Influence of optical fiber parameters on the measurement accuracy of fiber spectroscopy

Anzhi Wang; Jiabin Wang; Lingyu Jin; Zhaoxu Gan; Gang Yue; Yunxiang Yan; Shengjia Wang; Qi Yan; Tao Geng; Pengfei Wang; Shuang Chen; Weimin Sun

doi:10.1117/12.3019934

26 August 2024 Influence of optical fiber parameters on the measurement accuracy of fiber spectroscopy

Anzhi Wang, Jiabin Wang, Lingyu Jin, Zhaoxu Gan, Gang Yue, Yunxiang Yan, Shengjia Wang, Qi Yan, Tao Geng, Pengfei Wang, Shuang Chen, Weimin Sun

Author Affiliations +

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 131006B (2024) https://doi.org/10.1117/12.3019934
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Fiber spectroscopy technology is important in many areas of astronomical surveys. The fiber is used to transfer light from the telescope to the spectrograph. On the detector of the spectrograph, the image of fiber ends after dispersing can be obtained. In multi-mode fiber, multiple modes propagating in the fiber form a granular speckle pattern on the fiber end. In high-resolution spectral measurement, the speckle disturbs the energy distribution of the spot and reduces spectral resolution. The influence of fibers with different parameters on the centroid shift, signal-noise ratio, and radial power spectrum under artificial and mechanical disturbance is explored in this paper. The experimental results show that when the number of modes propagating in the fiber is higher, the precision of the centroid offset of the speckle is higher. Under the same disturbance condition, the speckle suppression effect is better with more mode numbers. This will be a reference for the parameter selection of optical fiber in the new instrument.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Anzhi Wang, Jiabin Wang, Lingyu Jin, Zhaoxu Gan, Gang Yue, Yunxiang Yan, Shengjia Wang, Qi Yan, Tao Geng, Pengfei Wang, Shuang Chen, and Weimin Sun "Influence of optical fiber parameters on the measurement accuracy of fiber spectroscopy", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 131006B (26 August 2024); https://doi.org/10.1117/12.3019934

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