Haiyun Wang, Yakun Wang, Xiaofeng Peng, Lin Liu, Yangjian Cai, Fei Wang
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Real-time synthesis of twisted Gaussian Schell-model beams and their applications in suppressing the turbulence-induced scintillation and beam wander.
Twist phase is a unique degree of freedom in partially coherent optical fields, which produces photonic orbital angular momentum (OAM) similar to the vortex phase. In this Letter, we report a method for efficiently generating twisted Gaussian Schell-model (TGSM) beams using the Laguerre-Gauss (LG) mode decomposition via a digital micro-mirror device. By judiciously controlling the modal weight of each LG mode, we experimentally generate the high-quality TGSM beams in real time, only involving dozens of LG modes for superposition. Furthermore, experiments are carried out to investigate the intensity scintillation and beam wander behavior of the TGSM beams passing through atmospheric turbulence. We demonstrate for the first time, to our best of knowledge, that the twist phase can greatly reduce the turbulence-induced scintillation and beam wander. Our results show that the TGSM beam makes a 75% reduction of scintillation index compared to its counterpart without twist phase.
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The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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