We present z-propagation single-mode Ti: Er: Tm: LiNbO3 strip waveguides on X-Cut congruent LiNbO3 substrate. The
waveguide has been fabricated by a technological process, starting with the preparation of the Er3+/Tm3+codoped
LiNbO3plate, followed by the fabrication of 8-μm-wide Ti-diffused strip waveguide. The results of surface refractive
indices by employing prism coupling technique shows Er3+/Tm3+codoped have no effects on the substrate index, and the
surface composition was evaluated from the measured indices with the help of Sellmeier equation. We demonstrated the
amplified simultaneous emission (ASE) spectra from the waveguide pumped at 980nm and 795nm without optical
damage observed. The results shows that the co-doping combines the laser property of both ions, and the emission band
around 1.5μm is about 150 nm, as a result, opening up a series of possibilities for stable, broadband amplifier devices by
employing pump sources under 980nm and 795nm laser diodes.
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