Running AO at multiple rates

[cirrusio]

Hello all,

I have a device which consists of five cells.  In each cell, I am controlling a laser at a fixed frequency; this frequency is the fundamental (resonant) frequency of the cavity.  Operating the laser at the this fundamental frequency is required as we are attempting to amplify an acoustic signal generated by the interaction of particles with the beam.  The problem is that each cell may have a slightly different fundamental frequency which in turn requires operation of the laser at slightly different frequencies and therefore slightly different AO rates.  I am currently using a PXI-6723 board for generation of the signal, but it is seems that I will not be able to control the AO at different rates.  Does anyone have any thoughts on generating signals with different frequencies at the same update rate so that I can utilize this board?  Is there a board that will allow me to operate at different rates?  (A quick search suggests that there is an FPGA board that will allow me to do this, but I am not sure if there are any other recent developments).

Cheers, Matt

[aNIta B]

Hi Matt,

         You should be able to accomplish what you're wanting to do by creating your different waveforms of different frequencies and bundling them together.  You'll put your different channels in one task, and then feed the bundled waveform into your AO write.  It will write your two waveforms at the same update rate at different frequencies on your separate channels.  Happy programming, let me know if that's not what you're looking for.