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

[Hal Murray]

> You will not be able to find one with the correct wavelength. An unstabilized
> laser diode has an output bandwidth in the 50-300MHz range. Which means you
> need to hit the right wavelength with the accuracy of the bandwidth of the
> laser. For a bandwidth of 100MHz at 780nm that means you have to hit the
> right wavelength with an accuracy of 0.2pm. The slightes vibration, the
> slightest change in temperature, the slighest change of current through the
> laser diode or a fly coughing and you are off. That's why you have to
> actively steer the laser diode such that its output wavelength stays where
> you want it to be. If you are using a laser, there is no way around it. 

What parameter do I adjust if I want to steer a laser?


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