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ICOP & ICPET 2015, 21 - : 1185-1188 Back to browse issues page
Generation and investigation of Non-Kolmogrov convective air turbulence by the measurement of phase power spectrum of light beam propagating through it
Ebrahim Mohammady Razi Mr. * 1, Saifollah Rasouli Dr.
Abstract:   (1698 Views)
Recently, a novel set-up based on moiré technique in conjunction with use of two telescopes have presented by the authors for investigation of turbulent media. In this work, by use of a telescope a plane wave is produced and propagates through a convective air turbulence medium. A flat plane heater with an upper surface area of 50×100 cm2 is used to produce temperature gradients (TG). The heater’s temperature is controlled from room temperature to 200oC. At the end of the turbulent medium, the second telescope and a two-channel moiré based wave front sensor have been installed. Analyzing the data of the wave front sensor, the aberrated wave front was reconstructed. Then using phase covariance function measurement, power spectrum was calculated in two directions. By comparing the phase power spectrum with the Kolmogrov model we show that the convective air turbulence is Non-Kolmogrov. Also, the effect of TG on power spectrum was investigated
Keywords: turbulence, convection, Wave front sensing, Temperature gradient, phase power spectrum
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Type of Study: Research | Subject: Special
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Mohammady Razi E, Rasouli S. Generation and investigation of Non-Kolmogrov convective air turbulence by the measurement of phase power spectrum of light beam propagating through it. ICOP & ICPET. 2015; 21 :1185-1188
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Volume 21 - Back to browse issues page
انجمن اپتیک و فوتونیک ایران Optics and Photonics Society of Iran
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