A) tunable wavelength conversion between picosecond pulses is experimentally demonstrated by using the cascaded sum-and difference-frequency generation(cSFG/DFG) in a periodically poled LiNbO_3(PPLN) waveguide.

• 实验研究了周期域反转铌酸锂光波导级联和频与差频二阶非线性效应(cSFG/DFG)皮秒脉冲间的可调谐波长转换。