Frequency modulation of an ECDL laser using Artiq

Yolan_A

I would like to modulate the frequency of a 852 nm laser already connected to Artiq system by applying a sinusoidal RF signal. Modulation bandwidth is a between 100 - 210 MHz. I am new to Artiq by from searching online, I know this can be done via the DDS channel (Urukul). I have previously been able to alter the laser frequency by applying a constant voltage. Could someone please explain to me how I can implement this kind of time varying modulation that I can monitor on an oscilloscope?

Many thanks,

Y.A

sb10q

What laser is it and what modulation input does it expect?

Usually for such high frequencies, this is done with a bias-tee that injects RF into the laser diode, possibly with additional (complex) impedance matching components if you care about efficiency and SWR.

sb10q

As for monitoring the result, you'll probably want to use a scanning optical resonator (SFPI or thermally tuned fiber ring) and not just an oscilloscope.