Opt Lett. 2018 Jun 15;43(12):2965-2968. doi: 10.1364/OL.43.002965.
We report a wideband optical parametric amplification (OPA) over 14 THz covering telecom S, C, and L bands with observed maximum parametric gain of 38.3 dB. The OPA is realized through cascaded second-harmonic generation and difference-frequency generation (cSHG-DFG) in a 2 cm periodically poled LiNbO (PPLN) waveguide. With tailored cross section geometry, the waveguide is optimally mode matched for efficient cascaded nonlinear wave mixing. We also identify and study the effect of competing nonlinear processes in this cSHG-DFG configuration.
我们报告了一种覆盖电信 S、C 和 L 波段的 14THz 以上的宽带光参量放大（OPA），观察到的最大参量增益为 38.3dB。OPA 通过在 2cm 周期极化铌酸锂（PPLN）波导中的级联二次谐波产生和差频产生（cSHG-DFG）实现。通过对横截面几何形状的精心设计，该波导在高效级联非线性波混合方面实现了最佳模式匹配。我们还在这种 cSHG-DFG 配置中识别并研究了竞争非线性过程的影响。
