Metraipolis › archive › dc_f599019ea0dd

Real-Time Doppler-Frequency Measurement and Frequency-Pulling Suppression in Arm-locking — arXiv:2609.24686

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.24686
License (as archived): CC0-1.0
Archived: 2026-10-09T23:49:06.218Z
SHA-256 of the archived text: 1e7a6dac8ad031d65ae235eac6dcc0c40c79b1581752a40cf2a1acda224e68e9
Stable URL of this page: https://metraipolis.com/documento/dc_f599019ea0dd

How to cite

Real-Time Doppler-Frequency Measurement and Frequency-Pulling Suppression in Arm-locking — arXiv:2609.24686 — arXiv (en), https://arxiv.org/abs/2609.24686 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_f599019ea0dd (Metraipolis archive dc_f599019ea0dd, sha256 1e7a6dac8ad031d65ae235eac6dcc0c40c79b1581752a40cf2a1acda224e68e9)

BibTeX

@misc{dcf599019ea0dd,
  title = {Real-Time Doppler-Frequency Measurement and Frequency-Pulling Suppression in Arm-locking — arXiv:2609.24686},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.24686},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_f599019ea0dd; sha256 1e7a6dac8ad031d65ae235eac6dcc0c40c79b1581752a40cf2a1acda224e68e9},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.24686. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Arm-locking is an important technique for suppressing laser frequency noise in space-based gravitational-wave detection. However, stronger noise suppression inevitably increases the magnitude of frequency pulling, thereby prolonging the lock-acquisition time and increasing the risk of system instability. To address this issue, this paper proposes a real-time Doppler-frequency measurement and frequency-pulling suppression method based on a linear-quadratic-gaussian controller. To achieve a balance between noise suppression and pulling suppression, a time-varying control strategy is adopted. At the initial stage of the time-varying control process, the primary objective is to rapidly limit frequency pulling. Subsequently, the level of pulling suppression is gradually relaxed while the capability for laser frequency-noise suppression is progressively enhanced, so that the residual frequency noise satisfies the time-delay interferometry (TDI) requirement by the end of the transition. Comprehensive performance simulations are conducted for several arm-locking configurations. The results show that the proposed suppressor can reduce frequency pulling within approximately 1000 s while limiting its magnitude to below 100 MHz, thereby eliminating the need for the conventional Doppler frequency pre-estimation stage. When a Fabry-Perot laser is used, the amplitude spectral density (ASD) of the closed-loop laser frequency noise meets the requirements of second-generation and first-generation TDI after 2000 s and 9200 s of closed-loop operation, respectively. These results demonstrate that the proposed suppressor provides both rapid frequency-pulling suppression and a high level of laser frequency-noise suppression. This new method provide a feasible way for rapid acquisition and locking of arm-locking.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-22 in astro-ph.IM).
Categorie arXiv: Optics (physics.optics) ; Instrumentation and Methods for Astrophysics (astro-ph.IM); General Relativity and Quantum Cosmology (gr-qc).
Pagina del lavoro: https://arxiv.org/abs/2609.24686 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-09T22:50:22.320Z dalla pagina https://arxiv.org/catchup/astro-ph.IM/2026-09-22?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).