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Exploring the impacts of long-period corrugation and phase gratings on a cascade of phase-shifted lithium niobate waveguides with the combined theoretical and experimental approaches
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Paper Abstract

Highly reliable and low-cost long-period corrugation and phase gratings based on a cascade of phase-shifted lithium niobate waveguides are theoretically analyzed, experimentally realized and characterized in a logical sequence. The realization of these phase-shifted waveguide gratings (LPWG) is subsequently achieved via a two-step proton exchange method. The measurement results have demonstrated that the maximum dip contrast is up to 19.73 dB and the narrowest full-width-at-half-maximum (FWHM) is close to 2.34 nm. Furthermore, for the cascaded pi-phase-shifted long-period waveguide gratings (LPWG), the two resonance wavelengths are symmetrically shifted away from the center wavelength in response to an increase in the number of LPWG sections incorporated.

Paper Details

Date Published: 26 February 2019
PDF: 7 pages
Proc. SPIE 10912, Physics and Simulation of Optoelectronic Devices XXVII, 1091216 (26 February 2019); doi: 10.1117/12.2507560
Show Author Affiliations
Ricky W. Chuang, National Cheng Kung Univ. (Taiwan)
Yu-Chun Huang, National Cheng Kung Univ. (Taiwan)
Yao-Jen Lee, Taiwan Semiconductor Research Institute (Taiwan)


Published in SPIE Proceedings Vol. 10912:
Physics and Simulation of Optoelectronic Devices XXVII
Bernd Witzigmann; Marek Osiński; Yasuhiko Arakawa, Editor(s)

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