Digital Control of Duty Factor with Synchronized Optical Choppers

Learn how to synchronize two SR542 Optical Choppers to achieve digital control of the duty factor of an optically-chopped beam. This method provides easier control of the duty factor compared to stacking two blades on a single motor, and opens the door to automated and programmatic studies of your signal as a function of duty factor. Chapters: 00:00:00 Intro 00:00:42 Stacked blades 00:01:15 Variable duty factor blade 00:02:03 Synchronized choppers 00:05:12 Phase alignment 00:05:59 Tuning the duty factor 00:10:07 Low SNR 00:10:28 Conclusion Download the Application Note here: https://thinksrs.com/downloads/pdfs/a... Get the SR542 Python Instrument Driver here: https://github.com/thinkSRS/srsinst.s... Buy or quote the SR542 here: https://thinksrs.com/products/sr542.html Follow us: Twitter:   / thinksrs   LinkedIn:   / thinksrs   YouTube:    / @thinksrs   #thinkSRS