Influence of turbulent atmosphere on laser beams from confocal unstable resonators

Yu-feng Peng; Juan Wang; Xiao-qun Bi; Ming-gao Zhang; Zu-hai Cheng

doi:10.1117/12.835022

28 August 2009 Influence of turbulent atmosphere on laser beams from confocal unstable resonators

Yu-feng Peng, Juan Wang, Xiao-qun Bi, Ming-gao Zhang, Zu-hai Cheng

Proceedings Volume 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging; 73822G (2009) https://doi.org/10.1117/12.835022
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

Based on the laser fields from a positive confocal unstable resonator (ab initio), the propagation characteristics of the beam through turbulent atmosphere are investigated by means of fast Fourier transform algorithm (FFT). To conveniently investigate the propagation characteristics of laser beam through the atmosphere, as far as known, in the previous many works, a mathematical expression was generally artificially predefined to represent the given laser beam, such as Gaussian beam, Hermite-cosh-Gaussian beam, flat topped beam, dark-hollow (annular) beam, etc. In this paper, by basing on the initial built in oscillation of a laser resonator, such as a positive confocal unstable resonator (CUR), we studied the intensity distributions of the output laser field to obtain the propagation characteristics of laser beam through the turbulent atmosphere as functions of different propagation distances. The results show that the turbulence will result in the degradation of the peak value of the laser intensity in the far field, the spread of the far field diagram patterns, and the beam quality characteristics greatly degraded.

Citation Download Citation

Yu-feng Peng, Juan Wang, Xiao-qun Bi, Ming-gao Zhang, and Zu-hai Cheng "Influence of turbulent atmosphere on laser beams from confocal unstable resonators", Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 73822G (28 August 2009); https://doi.org/10.1117/12.835022

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