Re: [time-nuts] Coherent optical clock down-conversion for microwave frequencies with 10^−18 instability

https://tf.nist.gov/general/pdf/2995.pdf may be also of some interest. Its about optimising the linearity of high speed photodiodes. These are used (amongst other applications )as mixers for converting optical combs to microwave signals. Bruce > On 05 June 2020 at 11:35 Bill Byrom wrote: > >

Re: [time-nuts] Coherent optical clock down-conversion for microwave frequencies with 10^−18 instability

Thanks, Bruce! That's a copy of that same Science article. I guess that NIST got permission to post it on their website, since they were the sponsor of the study. -- Bill N5BB On Thu, Jun 4, 2020, at 6:32 PM, Bruce Griffiths wrote: > https://tf.nist.gov/general/pdf/3093.pdf > is likely more

Re: [time-nuts] Coherent optical clock down-conversion for microwave frequencies with 10^−18 instability

https://tf.nist.gov/general/pdf/3093.pdf is likely more accessible than the sciencemag link Bruce > On 05 June 2020 at 11:15 Bill Byrom wrote: > > > This was published in the 22 May 2020 issue of Science (AAAS journal). For > AAAS members, the direct link is: >

[time-nuts] Coherent optical clock down-conversion for microwave frequencies with 10^−18 instability

This was published in the 22 May 2020 issue of Science (AAAS journal). For AAAS members, the direct link is: https://science.sciencemag.org/content/368/6493/889 They make use of a fiber-based OFC (optical frequency comb) and state-of-the-art photodetectors to transfer optical clock stability