Enhanced stimulated Brillouin scattering in tellurite covered silicon nitride waveguides via geometric and cladding engineering

We measure Brillouin-scattering in geometrically and cladding engineered tellurite covered silicon nitride waveguide in which we report gain values of 80.9 m –1 W –1 and 76.3 m –1 W –1 , a 150 times improvement over previous silicon nitride based waveguides.