Laser Direct Writing Wave Guide

When femtosecond laser pulses are tightly focused inside a transparent material, nonlinear absorption happens only at the focal point. This creates a permanent, localized change in refractive index without affecting the surface or the surrounding material. By moving the focus through the glass, optical waveguides can be written directly inside the substrate in true three dimensions. This enables photonic circuits that are difficult or impossible to fabricate with conventional planar lithography.

SuperbIN’s Equipment Integration Division accepts contract development projects for femtosecond laser waveguide writing in glass. Drawing on our ultrafast laser processing experience, optical process R&D team, and in-house motion and control engineering, we work with customers to develop waveguide structures for their specific materials, wavelengths, and device designs, from early feasibility studies through to process transfer.