1. Composition, optical properties and diffusion characteristics of gallium-diffused lithium niobate optical thin-film.
- Author
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Piao, Rui-Qi, Zhang, Chi, Xu, Qing, Zhang, Zi-Bo, Zhang, De-Long, and Yang, Xiao-Fei
- Subjects
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GALLIUM , *OPTICAL properties , *FABRICATION (Manufacturing) , *GAUSSIAN function , *LITHIUM niobate , *DIFFUSION - Abstract
Abstract Gallium-diffused lithium niobate (LiNbO 3) channel optical thin-film was fabricated by diffusion of photolithographically patterned gallium-oxide stripes on a Z-cut congruent LiNbO 3 substrate. Composition, optical properties of the channel thin-film and gallium diffusion profiles were characterized. The results show that the thin-film is in congruent composition environment, confines single-mode ordinary and extraordinary waves with a loss <0.5 dB/cm at 1.5 μm wavelength. The confined mode field follows Gaussian/Hermite-Gaussian profile in the width/depth direction of the channel thin-film, and shows definite anisotropy. The diffused gallium ions follow a sum of two error functions in the width and a Gaussian function in the depth direction of the channel optical thin-film. Two-dimensional gallium concentration and refractive index profiles in the channel thin-film are modeled. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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