You make it sound like you want to communicate with UFO's by lasing them with 2.3W's.
Lasers are serious. Especially at the power levels your talking about.
Not a good choice as a 1st laser. Get your feet wet first.
Once you see what 150mW of green looks like, you'll be hooked.
And forget about the aliens ok?
High-fidelity audio signal successfully transmitted / received at a distance of 6.5 miles employing only a cheap red laser pointer as the light source and a readily available photodiode as the detector. Light and sound Post #25
How far can we transmit high-fidelity audio with a cheap laser pointer (and other cheap equipment)?
These photos show some DX testing with the cheap laser modulator, receiver/demodulator, and associated (cheap) optical equipment (click the links above). Tests were made at 80' (24m), 500' (150m), 1200' (365m), 1 mile (1600m), 6.5 miles (10.5km) and 22 miles (35km). The tests were generally successful to the 6.5 mile test distance, though at 6.5 miles the sound was less than broadcast quality (future hardware enhancements may improve that).