> > [email protected] said: > > 2. Magnetic state selection, as used in the 5071A, would be replaced by > > optical pumping. Len Cutler was heartbroken that HP/Agilent management > > wouldn't fund this effort. > > > It turns out that, even now in 2018, optical pumping is not ready for > prime > > time in a working standard because the lasers drift over time. > > Is there something fundamental in there, or is the lack of products because > nobody has made the big investment required to figure out how to do it. >
FWIW, OSA has been giving at leat one talk per year on their optical Cs work, and as others have noted it's been coming "real soon" for a couple of years now. Here are some links: 2015 November: http://www.chronos.co.uk/files/pdfs/itsf/2015/day2/1410_High_performance_optically-pumped_cesium_beam_clock-PBerthoud-Oscilloquartz.pdf 2017 April: https://www.atis.org/wsts/library/2017/5-03_Oscilloquartz_Berthoud_Michaud_Optical%20Cs%20Beam%20clock%20for%20ePRTC%20applications_revision20170327.pdf _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
