Re: [time-nuts] Frequency Stability Analyzer - ZCDs
Kind of the opposite of what you are asking: ultrafast laser spectroscopy
is used to study chemical reactions and make measurements of their time
scales (often in the time range of several femtoseconds). And precise
timing of photons produced is critical to making the measurements.
The chemical processes at the femtosecond level seem to not click like
clockwork, but instead seem to have exponential decay curves like, say,
nuclear half-lives.
If you were looking to store long sequences of information in chemicals,
the model that comes to mind is DNA. A nice poster on timescales in cell
biology: https://www.cell.com/cell/pdf/S0092-8674(16)30208-2.pdf
Tim N3QE
On Sun, Jul 28, 2019 at 10:04 AM Glen English VK1XX <
glenlist@pacificmedia.com.au> wrote:
OK research people...since this forum is loaded with bleeding edge
understanding, Is there such a thing in the lab as a material that can
store, in a 2 level (1 bit) format (or more) , a discrete time
representation of some event ?
In my simple example (dream), an arrangement of some molecular or some
quantum storage medium, that can store an event at discrete intervals of
say, 100fs ? That is, the duration of the storage might be 1nS, storing
the state of something, at 100fs intervals (example ) ....having a (for
example) sample storage of 10000 samples, and the ability to freeze that
event (in some atomic level memory) for later readout once only or
continuously looped ?
No, I am not proposing this for my period /frequency analyser, I was
just wondering about super high speed digitization and storage of very
fast very short events.
-glen
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Electro-optic samplers are about the closest but they typically transform from time to spatial domain and have multibit resolution. The storage isnt atomic but in an image sensor attached to a spectroscometer.
http://beamdocs.fnal.gov/AD/DocDB/0025/002555/001/eos1.pdf
Bruce
On 28 July 2019 at 17:37 Glen English VK1XX glenlist@pacificmedia.com.au wrote:
OK research people...since this forum is loaded with bleeding edge
understanding, Is there such a thing in the lab as a material that can
store, in a 2 level (1 bit) format (or more) , a discrete time
representation of some event ?
In my simple example (dream), an arrangement of some molecular or some
quantum storage medium, that can store an event at discrete intervals of
say, 100fs ? That is, the duration of the storage might be 1nS, storing
the state of something, at 100fs intervals (example ) ....having a (for
example) sample storage of 10000 samples, and the ability to freeze that
event (in some atomic level memory) for later readout once only or
continuously looped ?
No, I am not proposing this for my period /frequency analyser, I was
just wondering about super high speed digitization and storage of very
fast very short events.
-glen
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