of optics and signal processing. It involves the processing of optical information as well as the use of optical means to process information, the later being the ...
    • Optical information processing: A historical overview 

      Özaktaş, Haldun Memduh; Kutay, Mehmet Alper (Academic Press, 2021-12)
      Optical information processing lies at the intersection of optics and signal processing. It involves the processing of optical information as well as the use of optical means to process information, the later being the ...
    • Preface 

      Healy, J. J.; Kutay, M. A.; Özaktaş, Haldun M.; Sheridan, J. T. (Springer, New York, 2016)