Raman phase conjugate resonator for intracavity aero-optic turbulence aberration correction

V. S. Sudarshanam*, M. Cronin-Golomb, P. R. Hemmer, M. S. Shahriar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


A cw degenerate phase conjugate resonator (PCR) with intracavity aero-optic turbulent flow is demonstrated using sodium vapor pumped with a low intensity cw laser. A turbulent helium jet at a high flow velocity of 250 m/s and forcing frequency of 18 kHz generated the spatio-temporal aberrations. The intracavity normalized peak-to-peak intensity fluctuations at 18 kHz measured with a pinhole-detector are ten times smaller in the corrected beam than in the aberrated beam. The threshold pump intensity for the resonator is ~4.5 W/cm2 in the absence of the turbulent flow. The pump frequency is tuned well within the Doppler width of the Na D1 transition. Evidence of a degenerate (laboratory frame) double-Λ mechanism involving Zeeman sublevels is also shown.

Original languageEnglish (US)
Pages (from-to)283-288
Number of pages6
JournalOptics Communications
Issue number4-6
StatePublished - Feb 15 1999


  • 42.50.Gy
  • 42.55.Ye
  • 42.60.Da
  • 42.65.-k
  • 42.65.Hw
  • Coherent population trapping
  • Degenerate four-wave mixing
  • Optical phase conjugation
  • Phase conjugate resonator
  • Turbulence aberration correction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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