English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present PyRPL, an open source software package that allows theimplementation of automatic digital feedback controllers for quantum opticsexperiments on commercially available, affordable FPGA boards. Our softwareimplements the digital generation of various types of error signals, from ananalog input through the application of loop filters of high complexity andreal-time gain adjustment for multiple analog output signals, includingdifferent algorithms for resonance search, lock acquisition sequences andin-loop gain optimization. Furthermore, all necessary diagnostic instrumentssuch as an oscilloscope, a network analyzer and a spectrum analyzer areintegrated into our software. Apart from providing a quickly scalable,automatic feedback controller, the lock performance that can be achieved byusing PyRPL with imperfect equipment such as piezoelectric transducers andnoisy amplifiers is better than the one achievable with standard analogcontrollers due to the higher complexity of implementable filters andpossibilities of nonlinear operations in the FPGA. This drastically reduces thecost of added complexity when introducing additional feedback loops to anexperiment. The open-source character also distinguishes PyRPL from commercialsolutions, as it allows users to customize functionalities at various levels,ranging from the easy integration of PyRPL-based feedback controllers intoexisting setups to the modification of the FPGA functionality. A community ofdevelopers provides fast and efficient implementation and testing of softwaremodifications.

FPGA-based feedback control of quantum optics experiments with the open source software package PyRPL