Tracking Length and Differential-Wavefront-Sensing Signals from Quadrant Photodiodes in Heterodyne Interferometers with Digital Phase-Locked-Loop Readout
| العنوان: | Tracking Length and Differential-Wavefront-Sensing Signals from Quadrant Photodiodes in Heterodyne Interferometers with Digital Phase-Locked-Loop Readout |
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| المؤلفون: | N. Brause, Miguel Dovale Álvarez, Alvise Pizzella, Juan Jose Esteban Delgado, Gerhard Heinzel |
| المصدر: | Physical Review Applied 14 (2020), Nr. 5 Physical Review Applied |
| بيانات النشر: | American Physical Society (APS), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics - Instrumentation and Detectors, Wavefronts, FOS: Physical sciences, General Physics and Astronomy, Phase locked loops, Dynamical behaviors, 02 engineering and technology, Quadrant (instrument), 01 natural sciences, Laser mode locking, law.invention, Attractive solutions, Heterodyne interferometer, Heterodyne laser interferometers, Laser interferometry, Optics, law, Underwater acoustics, 0103 physical sciences, Astronomical interferometer, ddc:530, Light conditions, 010306 general physics, Photodiodes, Instrumentation and Methods for Astrophysics (astro-ph.IM), Wavefront, Physics, Signal to noise ratio, Interferometers, business.industry, Quadrant photodiodes, Instrumentation and Detectors (physics.ins-det), 021001 nanoscience & nanotechnology, Laser, Photodiode, Phase-locked loop, Heterodyning, Differential wavefront sensing, Digital phase locked loops, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, Astrophysics - Instrumentation and Methods for Astrophysics, 0210 nano-technology, business, Physics - Optics, Optics (physics.optics) |
| الوصف: | We propose a method to track signals from quadrant photodiodes (QPD) in heterodyne laser interferometers that employ digital phase-locked loops for phase readout. Instead of separately tracking the four segments from the QPD and then combining the results into length and Differential Wavefront Sensing (DWS) signals, this method employs a set of coupled tracking loops that operate directly on the combined length and angular signals. Benefits are increased signal-to-noise ratio in the loops and the possibility to adapt the loop bandwidths to the different dynamical behavior of the signals being tracked, which now correspond to physically meaningful observables. We demonstrate an improvement of up to 6 dB over single-segment tracking, which makes this scheme an attractive solution for applications in precision inter-satellite laser interferometry in ultra-low-light conditions. Comment: 11 pages, 8 figures |
| وصف الملف: | application/pdf |
| تدمد: | 2331-7019 |
| DOI: | 10.1103/physrevapplied.14.054013 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::238b1714bee4ccda4724ad8f630ad371 https://doi.org/10.1103/physrevapplied.14.054013 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....238b1714bee4ccda4724ad8f630ad371 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 23317019 |
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| DOI: | 10.1103/physrevapplied.14.054013 |