中文摘要：

利用周期性畴反转铌酸锂光波导级联和频与差频的二阶非线性效应，提出并实验验证了一种新颖的基于无源光波导双环腔结构的可调谐全光波长转换方案，实现了皮秒脉冲从信号光波长到空闲光波长的转换．采取的脉冲信号光脉宽为1．57ps，重复频率为40GHz，抽运光和控制光由双环腔激光器提供，无需任何外界注入连续光．

英文摘要：

Exploiting the cascaded sum- and difference-frequency generation in a periodically poled lithium niobate （PPLN） waveguide, a novel scheme of tunable all-optical wavelength conversion is proposed and experimentally demonstrated by use of a PPLN-based double-ring cavity configuration. Wavelength conversion of picosecond pulses from the signal wavelength to the idler wavelength is realized. A pulsed signal source with a repetition rate of 40 GHz and a pulse width of 1.57 ps is adopted. The pump and control waves are generated from the double-ring fiber laser. Therefore, no external continuous-wave （CW） light is required.