An atomic clock synchronized versatile all-in-one digital ‘LockBox’
Abstract A reliable and robust active stabilization of different control parameters is key to the success of many experiments. The essential hardware for that; lock-in detection, RF generator, and proportional-integral-derivative feedback control should have sufficient bandwidth, low noise operation...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-04-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-025-90971-8 |
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| Summary: | Abstract A reliable and robust active stabilization of different control parameters is key to the success of many experiments. The essential hardware for that; lock-in detection, RF generator, and proportional-integral-derivative feedback control should have sufficient bandwidth, low noise operation and versatility to use the system in different applications. Here we report a fully digital, all essential requirements in one system (LockBox), featured with complete control cum monitoring of the signals from a touchscreen display and the possibility of operating from a remote PC. The lock-in in it has DC to 840 kHz bandwidth, the sinusoidal generator for RF modulation is up to 62.5 MHz, the system noise is 13.2 $$\textrm{nV}_{\textrm{rms}}/\sqrt{\textrm{Hz}}$$ at 100 kHz, and referenced to a Rubidium-clock. We have demonstrated its use for stabilization of laser frequency using an emulated Pound-Drever-Hall and a fiber spool as two independent references, and also for arm length locking of a Michelson interferometer. |
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| ISSN: | 2045-2322 |