NAOC Open IR
Optimal optical path difference of an asymmetric common-path coherent-dispersion spectrometer
Chen, Shasha1,2,3; Wei, Ruyi1,3,4; Xie, Zhengmao3; Wu, Yinhua5; Di, Lamei1,3; Wang, Feicheng1,3; Zhai, Yang6,7
2021-06-01
Source PublicationAPPLIED OPTICS
ISSN1559-128X
Volume60Issue:16Pages:4535-4543
AbstractOptical 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 optimal OPD and 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 optimal OPD at 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 mu m. 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-path CODES. (C) 2021 Optical Society of America
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Shaanxi Science and Technology Project ; Shaanxi Science and Technology Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shaanxi Science and Technology Project ; Shaanxi Science and Technology Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shaanxi Science and Technology Project ; Shaanxi Science and Technology Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shaanxi Science and Technology Project ; Shaanxi Science and Technology Project
DOI10.1364/AO.425491
WOS KeywordHIGH-RESOLUTION SPECTROGRAPH ; FIXED-DELAY INTERFEROMETRY ; PLANETS ; PRECISION ; SEARCH ; HARPS
Language英语
Funding ProjectNational Natural Science Foundation of China[11573058] ; National Natural Science Foundation of China[11727806] ; National Natural Science Foundation of China[11973066] ; Shaanxi Science and Technology Project[2021JQ-640]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Shaanxi Science and Technology Project ; Shaanxi Science and Technology Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shaanxi Science and Technology Project ; Shaanxi Science and Technology Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shaanxi Science and Technology Project ; Shaanxi Science and Technology Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shaanxi Science and Technology Project ; Shaanxi Science and Technology Project
WOS Research AreaOptics
WOS SubjectOptics
WOS IDWOS:000658194300005
PublisherOPTICAL SOC AMER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/77311
Collection中国科学院国家天文台
Corresponding AuthorWei, Ruyi
Affiliation1.CAS Key Lab Spectral Imaging Technol, Xian 710119, Peoples R China
2.Univ Chinese Acad Sci, Sch Optoelect, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Xian Inst Opt Precis & Mechan, Xian 710119, Peoples R China
4.Wuhan Univ, Elect Informat Sch, Wuhan 430072, Peoples R China
5.Xian Technol Univ, Sch Optoelect Engn, Xian 710021, Peoples R China
6.Chinese Acad Sci, Natl Astron Observ, Nanjing Inst Astron Opt & Technol, Nanjing 210042, Peoples R China
7.Chinese Acad Sci, Nanjing Inst Astron Opt & Technol, Key Lab Astron Opt & Technol, Nanjing 210042, Peoples R China
Recommended Citation
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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