Abstract
In this paper, a theoretical analysis of how the excitation conditions affect the sapphire fiber Fabry-Perot interferometer (SFPI) visibility was performed. The conditions were considered, in which an SFPI was excited by a single-mode fiber (SMF), a multimode fiber (MMF), and a fiber collimator. The finite difference method (FDM) was used to realize the numerical solution of the modal electric fields, and then, the modal excited distributions in the sapphire fiber and the SFPI visibility were calculated. The results showed that different numbers of modes were excited in sapphire fibers under different excitation conditions and finally affected the fringe visibility of the SFPI. The fiber collimator excited the fewest modes and the visibility remained at the highest level. Finally, an experiment was performed, and the experimental results agreed well with the theoretical results.
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This work is supported by the National Natural Science Foundation of China (Grant Nos. 62025505 and 62061136002).
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Conflict of Interest Minghong YANG is an editorial board member for Photonic Sensors and was not involved in the editorial review, or the decision to publish this article. All authors declare that there are no competing interests.
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Zhang, J., Tang, R., Zhang, D. et al. Analysis of the Sapphire Fiber Fabry-Perot Interferometer Fringe Visibility under Different Excitation Conditions. Photonic Sens 14, 240305 (2024). https://doi.org/10.1007/s13320-024-0700-x
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DOI: https://doi.org/10.1007/s13320-024-0700-x