排序方式: 共有6条查询结果,搜索用时 12 毫秒
1
1.
Excess frequency noise induced by mechanical vibration is the dominant noise source at low Fourier frequencies in fiber-delay-line stabilized lasers. To resolve this problem, a double-winding fiber spool is designed and implemented that has ultralow acceleration sensitivity in all spatial directions. By carefully choosing the optimal geometry parameters of the fiber spool, we achieve acceleration sensitivity of 8 × 10~(-11)/g and 3 × 10~(-11)/g(g denotes the gravitational acceleration) in axial and radial directions, respectively. 相似文献
2.
3.
基于未来卫星间激光干涉任务的需求,介绍了一种基于迈克耳孙光纤干涉仪稳频的1064 nm激光稳频系统,该系统采用全光纤器件,结构紧凑、体积小、可靠性强。通过拍频测试,得到该系统的频率噪声在30 mHz~1 Hz范围内小于30 Hz/Hz1/2,频率稳定度在积分时间为1 s和1000 s时分别为1.2×10-14和3×10-13。该系统的性能满足LISA任务对稳频激光的需求,有望应用于未来的空间引力波探测任务。 相似文献
4.
本文以国内256家沪深制造类上市公司1997-2010年的年度财务数据为样本,利用Panel Data分析方法对国内制造业库存水平的变动趋势及关键影响因素进行了实证研究。结果发现制造企业库存水平与库存比重、毛利率、公司规模和提前期显著正相关,控制相关因素后修正库存水平逐年上升,库存周转居中企业的总资产报酬率低于库存周转较慢和较快的企业,与相关研究结论不一致。本文还分行业对这一问题展开了研究,其结论能为制造企业库存管理活动提供有益建议。 相似文献
5.
6.
We demonstrate the frequency stabilization of a 1.55 μm erbium-doped fiber laser by locking it to a 5-km-long optical fiber delay line(FDL). The stabilized laser is characterized via comparison with a second identical laser system. We obtain a fractional frequency stability of better than 3 × 10~(-15) over time scales of 1–10 s and a laser linewidth of 0.2 Hz, which is the narrowest linewidth of an FDL-stabilized laser observed to date. 相似文献
1