Complete Catalog of Laser Locking Configurations for LISA
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909752085184512 |
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| author | Heinzel, Gerhard Álvarez-Vizoso, Javier Dovale-Álvarez, Miguel |
| author_facet | Heinzel, Gerhard Álvarez-Vizoso, Javier Dovale-Álvarez, Miguel |
| contents | The Laser Interferometer Space Antenna (LISA) will enable direct observations of low-frequency gravitational waves, offering unprecedented insight into astrophysical and cosmological phenomena. LISA's heterodyne interferometric measurement system requires phase-locking five of its six onboard lasers with tunable frequency offsets to ensure that all beatnotes remain within the metrology system's operational range, despite Doppler-induced frequency shifts. The selection of these offset frequencies -- collectively forming a frequency plan -- is a complex optimization problem constrained by the spacecraft's orbital dynamics and instrument limitations. While previous work established an algorithmic solution for deriving time-dependent frequency plans, this study takes a complementary approach by systematically analyzing and cataloging all possible laser locking configurations. We present an automated method to explore, validate, and classify viable locking schemes, identifying 36 unique non-frequency-swapping configurations and 72 additional frequency-swapping configurations for an arbitrary choice of primary laser. This exhaustive classification provides a foundation for frequency planning across the full range of operational scenarios. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_22406 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Complete Catalog of Laser Locking Configurations for LISA Heinzel, Gerhard Álvarez-Vizoso, Javier Dovale-Álvarez, Miguel Instrumentation and Detectors Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology Space Physics The Laser Interferometer Space Antenna (LISA) will enable direct observations of low-frequency gravitational waves, offering unprecedented insight into astrophysical and cosmological phenomena. LISA's heterodyne interferometric measurement system requires phase-locking five of its six onboard lasers with tunable frequency offsets to ensure that all beatnotes remain within the metrology system's operational range, despite Doppler-induced frequency shifts. The selection of these offset frequencies -- collectively forming a frequency plan -- is a complex optimization problem constrained by the spacecraft's orbital dynamics and instrument limitations. While previous work established an algorithmic solution for deriving time-dependent frequency plans, this study takes a complementary approach by systematically analyzing and cataloging all possible laser locking configurations. We present an automated method to explore, validate, and classify viable locking schemes, identifying 36 unique non-frequency-swapping configurations and 72 additional frequency-swapping configurations for an arbitrary choice of primary laser. This exhaustive classification provides a foundation for frequency planning across the full range of operational scenarios. |
| title | Complete Catalog of Laser Locking Configurations for LISA |
| topic | Instrumentation and Detectors Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology Space Physics |
| url | https://arxiv.org/abs/2505.22406 |