Volume 12 Issue 3
Jun.  2019
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GAO Rui-hong, LIU He-shan, LUO Zi-ren, JIN Gang. Introduction of laser pointing scheme in the Taiji program[J]. Chinese Optics, 2019, 12(3): 425-431. doi: 10.3788/CO.20191203.0425
Citation: GAO Rui-hong, LIU He-shan, LUO Zi-ren, JIN Gang. Introduction of laser pointing scheme in the Taiji program[J]. Chinese Optics, 2019, 12(3): 425-431. doi: 10.3788/CO.20191203.0425

Introduction of laser pointing scheme in the Taiji program

doi: 10.3788/CO.20191203.0425

the Strategic Priority Research Program(B) of the Chinese Academy of Science XDB23030000

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  • Corresponding author: LUO Zi-ren, E-mail:luoziren@imech.ac.cn
  • Received Date: 2018-06-29
  • Rev Recd Date: 2018-08-31
  • Publish Date: 2019-06-01
  • To realize scientific measurement of gravitational waves in the space gravitational wave detection, after launching into a predetermined orbit, the satellites must first construct a 100-km laser link. Furthermore, to prevent the gravitational wave signal from being flooded by laser pointing noise, the laser pointing stability must reach a magnitude of nrad/. Therefore, a sophisticated laser pointing scheme has to be adopted. In this paper, based on the Taiji program, we will discuss the design of such a scheme, which can be divided into two phases. Laser acquisition will be the first process. A star sensor(STR) and a charge coupled device(CCD) will be used as auxiliary capture detectors to decrease the laser pointing uncertainty region to sub-μrad levels. After that will be the laser fine pointing process, which uses differential wavefront sensitive(DWS) technology to accurately control pointing direction. The requirements of the acquisition sensors will be proposed based on the Taiji program while the feasibility of the DWS technique in the laser fine pointing phase will be discussed. The conclusions of this paper can be regarded as the basis and principle of related experiments and will give a reference for system construction in the laser pointing scheme of the Taiji program.
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