🚀 go-pugleaf

When talking about IR, generally you speak of wavelength, not frequency.
Looking at a handy catalog, the only one I can find uses a wavelength of
788nm.

If the police LIDAR systems use commonly available IR LaserLEDS, you could
fit a few around the front of your car so a cop in any position in front of you
sees at least ond diode.  Modulate the power supply with a little noise (like
ignition noise) and the officer won't be able to get a reading that makes any 
sense to his machine.

If your source is brighter than the reflection of the officer's source.

If they find the system on your car, say it is your garage door opener.

Better yet, if you're a ham, it's an experimental radio device, since hams can
use any freq above 300 GHz.