1. Articles from Imran B. Akca

    1-2 of 2
    1. On-chip Mach-Zehnder interferometer for OCT systems

      On-chip Mach-Zehnder interferometer for OCT systems

      By using integrated optics, it is possible to reduce the size and cost of a bulky optical coherence tomography (OCT) system. One of the OCT components that can be implemented on-chip is the interferometer. In this work, we present the design and characterization of a Mach-Zehnder interferometer consisting of the wavelength-independent splitters and an on-chip reference arm. The Si 3 N 4 was chosen as the material platform as it can provide low losses while keeping the device size small. The device was characterized by using a home-built swept source OCT system. A sensitivity value of 83 dB, an axial ...

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    2. Numerical model of optical coherence tomographic vibrography imaging to estimate corneal biomechanical properties

      Numerical model of optical coherence tomographic vibrography imaging to estimate corneal biomechanical properties

      Most techniques measuring corneal biomechanics in vivo are biased by side factors. We demonstrate the ability of optical coherence tomographic (OCT) vibrography to determine corneal material parameters, while reducing current prevalent restrictions of other techniques (such as intraocular pressure (IOP) and thickness dependency). Modal analysis was performed in a finite-element (FE) model to study the oscillation response in isolated thin corneal flaps/eye globes and to analyse the dependency of the frequency response function on: corneal elasticity, viscoelasticity, geometry (thickness and curvature), IOP and density. The model was verified experimentally in flaps from three bovine corneas and in two enucleated ...

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    1-2 of 2
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  2. Topics in the News

    1. (2 articles) B. Imran Akca
    2. (1 articles) Academic Medical Center at the University of Amsterdam
    3. (1 articles) Harvard University
    4. (1 articles) Massachusetts General Hospital
    5. (1 articles) Spanish National Research Council
    6. (1 articles) Ton G. van Leeuwen
    7. (1 articles) Susana Marcos
    8. (1 articles) Seok-Hyun Yun
    9. (1 articles) Ernest W. Chang
    10. (1 articles) Harvard University
    11. (1 articles) Massachusetts General Hospital
    12. (1 articles) University of North Carolina
    13. (1 articles) Baylor College of Medicine
    14. (1 articles) Masamichi Takano
    15. (1 articles) Joel S. Schuman
    16. (1 articles) Ik-Kyung Jang
    17. (1 articles) Yoshiyasu Minami
    18. (1 articles) Donald L. Budenz
    19. (1 articles) Gadi Wollstein
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