Arm locking performance with the new LISA design

Ghosh, S.; Sanjuán, Josep; Mueller, G.

doi:10.1088/1361-6382/ac69a4

Cited by 10 publications

(4 citation statements)

References 24 publications

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“…In the measurement principle, we first use arm-locking ranging to coarsely determine the inter-satellite distance. Arm locking is a technique for laser frequency noise reduction, in which the laser frequency of the cavity-stabilized laser is locked to the baseline length of the constellation [29][30][31]. Since the baseline of the space-borne GW detector is ultra-stable in the science band, the laser frequency noise can be further reduced.…”

Section: Arm-locking Rangingmentioning

confidence: 99%

“…In particular, we propose a novel scheme for inter-satellite ranging. We use the technique of arm-locking [29][30][31] ranging to pre-determine the inter-satellite distance and consequently the non-ambiguity range can be expanded to be extremely large. We perform numerical simulations and experimental demonstrations to examine the performance of TDI ranging.…”

Section: Introductionmentioning

confidence: 99%

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Absolute Ranging with Time Delay Interferometry for Space-Borne Gravitational Wave Detection

Luo,

Xu,

Wang

et al. 2024

Sensors

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In future space-borne gravitational wave (GW) detectors, time delay interferometry (TDI) will be utilized to reduce the overwhelming noise, including the laser frequency noise and the clock noise etc., by time shifting and recombining the data streams in post-processing. The successful operation of TDI relies on absolute inter-satellite ranging with meter-level precision. In this work, we numerically and experimentally demonstrate a strategy for inter-satellite distance measurement. The distances can be coarsely determined using the technique of arm-locking ranging with a large non-ambiguity range, and subsequently TDI can be used for precise distance measurement (TDI ranging) by finding the minimum value of the power of the residual noises. The measurement principle is introduced. We carry out the numerical simulations, and the results show millimeter-level precision. Further, we perform the experimental verifications based on the fiber link, and the distances can be measured with better than 0.05 m uncertainty, which can well satisfy the requirement of time delay interferometry.

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Section: Arm-locking Rangingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Absolute Ranging with Time Delay Interferometry for Space-Borne Gravitational Wave Detection

Luo,

Xu,

Wang

et al. 2024

Sensors

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“…Thus, researchers confirmed and directly measured the predictions of Einstein's general theory of relativity about gravitational waves [1], thereby opening a new chapter in gravitational-wave astronomy. Several gravitational-wave sources in the universe are distributed in the frequency band of 0.1 mHz-1 Hz [2,3], containing information on the early structure and evolution of the universe, such as that related to double compact star systems, supermassive double black hole orbiting systems, intermediate mass double black hole rotation systems, and supermassive black hole mergers caused by galaxy mergers.…”

Section: Introductionmentioning

confidence: 99%

Evaluation method for the design results of space gravitational-wave telescopes

Lin

Huang

et al. 2023

Meas. Sci. Technol.

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Unlike traditional imaging telescopes, space gravitational-wave telescope has higher requirements for the wavefront error and must meet the stability requirement of the tilt-to-length (TTL). The tolerance analysis results of current telescopes can judge whether the wavefront error meets the requirements, but they cannot be used as the judgment result of the TTL noise coupling coefficient of the telescope. To analyze the influence of manufacturing errors of the telescope on the coupling coefficient of TTL noise, based on the error amount and the Zernike polynomial first-order sensitivity matrix, we established the sensitivity matrix of the mapping relationship between telescope manufacturing errors and coupling coefficients. For example, consider the design results of an off-axis four-mirror space gravitational-wave telescope. If the wavefront error was used as the judgment result to determine the tolerance distribution, the cumulative probability of the coupling coefficient meeting the requirements would be 66.7%. Furthermore, using the coupling coefficient as the control requirement and determining the tolerance allocation results according to the coupling coefficient sensitivity matrix, the cumulative probability increased to 93.8%. The necessity of using the coupling coefficient as an evaluation method for the design results of gravitational-wave telescopes was verified. This evaluation method can provide meaningful guidance for the design results of gravitational-wave telescopes.

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“…Furthermore, modified dual arm locking is presented [14,15] to solve the doppler-induced frequency pulling problem, while maintaining the gain advantages of dual arm locking. Although remarkable progress has been achieved for arm locking in the past two decades [16][17][18][19], all the arm locking controllers reported so far are based on a forward design approach, which seriously limits the design freedom and results in an unoptimized noise suppression performance. In this paper, an inverse-design-based architecture for arm locking controller is proposed for the first time.…”

Section: Introductionmentioning

confidence: 99%

An inverse-design-based arm locking controller for space gravitational wave detector

Zhang,

Wang,

et al. 2023

Advanced Sensor Systems and Applications XIII

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Since gravitational waves are extremely weak, the frequency noise of the lasers in space-based gravitational wave detectors need to be substantially reduced. One of the key technologies for laser frequency reduction is arm locking. Currently, all the reported controllers in arm locking have an inherent tradeoff between the frequency noise suppression ratio at low frequencies and the noise gain at high frequencies. In this paper, for the first time the inverse design idea is introduced into arm locking controller. By utilizing a multi-parameter co-optimization scheme, the frequency noise suppression ratio in the science band (0.1 mHz to 1 Hz) and the noise gain above the science band can be optimized simultaneously. This work can be generalized to different kinds of arm locking controller design and will effectively improve the sensitivity of the space-based gravitational wave detector.

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Arm locking performance with the new LISA design

Cited by 10 publications

References 24 publications

Absolute Ranging with Time Delay Interferometry for Space-Borne Gravitational Wave Detection

Absolute Ranging with Time Delay Interferometry for Space-Borne Gravitational Wave Detection

Evaluation method for the design results of space gravitational-wave telescopes

An inverse-design-based arm locking controller for space gravitational wave detector

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