Difference-Frequency Generation in Lithium-Niobate-on-Insulator Waveguide Based on Modal Phase Matching(Invited)
Difference-frequency generation enables optical nonlinear-wavelength conversion and is vital for generating coherent light at long wavelengths.In this study,we demonstrate modal-phase-matched difference-frequency generation on a thin-film lithium-niobate platform.By varying the wavelength of the signal light,difference-frequency generation is realized across the entire spectrum of the signal laser.In addition,by manipulating the power of the signal light coupled into the waveguide,an on-chip conversion efficiency of 188%·W-1 is achieved.Experimental results show that the proposed method is promising for multiwavelength frequency conversion in optical communication and future all-optical communication networks.
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