Well done.

I didn’t think fibre optic cable worked like that.

On the case of the real drone, the laser is destroying the cable.

On the OP’s case, yes a laser can interrupt the communication. But the drone needs to keep sending it, or the drone will just continue after it’s gone. On the other hand, you need less power.

But the drone needs to keep sending it, or the drone will just continue after it’s gone.

unless it injects a detonation command

If you can inject commands into a communication line, somebody was really stupid while designing it.
Well those fiber optic line end points are not exactly encrypted, they use off the shelf components like HDMI over Fiber adapters, and serial over fiber for control link. In rare cases they could maybe use a actual IP connection over fiber but i doubt that since, it would add overhead, latency and make the hardware setup a lot more complex and expensive (if would be able to encrypt tho).
Wouldn’t any civilian endpoint they’re buying be designed to use IP?
no, because often its not “internet/network over fiber” stuff but HDMI over fiber no ip there. HDMI cables have very limited lenght due to high frequency beeing used in em, so if you have a media production company and a few spread out cameras HDMI over fiber is kinda common
Which happens, but then a different idiot tends to fix it. See what happened with the Starlink-controlled drones.
The fibre that’s carried by combat drones is uncoated, so with the right angle it’s possible to inject another signal.
We still don’t know the full story, it was probably a drone flying rounds trying to detect fiber optic and something else cut the cable, there’s no way you’re powering a 5kW laser off a quad