Lithium–Niobate Channel Waveguide for the Realization of Long-Period Gratings |
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Authors: | Jin W Chiang KS Liu Q Chow CK Chan HP Lor KP |
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Affiliation: | Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong; |
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Abstract: | We propose a special lithium-niobate (LiNbO3) single-mode waveguide for the realization of long-period gratings, which consists of a channel core embedded in a thin slab cladding. We fabricated the waveguide on a z-cut LiNbO3 substrate with a two-step proton-exchange process and demonstrated its suitability for grating application with a number of removable photoresist long-period gratings deposited on the waveguide surface. The waveguide fabrication process and the LiNbO3 waveguide structure could be further explored for the development of electrooptic gratings for high-speed applications. |
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