We report the fabrication of ion-exchanged channel waveguides in an Er-doped Na-modified BK-7 glass. The buried waveguides were elliptical in cross section, having approximate cross-sectional dimensions of 10 microm x 30 microm. Characterization of the optical properties of the waveguides revealed that they are single mode in the 10-microm dimension and multimode in the 30-microm dimension and exhibit a total waveguide loss, absorption plus scattering, of 0.8 dB/cm at 0.633 microm.
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ABOU‐EL‐LEIL et al. (1991) studied this question.
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