| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Broadband and efficient second harmonic generation in LiNbO3-LiTaO3 composite ridge waveguides at telecom-band |
| Xin-Tong Zhang(张欣桐)† |
| Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei 230026, China |
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Abstract Broadband nonlinear frequency conversions of optical waves are widely employed in multiple areas of optics and photonics. However, the broadening of conversion bandwidth is often at a cost of reduction in efficiency, which may induce a limitation on practical applications. Here we theoretically propose a novel design of LiNbO3 ridge waveguides on LiTaO3 substrates which can be used for efficient and broadband second harmonic generation. Through group velocity engineering of the ridge waveguides, acceptance bandwidth over 20 nm with a high conversion efficiency of >25%W -1cm -2 is achieved at telecom-band.
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Received: 18 May 2020
Revised: 22 June 2020
Accepted manuscript online: 25 August 2020
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PACS:
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42.65.-k
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(Nonlinear optics)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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42.65.Wi
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(Nonlinear waveguides)
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42.25.-p
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(Wave optics)
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Corresponding Authors:
†Corresponding author. E-mail: zhxtong@mail.ustc.edu.cn
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Cite this article:
Xin-Tong Zhang(张欣桐) Broadband and efficient second harmonic generation in LiNbO3-LiTaO3 composite ridge waveguides at telecom-band 2021 Chin. Phys. B 30 014205
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