In this work a study of the effects on the optical properties of channel waveguides in Nd:YAG crystals fabricated with
different proton implantations doses is presented. The channel structure was achieved by using an electroformed mask
with openings through which the protons were implanted. The optical properties studied included microphotographs, the
transversal modal distribution at visible wavelengths, the photoluminescence spectra and the laser emission. The laser
performance of the waveguides was obtained in a resonant cavity configuration with mirrors held onto the polished end
faces of the waveguides.
In this work we present the laser performance of channel waveguides which operate at 1064 nm at
room temperature. These channels were made on Nd: YAG crystal by proton implantation with different widths (10, 15
and 20 μm) forming sets of 10 waveguides which are separated by a distance of 215 μm. The results shown are
transversal mode distribution, propagation losses, absorption and luminescence spectra and laser emission characteristics
such as pump power threshold and slope efficiency. The spectroscopic characterization indicates that the optical
properties of the waveguide in comparison with the bulk material are preserved after the implantation process and that
this is a potential technique to develop compact and efficient lasers.