Octave spanning infrared supercontinuum generation in direct laser written waveguide

A depressed cladding waveguide, written by the femtosecond laser beam in the dry tellurite 70TeO
₂
- 22WO
₃
- 8Bi
₂
O
₃
glass allows obtaining octave-spanning supercontinuum in the 1.5 - 3.4 μm range under pumping at 2.2 μm by 260 fs pulses. Theoretical simulations of nonlinear propagation of the ultrashot pulses are in good agreement with experimental results.