| 光纤LP_(01)模远场发散角与归一化频率关系的研究 |
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| 引用本文： | 胡林顺,李连煌,郭福源. 光纤LP_(01)模远场发散角与归一化频率关系的研究[J]. 五邑大学学报(自然科学版), 2010, 24(2): 24-28 |
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| 作者姓名： | 胡林顺 李连煌 郭福源 |
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| 作者单位： | 1. 五邑大学,应用物理与材料学院,广东,江门,529020;福建师范大学,激光与光电子技术研究所,福建,福州,350007
2. 福建师范大学,激光与光电子技术研究所,福建,福州,350007 |
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| 基金项目： | 福建省科技厅F5类项目,福建省自然科学基金资助项目 |
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| 摘 要： | 根据折射率阶跃对称分布的光纤LP01模端面衍射远场的振幅分布,分析了衍射光束的半值全角宽度及振幅下降到1/e处对应的远场发散角全角各自随光纤归一化频率变化的关系;采用等效匹配效率法分析了远场发散角角半径,拟合出远场发散角角半径随归一化频率变化的函数表达式,并通过误差分析证明了拟合函数表达式的精确性.
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| 关 键 词： | 远场发散角 半值全角宽度 等效匹配效率法 相对误差 |
Research on the Relationship Between Divergence Angles of Fiber LP01 Mode and Normalized Frequency |
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| HU Lin-shun,LI Lian-huang,GUO Fu-yuan. Research on the Relationship Between Divergence Angles of Fiber LP01 Mode and Normalized Frequency[J]. Journal of Wuyi University(Natural Science Edition), 2010, 24(2): 24-28 |
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| Authors: | HU Lin-shun LI Lian-huang GUO Fu-yuan |
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| Affiliation: | 1.School of Applied Physics ＆ Materials Engineering,Wuyi University,Jiangmen 529020,China;2.Institute of Laser ＆ Optoelectronics Technology,Fujian Normal University,Fuzhou 350007,China) |
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| Abstract: | Based on the far-field diffraction amplitude distribution of fiber LP01 mode,the relationships between full angle at half maximum and the far-field divergence full angle of the amplitude drop to 1/e point with fiber normalized frequency are analyzed.The equivalent matching efficiency method is employed for the calculation of far-field divergence angle,and the function expression of the angle along with the fiber normalized frequency is fitted,and its accuracy is proved through error analysis. |
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| Keywords: | far field divergence angle full angle at half maximum equivalent matching efficiency method relative error |
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