9 August 2016 The fiber noise suppression of astro-comb fiber link system for Chinese 2.16m telescope
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Abstract
We built a fiber link system to connect the astronomical laser frequency combs (astro-comb) and the HRS spectrograph for Chinese 2.16m telescope in Xinglong. Fiber noise deteriorates the precision and stability of high spectral resolution fiber-fed spectrograph, especially when the astro-comb is used as calibrators. In order to optimize the performance of the astro-comb fiber link system, it is essential to suppress the fiber noise. The polygonal fiber is used to improve the scrambling and a vibrator attached to fiber is used to eliminate the speckle. The experiment results show good suppression of fiber noise with polygonal fiber, especially for the octagonal fiber, together with dynamic agitation by a vibrator.
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Huiqi Ye, Huiqi Ye, Jian Han, Jian Han, Yuanjie Wu, Yuanjie Wu, Dong Xiao, Dong Xiao, } "The fiber noise suppression of astro-comb fiber link system for Chinese 2.16m telescope", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99087E (9 August 2016); doi: 10.1117/12.2234106; https://doi.org/10.1117/12.2234106
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