Wang Jian, Sun Junqiang, Lou Chuanhong, Sun Qizhen
Opt Express. 2005 Sep 19;13(19):7405-14. doi: 10.1364/opex.13.007405.
All-optical wavelength conversion between ps-pulses based on cascaded sum- and difference frequency generation (SFG+DFG) is proposed and experimentally demonstrated in periodically poled LiNbO3 (PPLN) waveguides. The signal pulse with 40-GHz repetition rate and 1.57- ps pulse width is adopted. The converted idler wavelength can be tuned from 1527.4 to 1540.5nm as the signal wavelength is varied from 1561.9 to 1548.4nm. No obvious changes of the pulse shape and width, also no chirp are observed in the converted idler pulse. The results imply that single-to-multiple channel wavelength conversions can be achieved by appropriately tuning the two pump wavelengths.
基于级联和频与差频产生（SFG+DFG）的皮秒脉冲间全光波长转换在周期性极化铌酸锂（PPLN）波导中被提出并通过实验验证。采用了重复频率为40GHz、脉冲宽度为1.57皮秒的信号脉冲。当信号波长从1561.9nm变化到1548.4nm时，转换后的闲频波长可从1527.4nm调谐到1540.5nm。在转换后的闲频脉冲中未观察到脉冲形状和宽度的明显变化，也未观察到啁啾。结果表明，通过适当调谐两个泵浦波长可实现单通道到多通道的波长转换。
