Principle demonstration of the phase locking based on the electro-optic modulator for Taiji space gravitational wave detection pathfinder mission

Liu, Heshan; Dong, Yuhui; Gao, Ruihong; Luo, Ziren; Jin, Gang

doi:10.1117/1.oe.57.5.054113

Cited by 8 publications

(5 citation statements)

References 29 publications

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“…Space-based GW detection is complementary to ground-based detection within the frequency band of 0.1 mHz~1 Hz. The international space gravitational wave detection programs mainly include LISA [ 2 ], DECIGO [ 3 ], the Taiji project [ 4 ], and the TianQin project [ 5 ]. The TianQin project, proposed by Chinese researchers, aims to launch a space-based gravitational wave observatory around 2035 [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Study on TPD Phasemeter to Suppress Low-Frequency Amplitude Fluctuation and Improve Fast-Acquiring Range for GW Detection

Ming,

Zhang,

Duan

et al. 2024

Sensors

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A phasemeter as a readout system for the inter-satellite laser interferometer in a space-borne gravitational wave detector requires not only high accuracy but also insensitivity to amplitude fluctuations and a large fast-acquiring range. The traditional sinusoidal characteristic phase detector (SPD) phasemeter has the advantages of a simple structure and easy realization. However, the output of an SPD is coupled to the amplitude of the input signal and has only a limited phase-detection range due to the boundedness of the sinusoidal function. This leads to the performance deterioration of amplitude noise suppression, fast-acquiring range, and loop stability. To overcome the above shortcomings, we propose a phasemeter based on a tangent phase detector (TPD). The characteristics of the SPD and TPD phasemeters are theoretically analyzed, and a fixed-point simulation is further carried out for verification. The simulation results show that the TPD phasemeter tracks the phase information well and, at the same time, suppresses the amplitude fluctuation to the noise floor of 1 μrad/Hz1/2, which meets the requirements of GW detection. In addition, the maximum lockable step frequency of the TPD phasemeter is almost three times larger than the SPD phasemeter, indicating a greater fast-acquiring range.

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Section: Introductionmentioning

confidence: 99%

Study on TPD Phasemeter to Suppress Low-Frequency Amplitude Fluctuation and Improve Fast-Acquiring Range for GW Detection

Ming,

Zhang,

Duan

et al. 2024

Sensors

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“…The Taiji program, with its three-step road map, has received priority support from the CAS's strategic priority research program since 2016 for its pre-experimental study. Some key technologies have been developed further in the studies [12,[14][15][16][17][18][19]. Currently, the first phase of the Taiji-1 on-orbit experiment has been successfully completed [20,21].…”

Section: Introductionmentioning

confidence: 99%

Taiji Data Challenge for Exploring Gravitational Wave Universe

Ren¹,

Zhao²,

Cao³

et al. 2023

Preprint

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The direct observation of gravitational waves (GWs) opens a new window for exploring new physics from quanta to cosmos and provides a new tool for probing the evolution of universe. GWs detection in space covers a broad spectrum ranging over more than four orders of magnitude and enables us to study rich physical and astronomical phenomena. Taiji is a proposed space-based gravitational wave (GW) detection mission that will be launched in the 2030s. Taiji will be exposed to numerous overlapping and persistent GW signals buried in the foreground and background, posing various data analysis challenges. In order to empower potential scientific discoveries, the Mock Laser Interferometer Space Antenna (LISA) Data Challenge and the LISA Data Challenge (LDC) were developed. While LDC provides a baseline framework, the first LDC needs to be updated with more realistic simulations and adjusted detector responses for Taiji's constellation. In this paper, we review the scientific objectives and the roadmap for Taiji, as well as the technical difficulties in data analysis and the data generation strategy, and present the associated data challenges. In contrast to LDC, we utilize second-order Keplerian orbit and second-generation time delay interferometry techniques. Additionally, we employ a new model for the extreme-mass-ratio inspiral waveform and stochastic GW background spectrum, which enables us to test general relativity and measure the non-Gaussianity of curvature perturbations. As the first data challenge for Taiji, we aim to build an open ground for data analysis related to Taiji sources and sciences. More details can be found on the official website http://taiji-tdc.ictp-ap.org.

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“…In 2008, led by the Institute of Mechanics of the Chinese Academy of Sciences, numerous domestic units set up space gravitational wave detection and demonstration group and conducted substantial research work with the support of the pilot science and technology special space science pre-research project of the Chinese Academy of Sciences. Scientific goals, development routes, program planning, and key technical breakthroughs were proposed, and the Space Taiji Program was introduced in early 2016 [14], [15]. According to the plan, China will launch a gravitational wave detection satellite group around 2030 to conduct direct detection of gravitational waves in the middle and low-frequency bands.…”

Section: Introductionmentioning

confidence: 99%

Capacitive Sensing and Electrostatic Control System Design and Analysis With a Torsion Pendulum

Wang

et al. 2020

IEEE Access

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The micro capacitive sensing and electrostatic drive control system (front-end electronics, FEE) is the core component of inertial sensor in space gravitational wave detection. The FEE requires high-precision displacement detection, high-stability electrostatic drive, and stable system control to achieve an acceleration resolution of 10 −15 m/s 2 /Hz 1/2 in the low-frequency range of 0.1 mHz-1 Hz. Based on the requirements of the future Chinese space gravitational wave detection task (Taiji Program), this paper conducted key technical research of the FEE using differential capacitance detections and electrostatic drives. The structure and working principle of the FEE were also introduced. The structural parameters of the entire system, working parameters, and electrostatic control system model were provided, and the performance of the PID controller was analyzed. Finally, using the torsion pendulum to overcome the influence of gravity on the earth, the FEE multi-degree of freedom control function was verified on the vibration isolation marble platform, the measurement range and power conversion coefficient were calibrated, and the noise level under current conditions was measured. Experimental results show that the FEE developed in this paper can achieve stable control in multiple degrees of freedom, the acceleration range is larger than 10 −3 m/s 2 , the electric force conversion factor is 4.8 × 10 −3 m/s 2 /V, and the measured acceleration resolution is 9.6 × 10 −6 m/s 2 /Hz 1/2 . After optimizing the sensitive structure parameters, the acceleration resolution can be estimated at 3.3 × 10 −15 m/s 2 /Hz 1/2 . These results satisfy the Taiji Program requirements. This paper provides a solid foundation for the future exploration of space gravitational waves in China and clears the optimization direction for the next step.

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Principle demonstration of the phase locking based on the electro-optic modulator for Taiji space gravitational wave detection pathfinder mission

Cited by 8 publications

References 29 publications

Study on TPD Phasemeter to Suppress Low-Frequency Amplitude Fluctuation and Improve Fast-Acquiring Range for GW Detection

Study on TPD Phasemeter to Suppress Low-Frequency Amplitude Fluctuation and Improve Fast-Acquiring Range for GW Detection

Taiji Data Challenge for Exploring Gravitational Wave Universe

Capacitive Sensing and Electrostatic Control System Design and Analysis With a Torsion Pendulum

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