One of the dangers of working with lasers is the risk of fire. The standard protcol is to only the laser while supervised and to install fire alarms. For added safety, you can also implement a fire detection system. This can catch fires earlier than a fire alarm and prevent damage.
The implementation I used was to take two ESP8266s and have them communicate through ESP-NOW. This has a limited working range, but it is simpler than using WiFI, where you might run into issues like IP addresses rotating without warning. One ESP8266 (sensor node) connects to the sensors, while the other attaches to a buzzer that alerts you when something is off.
Here’s the basic setup. The buzzer beeps when the smoke/heat/IR readings are above threshold value for multiple readings in a row. The buzzer beeps when it hasn’t received a steady flow of data for more than a few seconds, in case of unexpected disconnection.
This is what it looks like once wired together. You can also chain multiple sensors for multiple lasers into the same ESP. Further implementation details can be found in the Github Repo