I'm trying to make a laser detection circuit, and I need to modulate a laser (I have a 5mw laser diode module) at a certain frequency so that the detector can bandpass filter to that frequency.
my question is about the circuitry involved to drive the laser. Am I basically just looking for a square wave generator at a certain frequency?
I've been looking for ICs made to do what I need, but have not had any luck, somewhere in a post someone said Maxim may have something for laser modulation, but I've had no luck at their site.
does anyone know of any ICs that would work?
Thanks