Effect of near-field distribution on transmission characteristics of fiber-fed Fabry-Perot etalons

分类： 天文学 >> 天文学 提交时间： 2023-02-19

Jun Hao Liang Tang Huiqi Ye Zhibo Hao Jian Han Yang Zhai Kai Zhang Ruyi Wei Dong Xiao

摘要： Fiber-fed etalons are widely employed in advanced interferometric instruments such as gravitational-wave detectors, ultrastable lasers and calibration reference for high-precision spectrographs. We demonstrate that variation in near-field distribution of the feeding fiber would deteriorate the spectrum precision of the fiber-fed Fabry-Perot etalon, especially when precision at the order of 3 * 10-10 or higher is required. The octagonal fiber reinforced with double scrambler could greatly improve the steadiness and uniformness of the near-field distribution. When building wavelength calibrators for sub-m s-1 precision radial-velocity instruments, the double scrambler should be considered meticulously.

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