Fiber Optic Laser Veins
Your character has integrated fiber optic cables throughout their body, running parallel to their circulatory system, using their bio tech integration power. These aren't just conduits for the laser, they're fiber lasers, where the fiber itself is the gain medium that generates and amplifies the light.
This is real technology! Fiber lasers are one of the most common industrial laser types, used for cutting metal and other high-power applications. The fiber is doped with rare-earth elements like or ytterbium, and when pumped with energy, it generates coherent light along its length.
For your character:
Power Generation: Their control over electromagnetism lets them pump energy into the doped fibers, essentially turning their entire circulatory-adjacent fiber network into a distributed laser array.
No Tissue Damage: Light stays contained within the fiber through total internal reflection, the same principle that lets fiber optic cables carry internet signals without leaking. The light never touches surrounding tissue until it exits at the designated point.
Flexible Output Points: With a network throughout the body, they can route the beam to exit from any location the fibers connect to.
The only time tissue gets exposed to the laser is at the exit point, which could be a specialized port, either a physical or biological lens. From the outside, it might not look like anything but a tiny reflective dot on their skin.
