Imaging Michelson interferometer for a low-density gas jet characterization
Imaging Michelson interferometer for a low-density gas jet characterization
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DOI：
10.1063/1.5098084
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发表时间：
2019-06-01
影响因子：
1.6
通讯作者：
Chaulagain, U.
中科院分区：
文献类型：
--
作者：
Nejdl, J.;Vancura, J.;Chaulagain, U.
提出了一种新的用于低密度气体射流特性分析的具有增加的干涉灵敏度的光学探测方法。所提出的技术采用具有自成像物体臂的迈克尔逊干涉仪，其使得物体能够在其自身上中继成像，并且以这种方式，通过物体激光束通过气体射流的双重传播来增加设备的相位灵敏度。选择405 nm的波长以通过增加探测波数来进一步增加灵敏度。一个低密度的氩气射流与不同的背压，其特征在于我们的方法和常用的马赫-曾德尔干涉仪设置显示预期的两倍增加的信号噪声比在双通配置。
A new optical probing method with increased interferometric sensitivity for a low-density gas jet characterization is presented. The proposed technique employs a Michelson interferometer with a self-imaging object arm, which enables the relay imaging of the object on itself, and in this way, the phase sensitivity of the device is increased by a double propagation of the object laser beam through the gas jet. The wavelength of 405 nm was chosen to further increase the sensitivity by increasing the probe wavenumber. A low-density argon gas jet with various backing pressures was characterized by our method and by a commonly used Mach-Zehnder interferometer setup showing the expected twofold increase in the signal to noise ratio in the double pass configuration.