Chinese Journal of Quantum Electronics, Volume. 41, Issue 4, 649(2024)

Background noise analysis of laser interferometer for test of TDI technology on ground

ZUO Lingyun, SHI Haosen, YAO Yuan, JIANG Yanyi, and MA Longsheng
Author Affiliations
  • State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China
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    For space gravitational wave detection, as the lengths of laser interferometer arms are not matched, the laser frequency noise cannot be eliminated in common mode, leading to the weak interfering signals being submerged in large residual laser frequency noise. By time-shifting and linearly combining independent interfering signals, laser frequency noise can be greatly eliminated as laser interferometry with virtual equal interferometer arm lengths. Such a technique is called time delay interferometry (TDI). In order to experimentally validate that TDI technique can reduce the influence of laser frequency noise on gravitational wave detection to 3 × 10-7 Hz/Hz at Fourier frequency of 1 mHz on the ground, it is necessary to analyze the main frequency noise sources of laser interferometer. Based on experimental measurement and calculation analysis, experimental parameters of the laser interferometer are derived to meet the noise requirement of gravitational wave detection, including the maximum length difference between interferometer arms, laser frequency stability, air pressure stability, laser power stability and temperature stability of experimental setups.

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    Lingyun ZUO, Haosen SHI, Yuan YAO, Yanyi JIANG, Longsheng MA. Background noise analysis of laser interferometer for test of TDI technology on ground[J]. Chinese Journal of Quantum Electronics, 2024, 41(4): 649

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    Paper Information

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    Received: May. 20, 2022

    Accepted: --

    Published Online: Jan. 8, 2025

    The Author Email:

    DOI:10.3969/j.issn.1007-5461.2024.04.009

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