Absorption spectra, near-field intensity and microscopic cross section of RbTiOPO4 channel waveguide formed by ion implantation

► The refractive index enhanced channel waveguide in RbTiOPO4 has been fabricated. ► The absorption spectra show that there are fewer point defects in the waveguide region. ► The bright near field intensity distribution of the transverse-electric mode was collected. ► The loss of the channel waveguide was measured to be 1.7 dB/cm. ► The light propagation in the waveguide was simulated.