Abstract

The polarization-resolved emission spectra of the ${ }^4{I}_{13/2}\iff { }^4{I}_{15/2},$ ${ }^4{I}_{11/2}\iff { }^4{I}_{15/2},$ and ${ }^4{S}_{3/2}{+}^2{H}_{11/2}\iff { }^4{I}_{15/2}$ transitions have been measured in situ on an $\mathrm{Er}:\mathrm{Ti}:{\mathrm{LiNbO}}_3$ waveguide and used to determine the polarization-resolved emission and absorption cross-section distributions of these transitions. The significant differences caused by the ${\mathrm{Er}}^{3+}$-ion anisotropic environment may have important implications for optimizing $\mathrm{Er}:{\mathrm{LiNbO}}_3$ integrated devices.

© 2002 Optical Society of America

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