Dr. Wenbao Sun Profile

Dr. Wenbao Sun

at Tianjin Univ

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Proceedings Article | 1 August 2017 Paper

Z-propagation Ti: Er: Tm: LiNbO3 strip waveguide with Er3+/Tm3+ codoped

Wenbao Sun, Xiaofei Yang, Ruiqi Piao, Delong Zhang

Proceedings Volume 10339, 1033926 (2017) https://doi.org/10.1117/12.2271128

KEYWORDS: Waveguides, Titanium, Erbium, Thulium, Refractive index, Semiconductor lasers, Photonic crystals, Prisms, Optical damage, Ions

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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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