宇宙ベース重力波検出で中国研究チームが突破口 (Chinese Research Team Makes Breakthrough in Space-based Gravitational Wave Detection)

2026-05-11 中国科学院（CAS）

＜関連情報＞

• https://english.cas.cn/newsroom/cas-in-media/202605/t20260511_1159107.shtml
• https://spj.science.org/doi/10.34133/research.1252

太地宇宙重力波検出用レーザー干渉計の最近の開発状況 Recent Development of the Laser Interferometer for Taiji Space Gravitational Wave Detection

Heshan Liu, Juan Wang, Wei Tao, Keqi Qi, […] , and Wenrui Hu
Research  Published:16 Apr 2026
DOI:https://doi.org/10.34133/research.1252

Abstract

In this study, we have designed a full-function interferometer OB (optical bench) for the Taiji program and, for the first time, provided detailed parameter specifications for its interferometer system. Additionally, we constructed a first-generation Taiji interferometer OB and ground test system and conducted preliminary testing and calibration. A comprehensive analysis was carried out on the various noise sources impacting the interferometer system, including laser frequency noise, laser power noise, thermal drift noise, and angular jitter noise. The results revealed that the noise level of the interferometer system reached 1.1 pm/Hz^1/2 at 1 Hz, 5 pm/Hz^1/2 at 0.1 Hz, and 8 pm/Hz^1/2 at 0.01 Hz; these levels satisfied the requirements of the Taiji-2 mission. This work marks the first step in transitioning the Taiji program’s interferometer system from a principle prototype to an engineering prototype, playing a critical role in its future development.