| 高分光比光纤零耦合器临界耦合特性的理论分析与实验论证 |
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| 引用本文： | 李佟,彭江得,刘小明,刘丹.高分光比光纤零耦合器临界耦合特性的理论分析与实验论证[J].中国激光,2001,28(8):757-760. |
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| 作者姓名： | 李佟 彭江得 刘小明 刘丹 |
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| 作者单位： | 清华大学电子工程系 |
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| 基金项目： | 国家自然科学基金 (项目号 :69782 0 0 3 )资助项目 |
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| 摘 要： | 对光纤失配非对称耦合器中的模式耦合特性进行了理论和实验研究 ,给出了两光纤失配量的临界判据r2 r1 =0 62～ 0 63 ,指出当失配度超过此下限后 ,因出现高阶模的耦合而降低分光比。合理控制失配量 ,研制出分光比为 5× 10 3～ 10 5,损耗为 0 1～ 0 .2dB的光纤零耦合器。
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| 关 键 词： | 零耦合器 光纤 失配 |
| 收稿时间： | 2000/5/9 |
Experimental and Theoretical Study on the Critical-coupling Characteristic of Fiber Null Coupler with High Splitting Ratio |
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| LI Tong,PENG Jiang,de,LIU Xiao,ming,LIU Dan.Experimental and Theoretical Study on the Critical-coupling Characteristic of Fiber Null Coupler with High Splitting Ratio[J].Chinese Journal of Lasers,2001,28(8):757-760. |
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| Authors: | LI Tong PENG Jiang de LIU Xiao ming LIU Dan |
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| Abstract: | The mode coupling characteristic in the asymmetrical coupler is studied theoretically and experimntally. The cirtical fiber mismatch criterion of r2/r1=0.62～0.63 is given. It is shown that when the fiber mismatch exceeds the limit, higher order mode coupling occurs and the splitting ratio decreases. By controlling the fiber mismatch properly, the fiber null coupler with splitting ratio of 5×10 3～10 5 and loss of 0.1～0.2 dB is made. |
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| Keywords: | null coupler fiber mismatch |
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