Research Interests

​My research interest lies in the development of advanced optical diagnostic techniques for engineering applications. More specifically, my research involves implementation of optical and spectroscopic techniques such as tunable diode laser absorption spectroscopy (TDLAS), filtered Rayleigh scattering (FRS), Raman spectroscopy, two-color ratio pyrometry etc. for conducting quantitative measurements in high speed air flows, plasmas or/and combustion. These measurements help to develop a better understanding of the underlying physics of these applications. While my current research is interdisciplinary and applied in nature, I am also interested in studying fundamental problems in optics and photonics.

Selected Publications

  • Mole fraction measurement through a transparent quarl burner using filtered rayleigh scattering
    Y. Krishna, A.M. Elbaz, Y. Yue, and G. Magnotti
    Applied Optics 58 (20), 5575-5586, (2019)
  • Time-resolved temperature characterization of a hypersonic shock layer using a single high-speed color camera for a...
    S. Deep, Y. Krishna, and G. Jagadeesh
    Measurement Science and Technology 30, 095301, (2019)
  • High-speed Rayleigh-Raman measurements with subframe burst gating
    Y. Krishna, H. Tang, A. M. Elbaz, and G. Magnotti
    Optics Letters, , Vol: 44, No: 17, 2019, Pages 4091-4094, (2019)
  • Detection of Spatial Variation in Hypersonic Nozzle Flow Using Diode Laser Spectroscopy
    Y. Krishna, S. L. Sheehe, and S. O’Byrne
    AIAA Journal, (2018)
  • Effect of noise-induced wavelength fluctuation in tunable diode lasers on narrow-linewidth absorption measurements
    Y. Krishna, S. O’Byrne, M. Kannan, and G. Jagadeesh
    Applied Optics, (2018)
  • Temperature characterization of a radiating gas layer using digital-single-lens-reflexcamera-based two-color ratio ...
    S. Deep, Y. Krishna, and G. Jagadeesh
    Applied Optics, (2017)
  • Rugged, scramjet inlet temperature and velocity sensor: design and ground test
    J. Kurtz, M. Aizengendler, Y. Krishna, P. Walsh, S. O’Byrne
    AIAA Journal, Vol: 54, Issue 2, 399-407 , (2016 )
  • Subsonic in-flight temperature and pressure measurements using a scramjet inlet flow sensor
    J. Kurtz , M. Aizengendler, Y. Krishna, P. Walsh, S. O’Byrne
    AIAA Journal, Vol: 54, Issue 3, 1007-1013 , (2016)
  • Numerically determining mach number and orientation in hypersonic inlets using absorption spectroscopy
    Y. Krishna, S. O’Byrne, S. Wittig, J. Kurtz
    Journal of propulsion and power, Vol: 31, Issue 1, 123-132 , (2015 )
  • Baseline correction for stray light in log-ratio diode laser absorption measurements”
    Y. Krishna, S. O’Byrne, J. Kurtz
    Applied Optics, Vol: 53, Issue 19, 4128-4135 , (2014 )

Education Profile

  • ​Ph.D., Aerospace Engineering, University of New South Wales, Australia, 2015
  • M.Sc., (5-year integrated), Photonics, Cochin University of Science and Technology, India, 2010

Professional Profile

  • ​2017-Present: Postdoctoral fellow, KAUST, Thuwal, Saudi Arabia
  • 2016-2017: Postdoctoral fellow, Indian Institute of Science, Bangalore, India​

KAUST Affiliations

​Clean Combustion Research Center (CCRC)

International Affiliations