Year: 2025
Type: article
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 [Formula: see text] 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.
Source: Scientific Reports
Authors: S. Johnson, S. Das Gupta, T. R. Saravanan, S. Banerjee, S. Majhi, S. De
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
OpenAlex ID: W4409246188