Here they are! 18 different laser sound effects as a free download:
Free Laser Sound Effects (23 MB)
I created these in Adobe Audition using Generate Tones, Audacity using Generate Chirp and Logic Pro X using the Retro Synth (on FM setting) and the legendary ES2 synthesizer. Then some EQ, compression and a good washing in a large room plate reverb.
Grab them and enjoy making playing with laser SFX to your content!