Low Propagation Loss of Single-Mode Planar Waveguides on MgF Crystals


The single-mode planar waveguides were fabricated on MgF2 crystals by half dozen.0 MeV carbon ion implantation with the fluence of $1 times ten^15$ ions/cm2. The guiding modes were measured by the prism-coupling technique at the wavelength of 632.eight nm. The near-field intensity distributions were obtained by the end-face coupling technique, and the simulation of the light propagation method was performed simultaneously for comparison. The thermal stability was investigated by annealing treatment at totally different temperatures ranging from 260 °C to 400 °C in air. Once suitable annealing, the minimum propagation loss of the waveguide will be reduced to zero.4 dB/cm.

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