[time-nuts] Pressure sensitivity of Rb vapor cell standards

[Dana Whitlow]

What's the optimum wavelength for the Rb light source?  A laser would
certainly have
a much narrower linewidth than an LED, provided one can find a laser with
the correct
wavelength.  Many diode lasers have a detector integrated into the same
package, making
tightly-stabilized output power a snap to achieve.

Also: at 60C is the vapor pressure of Rb high enough to work with vis-a-vis
achieving a
quality lock to the atomic transition?

Dana


On Tue, Feb 18, 2020 at 4:07 AM Attila Kinali <attila at kinali.ch> wrote:

> On Mon, 17 Feb 2020 18:16:04 -0600
> magnus <magnus at rubidium.se> wrote:
>
> > Hi,In the 5065 and most others, the light intensity is not stabilized.
> > It should not be too hard to regulate the Rb lamp amplitude and servo
> > it to light intensity from the detector. Didn't Poul-Henning check this?
>
>
> I still think, replacing the 5065 lamp with a 780nm LED would be worthwhile
> to try. Yes, the LEDs have a broader spectrum than a lamp, but it is a lot
> easier to keep it stable than a fluerescent lamp. It would also allow to
> lower the temperature of the Rb cell to get to the zero tempco point (which
> seems to be around 60°C for most mixtures).
>
>
>                                 Attila Kinali
>
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