Better to use IR -> Photodiode -> RF module Transmitter (1Watt) -> up to 1 km distance -> RF module receiver -> IR LED
Lasers are very directional, unless you point them very tightly, you may miss the target. Plus, being IR, you couldn't see the light unless you use an IR viewer or IR capable camera.
If you want to control your neighbors tv, (I did that to the stupid jerk when they played loud music when I want to sleep) Try using a gang of IR leds (I used 140 LEDs, I reckon the power output about 600 lumen!!) on a strong driver, and aim the Leds approximately to the nearest window where the offending equipment resides and