| 飞秒激光制备波导型光合波器的数值模拟 |
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| 引用本文： | 刘彪,吴云峰,赵新才.飞秒激光制备波导型光合波器的数值模拟[J].激光技术,2012,36(2):251-254. |
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| 作者姓名： | 刘彪 吴云峰 赵新才 |
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| 作者单位： | 1.西安交通大学 电子信息与工程学院 西安 710049; |
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| 摘 要： | 为了对飞秒激光加工微纳米尺度波导器件的可行性进行分析,采用有限差分光束传输法对余弦型Y波导合波器的耦合夹角大小对合路光场的影响进行了仿真模拟,分析了光场强度、分支角度以及损耗等之间的关系,得到当耦合夹角为0.6rad时,输入光场相互隔离,附加损耗低至0.45dB,传输效率接近90%的结果。结果表明,在石英玻璃这种高损伤阈值的材料中利用飞秒激光直写制备光合波器件时,预先对加工的微纳器件进行仿真模拟,在微纳光子集成及微纳米光波导中具有很重要的意义。
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| 关 键 词： | 激光技术 飞秒激光加工 光合波器 光束传播法 数值模拟 |
| 收稿时间： | 2011/6/13 |
Research on wavelet selection in all fiber displacement interference speed measurement system |
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| LIU Biao
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WU Yun-feng
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ZHAO Xin-cai.Research on wavelet selection in all fiber displacement interference speed measurement system[J].Laser Technology,2012,36(2):251-254. |
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| Authors: | LIU Biao WU Yun-feng ZHAO Xin-cai |
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| Affiliation: | 1,2 (1.School of Optoelectronic Information,University of Electronic Science and Technology of China,Chengdu 610054,China;2.Institate of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,China) |
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| Abstract: | In order to make the all-fiber displacement interferometer system for any relector(AFDISAR)operate accurately and stably, based on wavelet analysis, the AFDISAR signal was analyzed theoretically and then six types of wavelet base functions were selected for computer simulation, and finally the optimal wavelet base appropriate for AFDISAR signal analysis was decided. At the same time, the accuracy of 99% and high stability of the system were verified in the free-fall motion experiment and the high-speed detonation experiment respectively. The results indicate that the selection of optimal wavelet base function is reasonable. |
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| Keywords: | laser technique optimal wavelet base computer simulation wavelet transformation signal processing |
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