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Efficient sum-frequency generation of yellow laser in a thin-film lithium niobate waveguide
Optics Letters- received 03/05/2024; accepted 04/15/2024; posted 04/16/2024; Doc. ID 522924
- Abstract: Yellow laser with high efficiency and safety plays an essential role in many applications such as biomedicine. Here, we demonstrate the sum-frequency generation (SFG) of yellow light on a periodically poled thin-film lithium niobate (PP-TFLN) waveguide. Taking advantage of large χ(2) nonlinearity, a high normalized conversion efficiency of 10097%/(W·cm²) is obtained with pump wavelengths of 1317.7nm and 1064nm. An absolute conversion efficiency of 20.67% is recorded with on-chip pump powers of 10.4dBm (1317.7nm) and 14.5dBm (1064nm).