Measurement of spot dancing for focused beam in atmosphere using position sensitive photomultiplier tube

Xiaoshan Ma; Wenyue Zhu; Ruizhong Rao

doi:10.1117/12.619508

12 May 2005 Measurement of spot dancing for focused beam in atmosphere using position sensitive photomultiplier tube

Xiaoshan Ma, Wenyue Zhu, Ruizhong Rao

Proceedings Volume 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies; (2005) https://doi.org/10.1117/12.619508
Event: Optical Technologies for Atmospheric, Ocean, and Environmental Studies, 2004, Beijing, China

Abstract

The spot dancing of the focused laser beam in the turbulent atmosphere was studied using a two dimensional position sensitive photomultiplier tube (PSPMT). The centroid position of the laser spot was evaluated by means of current-dividing center-of-gravity detection. The system has advantage over detector array system in spatial resolution and over the imaging system in dynamic range and sampling rate. Laser propagation experiments were carried out over 1000m path above the sea level and the fluctuations of laser intensity were measured simultaneously. The frequency spectra were calculated by fast Fourier tansform and the standard deviation of the spot dancing were analyzed.

Citation Download Citation

Xiaoshan Ma, Wenyue Zhu, and Ruizhong Rao "Measurement of spot dancing for focused beam in atmosphere using position sensitive photomultiplier tube", Proc. SPIE 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies, (12 May 2005); https://doi.org/10.1117/12.619508

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