排序方式: 共有46条查询结果,搜索用时 15 毫秒
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提出一种基于Jones矩阵的非线性偏振旋转锁模光纤激光器数值模型, 对偏振控制器波片方位角的描述具有物理意义清晰的优点. 数值仿真得到均方根宽度为0.28 ps的超短脉冲, 时域对称且振幅稳定. 搭建了非线性偏振旋转锁模光纤激光器, 系统可以自启动, 得到了重复频率为67.35 MHz的锁模脉冲输出. 数值仿真和实验结果都表明偏振控制器两个波片的方位角α1和α2都具有周期性, 周期分别为180°和90°. 由于随机双折射的影响, 实验测得的波片方位角调谐范围比数值仿真的结果小, 这一点通过在数值仿真模型中加入随机双折射的作用而得到证明. 相似文献
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Suppressing the mechanical quadrature error of a quartz double-H gyroscope through laser trimming 下载免费PDF全文
In this paper,we introduce a z-axis quartz gyroscope using a double-H tuning fork,which has a high sensitivity.However,it also causes a large mechanical quadrature error.The laser trimming method is used to suppress this error at quartz level.The trimming law is obtained through the finite element method(FEM).A femtosecond laser processing system is used to trim the gold balancing masses on the beams,and experimental results are basically consistent with the simulated ones.The mechanical quadrature error is suppressed by 96%,from 26.3°s-1 to 1.1°s-1.Nonlinearity changes from 1.48%to 0.30%,angular random walk(ARW)is reduced from 2.19°h-1/2 to 1.42°h-1/2,and bias instability is improved by a factor of 7.7,from 197.6°h-1 to 25.4°h-1. 相似文献
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