EEVblog Electronics Community Forum
Electronics => Metrology => Topic started by: TheUnnamedNewbie on November 06, 2019, 10:30:29 am
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Anyone here know of people who have tried this in a more diy-context? I imagine that by far the hardest part here is the sourcing of the rubidium itself?
Some colleagues and I are looking at giving this a shot for our 'project friday' workdays. This does mean we have access to some good equipment from T&M point of view.
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How 'DIY' are you thinking of?
If you're starting off with a few bits from an old rubidium it's one thing, but trying to make the cell is something else.
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Anyone here know of people who have tried this in a more diy-context? I imagine that by far the hardest part here is the sourcing of the rubidium itself?
You want to DIY-manufacture rubidium gas-cell frequency standard? This:
(http://www.paleotechnologist.net/wp-content/uploads/2012/03/rubidium_diagram.gif)
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I imagine that by far the hardest part here is the sourcing of the rubidium itself?
these may or may not be suitable..
https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1470 (https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1470)
600 to 900eur, they seem to have both 'natural' (mostly Rb85 I guess) and Rb87.
There are some all-optical Rb-clock setups, where you only need 780nm light (frequency doubled 1560nm telecom laser) - which might be worth a look?
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good luck
https://www.ebay.com/itm/Rb-High-Precision-Low-Phase-Noise-Rubidium-Atomic-Clock-Soviet-Ussr-DIY/123737315177?hash=item1ccf519769:g:~K0AAOSw0VBctceW (https://www.ebay.com/itm/Rb-High-Precision-Low-Phase-Noise-Rubidium-Atomic-Clock-Soviet-Ussr-DIY/123737315177?hash=item1ccf519769:g:~K0AAOSw0VBctceW)
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There are some all-optical Rb-clock setups, where you only need 780nm light (frequency doubled 1560nm telecom laser) - which might be worth a look?
If you want to go the laser route. Check out Eagleyard Photonics (https://www.eagleyard.com/products/single-frequency-laser-diodes/ (https://www.eagleyard.com/products/single-frequency-laser-diodes/)) and their DFB diodes, but don't expect this route to be cheap. Better, but certainly not cheaper than a brand new PRS10.
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good luck
https://www.ebay.com/itm/Rb-High-Precision-Low-Phase-Noise-Rubidium-Atomic-Clock-Soviet-Ussr-DIY/123737315177?hash=item1ccf519769:g:~K0AAOSw0VBctceW (https://www.ebay.com/itm/Rb-High-Precision-Low-Phase-Noise-Rubidium-Atomic-Clock-Soviet-Ussr-DIY/123737315177?hash=item1ccf519769:g:~K0AAOSw0VBctceW)
If this turned out to be a combined cell rather than a seperate resonance cell or filter cell, that would be a huge stroke of luck. I thought I read something about someone evaluating these cells, but I haven't seen any results.
Ed