Luminescence spectroscopy of Nd3+in ion-implanted LiNbO:Nd:MgO planar waveguides

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Abstract
We report high-resolution room and low-temperature photoluminescence measurements of Nd3+ ions in LiNbO3:Nd:MgO planar waveguides fabricated by the ion implantation technique. Our study is centred on the spectral region associated with the 4F3/2 to 4I11/2 laser transition and the 4F3 to 4I9/2 transition. Site-selective spectroscopic techniques have also been used and lifetime measurements are reported. Comparison of the bulk and waveguide data reveals only minor changes in the spectroscopic properties of Nd3+ ions in the waveguide. This encouraging fact suggests the preservation of the host matrix crystallinity, confirming ion implantation as a good method for fabricating waveguide lasers.