Raman phase conjugate resonator for intracavity aero-optic turbulence aberration correction
| Autor: | Mark Cronin-Golomb, V. S. Sudarshanam, Philip R. Hemmer, M. S. Shahriar |
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| Rok vydání: | 1999 |
| Předmět: |
Physics
Zeeman effect business.industry Turbulence Phase (waves) Physics::Optics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials symbols.namesake Four-wave mixing Resonator Optics Flow velocity symbols Physics::Atomic Physics Electrical and Electronic Engineering Physical and Theoretical Chemistry business Phase conjugation Doppler effect |
| Zdroj: | Optics Communications. 160:283-288 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/s0030-4018(98)00679-8 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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