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Room-temperature waveguide photoluminescence spectrum of the transition of ions in the -doped films, obtained by exciting the mode at . The inset shows the single exponential decay curve of the level.
Profilometer scan of the film surface in direction transversal to a channel waveguide obtained by UV imprinting through a wide opening of an intensity mask. The densification of the film produced by the exposure can be clearly seen in the inset, showing the 3D map of a area around a portion of the waveguide.
Measured near field intensity distribution at of a channel waveguide obtained by UV imprinting through a wide opening. The intensity contour lines (solid lines), corresponding to 0.2, 0.4, 0.6, and 0.8 times the maximum field intensity value, matched well the calculated ones (dashed lines).
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