Optimal optical path difference of an asymmetric common-path coherent-dispersion spectrometer | |
Chen, Shasha5,6,7; Wei, Ruyi4,5,7; Xie, Zhengmao5; Wu, Yinhua3; Di, Lamei5,7; Wang, Feicheng5,7; Zhai, Yang1,2 | |
刊名 | Applied Optics |
2021-06-01 | |
卷号 | 60期号:16页码:4535-4543 |
ISSN号 | 1559128X; 21553165 |
DOI | 10.1364/AO.425491 |
产权排序 | 1 |
英文摘要 | Optical path difference (OPD) is a very significant parameter in the asymmetric common-path coherent-dispersion spectrometer (CODES), which directly determines the performance of the CODES. In order to improve the performance of the instrument as much as possible, a temperature-compensated optimal optical path difference (TOOPD) method is proposed. The method does not only consider the influence of temperature change on the OPD but also effectively solves the problem that the optimal OPD cannot be obtained simultaneously at different wavelengths. Taking the spectral line with a Gaussian-type power spectral density distribution as a representative, the relational expression between the OPD and the visibility of interference fringes formed by the CODES is derived for the stellar absorption/emission line. Further, the optimal OPD is deduced according to the efficiency function, and the relationship between the optimalOPDand wavelength is analyzed. Then, based on the materials' dispersion characteristics, different optical materials are combined and added to the interferometer's reflected and transmitted optical path to implement the optimalOPDat different wavelengths, thereby improving the detection precision. Meanwhile, the materials whose refractive index negatively changes with temperature are selected to reduce or even offset the temperature impact on OPD, and hence the system's stability is improved and further improves the detection precision. Under certain input conditions, the material combination that approximates the optimal OPD is performed within the range of 0.66-0.9 μm. The simulation results show that the maximal difference between the optimal OPD obtained by the efficiency function and the OPD produced by the material combination is 0.733 mm for the absorption line and 1.122 mm for the emission line, which is reduced by 1 time compared with only one material. The influence of temperature on the OPD can be reduced by 2-3 orders of magnitude by material combination, which greatly ameliorates the stability of the whole spectrometer. Hence, the TOOPD method provides a new idea for further improving the high-precision radial velocity detection of the asymmetric common-pathCODES. ©2021 Optical Society of America. |
语种 | 英语 |
出版者 | The Optical Society |
内容类型 | 期刊论文 |
源URL | [http://ir.opt.ac.cn/handle/181661/94824] |
专题 | 西安光学精密机械研究所_光学影像学习与分析中心 |
通讯作者 | Wei, Ruyi |
作者单位 | 1.Key Laboratory of Astronomical Optics and Technology, Nanjing Institute of Astronomical Optics and Technology, Chinese Academy of Sciences, Nanjing; 210042, China 2.National Astronomical Observatories/Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing; 210042, China; 3.School of Optoelectronics Engineering, Xi'an Technological University, Xi'an; 710021, China; 4.Electronic Information School, Wuhan University, Wuhan; 430072, China; 5.Xi'an Institute of Optics Precision and Mechanic of Chinese Academy of Sciences, Xi'an; 710119, China; 6.School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China; 7.CAS Key Laboratory of Spectral Imaging Technology, Xi'an; 710119, China; |
推荐引用方式 GB/T 7714 | Chen, Shasha,Wei, Ruyi,Xie, Zhengmao,et al. Optimal optical path difference of an asymmetric common-path coherent-dispersion spectrometer[J]. Applied Optics,2021,60(16):4535-4543. |
APA | Chen, Shasha.,Wei, Ruyi.,Xie, Zhengmao.,Wu, Yinhua.,Di, Lamei.,...&Zhai, Yang.(2021).Optimal optical path difference of an asymmetric common-path coherent-dispersion spectrometer.Applied Optics,60(16),4535-4543. |
MLA | Chen, Shasha,et al."Optimal optical path difference of an asymmetric common-path coherent-dispersion spectrometer".Applied Optics 60.16(2021):4535-4543. |
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