研究目的
Investigating the performance of Free Space Optical Communication based on Orbital Angular Momentum with pointing errors, specifically the spiral spectrum spread of the Laguerre-Gaussian beam under receiver misalignment.
研究成果
The study concludes that alignment errors significantly affect the performance of OAM-based free-space optical communication systems, with both lateral displacement and angular tilt errors leading to increased bit-error rates and reduced channel capacity. The findings highlight the importance of precise alignment in such systems.
研究不足
The study focuses on theoretical analysis and simulation, with potential limitations in practical application due to simplifications in modeling atmospheric turbulence and alignment errors.
1：Experimental Design and Method Selection:
The study uses mathematical derivation and simulation to analyze the spiral spectrum spread of the Laguerre-Gaussian beam under alignment errors.
2：Sample Selection and Data Sources:
The analysis is based on theoretical models of the Laguerre-Gaussian beam and its propagation in free space with misalignment errors.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned.
4：Experimental Procedures and Operational Workflow:
The study involves deriving analytical expressions for the spiral spectrum under lateral displacement and angular tilt errors, followed by numerical simulation to analyze bit-error rate and channel capacity.
5：Data Analysis Methods:
Numerical simulation is used to analyze the effects of misalignment on communication performance.
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