Hi If you are going to thermally excite the resonator, and measure the resonance optically, there’s no reason at all to use quartz. There are other materials with much higher acoustic Q than quartz.
Bob On Apr 21, 2014, at 9:47 AM, Magnus Danielson <[email protected]> wrote: > > > On 04/21/2014 03:18 PM, Attila Kinali wrote: >> On Mon, 21 Apr 2014 14:54:12 +0200 >> Magnus Danielson <[email protected]> wrote: >> >>>> They used a 10mW HeNe laser, modulated with 1kHz to 1MHz on >>>> various quartz cuts (X+5°, DT, AT) and could measure oscillations >>>> of the quartz using metal electrodes. >>>> The mechanism of exitation was photothermal >>> >>> 10 mW laser is reasonable. >>> >>> What levels of signal where they getting? >> >> 6.2mV, with an real laser incident power of 5mW (the AOM "ate" half of the >> power) > > Cool. Today we use semiconductor lasers that we can modulate directly, so no > need for the AOM on the NeHe laser. > > Cheers, > Magnus > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
