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A fiber bundle structure with uniform transmission characteristics for high-density astronomical optical cables
Yan Qi1; Geng Tao1; Jiang Hang1; Zhao Chuang1; Zhang YingHua1; Wang AnZhi1; Wang JiaBin1; Jin XiRen1; Chen XuDong1; Lu ChunLian1; Wang Liang2; Huang ZhiXin2; Zhuang JingDong2; Wang Song2; Sun WeiMin1; Cui XiangQun3
2019
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume19Issue:8
AbstractTransmission efficiency (TE) and focal ratio degradation (FRD) are two important parameters for evaluating the quality of an optical fiber system used for astronomy. Compared to TE, the focal ratio is more easily influenced by external factors, such as bending or stress. Optical cables are widely implemented for multi-object telescopes and integral field units (IFUs). The design and fabrication process of traditional optical cables seldom considers the requirements of astronomical applications. In this paper. we describe a fiber bundle structure as the basic unit for miniaturized high-density FASOT-IFU optical cables, instead of the micro-tube structure in stranded cables. Seven fibers with hexagonal arrangement were accurately positioned by ultraviolet (UV)-curing acrylate to form the bundle. The coating diameter of a fiber is 0.125 mm, and the outer diameter of the bundle is 0.58 mm. Compared with the 0.8 mm micro-tube structure of a traditional stranded cable, the outer diameter of the fiber bundle was reduced by 27.5%. Fiber paste was filled into the bundle to reduce stress between the fibers. We tested the output focal ratio (OFR) in 95% of the encircled energy (EE95) of the fibers in the bundle under different conditions. With the incident focal ratio F/8, the maximum difference of OFR is 0.6. In particular, when the incident focal ratio is F/5, the maximtun difference of OFR is only 0.1. The jacket formed by the UV-curing acrylate can withstand a certain stress of less than 1.38 N mm(-1). The fiber bundle can maintain uniform emitting characteristics with a bending radius of 7.5 an and with tension less than 6 N. The test results show that the structure of the fiber bundle can be used as a basic unit for miniaturized high-density astronomical optical cables.
Keywordinstrumentation: spectrographs techniques: imaging spectroscopy techniques: spectroscopic methods: miscellaneous
Language英语
Funding Project[National Natural Science Foundation of China (NSFC)] ; [Chinese Academy of Sciences] ; [NSFC] ; [Fundamental Research Funds for Central Universities]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/66843
Collection中国科学院国家天文台
Affiliation1.上海市地震局
2.Yangtze Opt Fibre & Cable Joint Stock Ltd Co, Wuhan 430073, Hubei, Peoples R China
3.中国科学院国家天文台
Recommended Citation
GB/T 7714
Yan Qi,Geng Tao,Jiang Hang,et al. A fiber bundle structure with uniform transmission characteristics for high-density astronomical optical cables[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2019,19(8).
APA Yan Qi.,Geng Tao.,Jiang Hang.,Zhao Chuang.,Zhang YingHua.,...&Cui XiangQun.(2019).A fiber bundle structure with uniform transmission characteristics for high-density astronomical optical cables.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,19(8).
MLA Yan Qi,et al."A fiber bundle structure with uniform transmission characteristics for high-density astronomical optical cables".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 19.8(2019).
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