Qiu Die, Tian Boyu, Ting He, Zhong Zheqiang, Zhang Bin
Appl Opt. 2021 Sep 20;60(27):8458-8465. doi: 10.1364/AO.438485.
A novel method, to the best of our knowledge, for mitigating thermal blooming by using the rotating beam when propagating in the atmosphere is proposed. The rotating beam, generated by coherent superposition of two vortex beams with opposite topological charges and frequency shift, can directly modulate the heat source in time and then mitigate the thermal blooming in the atmosphere. The theoretical model of the rotating beam propagating in the atmosphere has been established, and the thermal blooming effects of the rotating beam and the conventional nonrotating beam through the atmosphere have been analyzed and compared. Results indicate that, compared to the nonrotating beam propagating in the atmosphere, the rotating beam is less affected by the thermal blooming and exhibits outstanding performance in mitigating the thermal blooming effect, resulting in smaller beam expansion, less shift of the beam centroid position, and better beam quality than those of the nonrotating beam.
据我们所知，提出了一种在大气中传播时利用旋转光束减轻热晕效应的新方法。由具有相反拓扑电荷和频移的两束涡旋光束相干叠加产生的旋转光束，可以及时直接调制热源，进而减轻大气中的热晕效应。建立了旋转光束在大气中传播的理论模型，并对旋转光束和传统非旋转光束在大气中的热晕效应进行了分析和比较。结果表明，与在大气中传播的非旋转光束相比，旋转光束受热晕效应的影响较小，在减轻热晕效应方面表现出优异的性能，其光束扩展更小，光束质心位置偏移更小，光束质量优于非旋转光束。
