Anton, Not sure your email suggested a bad lamp. I think it was just the question on the filter. If there is a lamp issue happy to suggest ways of perhaps getting it going again that I have used. Maybe best off line since this has been communicated before. Regards Paul WB8TSL
On Sun, Nov 6, 2016 at 9:52 AM, Robert Watson via time-nuts < time-nuts@febo.com> wrote: > Actually some commercial rubidium clocks do use lasers. Check out the > Microsemi SA.3Xm family. > > Nonetheless the point about the wavelength stability requirement is > absolutely the case. There are some papers published about the SA.3X > clocks. I can't post links to them, but a quick web search for "A > commercial CPT rubidium clock" by Deng et al. should reveal all. > > R. > > On 6 November 2016 at 02:56, <cdel...@juno.com> wrote: > > > Anton, > > > > To answer both questions: > > > > You can use a Laser in place of the Rubidium lamp, however assuming the > > problem is the lamp it would be cheaper to buy several LPRO units to > > scavenge for a replacement lamp. > > > > How did you determine it's the lamp that is dead? > > > > Using a Laser is more complicated than it sounds. The Laser frequency has > > to be stabilized at the proper wavelength. This usually requires a > > combination of selecting the proper diode current as well as the proper > > temperature. Even then the diode ages and drifts away from the proper > > spot. Sometimes a separate Rubidium vapor cell is used to stabilize the > > frequency of the diode. > > > > The equipment to run the diode would take up MUCH more room than the > > LPRO! > > > > This is why you don't find commercial Rubidiums using Laser diodes! (YET) > > > > The Super modification will not work on the miniature Rubidiums. > > (although some do filter the lamp to get a better SN, however performance > > is not anywhere near a Super.) > > > > The 5065A has a large cell and runs at a low temperature, this offers the > > ideal stability and the chance to Super it. > > > > Even so not all 5065A can be Supered! > > > > Cheers, > > > > Corby Dawson > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to https://www.febo.com/cgi-bin/ > > mailman/listinfo/time-nuts > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.