Here are some ways you could incorporate lasers:

1. Design and build a laser cutter controlled by a microcontroller. You could experiment with cutting different materials, such as wood or aluminum.
2. Design a laser-based security system. You can use lasers to create a tripwire to detect when physical events happen, and do actions accordingly, e.g. starting a video recording or sounding an alarm.
3. Design a laser-based distance measuring system. You can build one that uses a singular laser to measure distance point to point, or use an array of lasers to measure the dimensions of a 3D object.

I hope these ideas give you a starting point for your thesis project. Good luck!
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