Radar detectors do have laser detectors, but unfortunately they don’t offer any true protection against speeding tickets.
Due to the way laser is designed, you generally won’t get any advanced warning from your radar detector. By the time it goes off, the officer already has your speed. In essence against laser, a radar detector is little more than a speeding ticket notifier.
Additionally, because laser is such a thin and small beam, when an officer is aiming at your front grill or rear plate, often times your radar detector won’t even alert at all. It’s for that reason that I recommend pairing a laser jammer with your radar detector.