Laser acquisition experimental demonstration for space gravitational wave detection missions

Gao, Ruihong; Liu, Heshan; Zhao, Ya; Luo, Ziren; Shen, Jia; Jin, Gang

doi:10.1364/oe.414741

Cited by 10 publications

(7 citation statements)

References 16 publications

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“…The beam radius of detection R d is defined as the maximum radial distance between the trajectory of the center of the scanning beam and the position of the receiving SC in the uncertainty plane, where the energy integrated by the detector on the receiv- ing SC is sufficiently high to detect the beam with the required centroiding accuracy (assuming a matrix detector is used, see e.g. [16]). Note that this definition depends on the angular scan speed γ and integration time T int , and assumes that integration starts at the point of closest approach (worst case).…”

Section: The Radius Of Detectionmentioning

confidence: 99%

Impact of spectral noise shape and correlations of laser beam jitter on acquiring optical links in space

Hechenblaikner¹

2022

Appl. Opt.

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We investigate how the probability of acquiring an optical link between a scanning and a target spacecraft depends on the spectral shape, power and dimensionality of the beam jitter, as well as on the choice of detector integration time, beam detection radius and scan speed. For slow scans and long integration times, the probability of failure (Pfail) is determined by the integrated jitter power up to a critical frequency, which we verify by comparing the results of an analytical model to those of Monte Carlo simulations. Jitter above the critical frequency leads to a loss of correlation between integration windows and decreases Pfail for both, 1d (radial) and 2d (radial and tangential) jitter, as long as the RMS jitter amplitude does not exceed the beam diameter. In the opposite limit of fast scans and short integration times, emergent correlations between jitter fluctuations on two adjacent scanning tracks also decrease Pfail. The analytical model is additionally used to assess the effect of multiple overlapping tracks and the impact of target drifts in the uncertainty plane.

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Section: The Radius Of Detectionmentioning

confidence: 99%

Impact of spectral noise shape and correlations of laser beam jitter on acquiring optical links in space

Hechenblaikner¹

2022

Appl. Opt.

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“…The product of the collecting aperture A ap , the transmission losses from the aperture to the detector T l , and the peak intensity I 0 can be combined to yield the maximum power incident on the detector when SC2 is located in the beam center: P max = 22 pW (see section 2.1). In order to obtain exemplary numbers for the LISA infield pointing architecture, we choose the TekWin SH640 CMOS camera that has been studied in the context of the TAIJI mission in [26,6], where essential detector parameters are listed. We assume an off-axis telescope with a magnification of M = 134, as used for recent telescope pointing architecture designs [27].…”

Section: Detection Performance For Variable Scan Ratesmentioning

confidence: 99%

“…This is then followed by the frequency acquisition phase, where the laser of SC2 is frequency offset-locked to the received laser from SC1 to enable coherent detection and heterodyne interferometry on the respective arm. Link acquisition with a scanning beam is also used for TAIJI [5,6], a planned Chinese gravitational wave observatory, and for other missions performing interferometry [7,8] as well as in most optical communication missions (see e.g. [9]).…”

Section: Introductionmentioning

confidence: 99%

Optical link acquisition for the LISA mission with in-field pointing architecture

Hechenblaikner,

Delchambre,

Ziegler

2023

Preprint

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We present a comprehensive simulation of the spatial acquisition of optical links for the LISA mission in the in-field pointing architecture, where a fast pointing mirror is used to move the field-of-view of the optical transceiver, which was studied as an alternative scheme to the baselined telescope pointing architecture. The simulation includes a representative model of the far-field intensity distribution and the beam detection process using a realistic detector model, and a model of the expected platform jitter for two alternative control modes with different associated jitter spectra. For optimally adjusted detector settings and accounting for the actual far-field beam profile, we investigate the dependency of acquisition performance on the jitter spectrum and the track-width of the search spiral, while scan speed and detector integration time are varied over several orders of magnitude. Results show a strong dependency of the probability for acquisition failure on the width of the auto-correlation function of the jitter spectrum, which we compare to predictions of analytical models. Depending on the choice of scan speed, three different regimes may be entered which differ in failure probability by several orders of magnitude. We then use these results to optimize the acquisition architecture for the given jitter spectra with respect to failure rate and overall duration, concluding that the full constellation could be acquired on average in less than one minute. Our method and findings can be applied to any other space mission using a fine-steering mirror for link acquisition.

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“…To meet these requirements, a GD4542-20M QPD is chosen (China Electronic Technology Corporation, Chongqing, China), the technical parameters for which are listed in Table 3. As mentioned in the literature [42], the two acquisition procedures based on CCD and QPD have strong coupling; therefore, by utilizing the DWS technology, not only can the effect of the acquisition phase based on the CCD be verified, but the specification test for the pointing jitter can also be performed. With testing accuracy in the region of 1 nrad/ √ Hz, the high-precision angle measurement requirements for the semi-physical simulation test system can also be met.…”

Section: Semi-physical Simulation Test For the Establishment Of Inter-satellite Laser Linksmentioning

confidence: 99%

Research on Semi-Physical Simulation Testing of Inter-Satellite Laser Interference in the China Taiji Space Gravitational Wave Detection Program

Wang

Meng²,

Xu³

et al. 2021

Applied Sciences

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To guarantee a smooth in-orbit space gravitational wave detection for the Taiji mission, a semi-physical simulation test of inter-satellite laser interference is carried out. The semi-physical simulation test consists of three aspects: the establishment of the inter-satellite laser link, interferometry of the inter-satellite ranging, and simulation of the space environment. With the designed specifications for the semi-physical simulation platform, the test results for the inter-satellite laser interference can be obtained. Based on the semi-physical simulation test, the risks of inter-satellite laser interference technology can be mitigated, laying a solid foundation for the successful detection of in-orbit gravitational waves.

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Laser acquisition experimental demonstration for space gravitational wave detection missions

Cited by 10 publications

References 16 publications

Impact of spectral noise shape and correlations of laser beam jitter on acquiring optical links in space

Impact of spectral noise shape and correlations of laser beam jitter on acquiring optical links in space

Optical link acquisition for the LISA mission with in-field pointing architecture

Research on Semi-Physical Simulation Testing of Inter-Satellite Laser Interference in the China Taiji Space Gravitational Wave Detection Program

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