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

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, <cdelect@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. >

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, <cdelect@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. >