Direct writing of guided wave devices inside bulk glass using femtosecond lasers

We review femtosecond laser-direct write inscription of guided wave structures in bulk glass and discuss our recent demonstrations of a range of 2and 3-D photonic devices using this technique. Figure 1: Schematic of the perpendicular writing method used to inscribe waveguides in bulk glass. The components are A: 150fs Ti:Sapphire laser, B: in-line camera, C: variable slit for beam shaping, D: 20x objective lens and E: a bulk glass sample.