[time-nuts] optically excite a quartz crystal?

[Magnus Danielson]

On 04/21/2014 11:40 AM, Attila Kinali wrote:
> On Mon, 21 Apr 2014 17:12:54 +1200
> Bruce Griffiths <bruce.griffiths at xtra.co.nz> wrote:
>
>> Optical excitation of quartz resonators: Electronics Letters
>> <http://digital-library.theiet.org/content/journals/el>, Volume 18,
>> Issue 9 <http://digital-library.theiet.org/content/journals/el/18/9>, 29
>> April 1982, p. 381 – 382
>
> Thanks Bruce!
>
> For those who dont want to buy the paper, here a short summary:
>
> 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?

Cheers,
Magnus