Simulation of pressure induced length change of an optical cavity used for optical pressure standard
Simulation of pressure induced length change of an optical cavity used for optical pressure standard
复制标题
用于光学压力标准的光学腔的压力引起的长度变化的模拟
DOI：
10.1088/1742-6596/1065/16/162003
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Tom Rubin
中科院分区：
文献类型：
--
作者：
Yuanchao Yang;Tom Rubin
中国计量科学研究院（NIM）为光学压力标准项目建造了一个双光腔。通过有限元分析（FEA）模拟研究了压力引起的弹性变形。畸变系数，即单位压力下的长度变化分数，测量通道的计算值为（9.936 ± 0.014）×10−12/Pa，参考通道的计算值为（1.49 ± 1.54）×10−11/Pa。重力引起的变形也被建模，以评估对低频振动的敏感性。腔体被建模为对称地支撑在四个点上。通过优化支撑位置，在633 nm处对垂直加速度的灵敏度降低到19 kHz/（m/s2）。
The National Institute of Metrology (NIM) has constructed a dual optical cavity for the optical pressure standard project. The elastic deformation induced by pressure is investigated by finite element analysis (FEA) simulation. The distortion coefficient, fractional length change per unit pressure, is calculated to be (9.936 ± 0.014)×10−12/Pa for the measurement channel and (1.49 ∼ 1.54)×10−11/Pa for the reference channel. The gravity-induced deformation is also modelled to evaluate the sensitivity to the low-frequency vibration. The cavity is modelled to be supported symmetrically on four points. With optimized support position, the sensitivity to vertical acceleration reduces to 19 kHz/(m/s2) at 633 nm.