A fiber bundle structure with uniform transmission characteristics for high-density astronomical opt

• 作 者: Qi Yan Tao Geng Hang Jiang Chu
• 机 构: KeyLabofIn-fiberIntegratedOptics,YangtzeOpticalFibreandCableJointStockLimitedCompany,NanjingInstitut
• 出 处: 天文和天体物理学研究:英文版
• 发表日期: 2019年8期
• 关键词: instrumentation:spectrographs techniques:imaging spectroscopy techniques:spectro
• 基金项目: funded by the Joint Research Fund in Astronomy under cooperative agreement between the National Natural Science Foundation of China(NSFC),the Chinese Academy of Sciences(Grant Nos.U1631239 and U183111

Transmission 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 bend