研究目的
Investigating the diffraction correction of the displacement measurement in a calculable capacitor using a locking Fabry-Perot interferometer based on Gaussian beam propagation.
研究成果
The interferometer model of the calculable capacitor is outlined initially, and the displacement correction versus the longitude propagation distance is also analyzed numerically. Refinements and comparisons of this mathematics model will be carefully checked in the future.
研究不足
The paper does not explicitly mention the limitations of the research.
1：Experimental Design and Method Selection:
A mathematical model of the locking interferometer based on Gaussian beam propagation is set up. The phase difference between the two cavities of interest is analyzed numerically.
2：Sample Selection and Data Sources:
The parameters of the locking Fabry-Perot interferometer model are listed, including laser beam waist, distances, focal lengths, cavity length, and reflectance.
3：List of Experimental Equipment and Materials:
Stabilized He-Ne laser, mode-matching lens, Fabry-Perot interferometer, photodiode.
4：Experimental Procedures and Operational Workflow:
The laser beam is injected into the Fabry-Perot interferometer through a mode-matching lens. The transmission of the interferometer is detected by a photodiode, and a feedback servo unit is employed to lock the cavity length of the interferometer.
5：Data Analysis Methods:
The displacement correction due to the diffraction phase shift as the cavity length variation is calculated numerically.
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