Experimental findings show over 18 dB optical gain in lithium niobate waveguides, suggesting potential for efficient nanophotonic applications.
We exploit quadratic modulation instability in a periodically poled lithium niobate nanophotonic waveguide to achieve broadband optical amplification. A high on-chip gain exceeding 18 dB is obtained with a pump peak power below 1.5 W.
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Han et al. (2025) studied this question.
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