Abstract
The fabrication and characterization of a planar waveguide are reported in NdLiP 4O 12 crystal which can be used for low-threshold, miniature laser. The photoluminescence (PL) measurement shows that there are three peaks around 0.911, 1.077 and 1.366 μm for bulk NdLiP 4O 12. Rutherford backscattering/channeling has been used to check the composition and quality of NdLiP 4O 12 crystal. A waveguide laser in NdLiP 4O 12 crystal is formed with MeV He ions. The refractive index profiles, n x , n y and n z in NdLiP 4O 12 waveguide are given. The changes of refractive index profiles n x , n y and n z are 6.11%, 6.51% and 9.37%, respectively. The refractive index change strongly depends on the crystal structure.
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