Abstract
Due to the laser frequency fluctuation, the unequal arm-length of the laser interferometer will give rise to a significant phase noise. This laser frequency fluctuation noise dominates the current space-borne gravitational wave detection missions. To tackle this problem, a post data processing method called time delay interferometer was invented. This method was experimentally verified in the previous work with the scale of a few meters. By kilo-meter long optical fibers, an experimental verification of the time delay interferometer for Chinese space-borne gravitational wave detection mission was carried out in this work. The results showed that the laser frequency fluctuation noise could be suppressed by more than 6 orders in the frequency band from 1 mHz to 0.1 Hz.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
The work is supported by the “National Key Research and Development Program of China” (2020YFC2200104, 2021YFC2202902 and 2021YFC2201901).
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Xiaokang Li wrote the main manuscript. Heshan Liu performed the experiment and prepared the figures. Pengzhan Wu and Haosi Li performed the data analysis and provide constructive discussions. Peng Xu contributed significantly to analysis. Ziren Luo contributed to the conception of the study and manuscript preparation. All authors reviewed the manuscript.
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Li, X., Liu, H., Wu, P. et al. Proof-of-principle Experimental Demonstration of Time-delay-interferometry for Chinese Space-borne Gravitational Wave Detection Missions. Microgravity Sci. Technol. 34, 64 (2022). https://doi.org/10.1007/s12217-022-09982-z
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DOI: https://doi.org/10.1007/s12217-022-09982-z