| Low-frequency fluctuation in multimode semiconductor laser subject to optical feedback |
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| 作者姓名： | 张旭 叶会英 宋兆欣 |
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| 作者单位： | Information Engineering College of Zhengzhou University，Information Engineering College of Zhengzhou University，Information Engineering College of Zhengzhou University Zhengzhou 450052，Zhengzhou 450052，Zhengzhou 450052 |
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| 基金项目： | the National Natural Science Foundation of China under Grant No.60574098 |
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| 摘 要： | Dynamics of a semiconductor laser subject to moderate optical feedback operating in the low-frequency fluctuation regime is numerically investigated.Multimode Lang-Kobayashi(LK)equations show that the low-frequency intensity dropout including the total intensity and sub-modes intensity is accompanied by sudden dropout simultaneously,which is in good agreement with experimental observation.The power fluctuation is quite annoying in practical applications,therefore it becomes important to study the mech- anism of power fluctuation.It is also shown that many factors,such as spontaneous emission noise and feedback parameter,may influence power fluctuation larger than previously expected.
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