Acta Photonica Sinica, Volume. 41, Issue 7, 805(2012)

Turbulence Characteristics Optical Test Contrast

JING Wenbo*, ZHAO Si, FU Qiang, WANG Xiaoman, and JIANG Huilin
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    During the temperature difference of 10℃~230℃, three kinds of ShackHartman measuring methods are used to contrast atmospheric coherence length r0 with quadrant detector(QD), and ShackHartman(SH) and photomultiplier tube(PMT) respectively are applied to contrast refractive index structure parameter C2n with scintillation power spectrum. The experimental results show that: for r0 , the stability of QD decreases more obviously than SH when there is strong turbulence, and for three ShackHartman methods, DIMM overcomes problems such as device jitter but brings in problem of inconsistency in direction which wave front method can avoid; for C2n, SH is more precise than PMT which fitting correlation coefficient is up to 0.96; for scintillation power spectrum, the maximum frequency SH tested is 15 Hz higher than that of PMT when it is 200℃ influenced by noise; through the analysis of ShackHartman subaperture scintillation power spectrum, the scintillation power spectrum is not able to be measured precisely and different subapertures accomplish the measurement turbulence uniformity when the same subaperture incident intensity is not in the CCD response linear interval. The results will provide an optimal test method and theoretical basis for turbulence cell.

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    JING Wenbo, ZHAO Si, FU Qiang, WANG Xiaoman, JIANG Huilin. Turbulence Characteristics Optical Test Contrast[J]. Acta Photonica Sinica, 2012, 41(7): 805

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    Paper Information

    Received: Dec. 7, 2011

    Accepted: --

    Published Online: Aug. 31, 2012

    The Author Email: Wenbo JING (wenbojing@sina.com)

    DOI:10.3788/gzxb20124107.0805

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