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分析讨论了复合抛物面型集光器与多模光纤的耦合效率和集光器设计之间的关系，提出了采用截底法和截顶法提高集光器与多模光纤耦合效率的方案。
The relationship between the coupling efficiency of composite parabolic concentrator and multimode fiber and the design of concentrator are analyzed and discussed. The scheme to improve the coupling efficiency of concentrator and multimode fiber by truncation and truncation is proposed.