首页|Single-shot phase retrieval for randomly fluctuated and obstructed vortex beams
Single-shot phase retrieval for randomly fluctuated and obstructed vortex beams
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Vortex beams with orbital angular momentum play a crucial role in increasing the information capacity in optical commu-nications.The magnitude of orbital angular momentum determines the ability of information encoding.In practice,a vortex beam can encounter random objects or turbulence during free-space propagation,resulting in information damage.Therefore,accurately measuring the orbital angular momentum of a randomly fluctuated and obstructed vortex beam is a considerable challenge.Herein,we propose a single-shot method for the phase retrieval of a randomly fluctuated and obstructed vortex beam by combining the phase-shift theorem and self-reference holography.Experimental results reveal that the sign and magnitude of the initial orbital angular momentum can be simultaneously determined based on their quantitative relation with the number of coherence singularities on the observation plane,thus addressing the effects of random occlusion and atmospheric turbulence.The proposed method considerably improved the accurate decoding of orbital angular momentum information in nonideal free-space optical communications.
School of Physical Science and Technology Soochow University,Suzhou 215006,China
School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China
Shandong Provincial Engineering and Technical Center of Light Manipulations,Shandong Provincial Key Laboratory of Optics and Photonic Device,School of Physics and Electronics,Shandong Normal University Jinan 250358,China
Joint Research Center of Light Manipulation Science and Photonic Integrated Chip of East China Normal University and Shandong Normal University,East China Normal University,Shanghai 200241,China
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国家重点研发计划国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金中国博士后科学基金江苏高校优势学科建设工程项目Key Lab of Modern Optical Technologies of Jiangsu Province
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