Figure 4

Output spectra of the Ta₂O₅ waveguide for the TE₁₀ mode (in blue) and TM₁₀ mode (in red and in black) with various peak powers coupled to the waveguide. These peak powers estimated by TM₁₀ modes are 113 W, 225 W, 338 W, 450 W and 563 W, respectively. The spectra for TE₁₀ mode is measured in the waveguide of 1500 nm width (in blue) and the spectra for TM₁₀ mode is measured in waveguides of 1500 nm (in red) and 1400 nm (in black) widths.