论文标题
基于频率脱换的四波混合过程的多个空间和波长转换操作在分级索引6-lp几种模式光纤中
Multiple spatial and wavelength conversion operations based on a frequency-degenerated intermodal four-wave-mixing process in a graded-index 6-LP few mode fiber
论文作者
论文摘要
我们报告了在6-LP模式分级折射率纤维中进行的电信波长时同时观察三倍波长和空间转换过程的实验性观察。物理机制基于平行和相匹配的频率偏好的联运四波混合（FD-IFWM）现象，该现象发生在基本模式和高阶空间模式之间。更确切地说，单个高功率频率恢复的泵波同时注入四种空间模式LP01，LP11，LP02和LP31中的1.8公里长的级数索引纤维，以及三个独立的信号。通过三个并行相匹配的FD-IFWM相互作用，这些初始信号随后在空间上同时进行，并将频率从基本模式转换为特定的高阶模式。还研究了差异模态延迟的影响，并表明空间多路复用信号之间的散步显着限制了电信应用程序转换过程的带宽。
We report on the experimental observation of a simultaneous threefold wavelength and spatial conversion process at telecommunication wavelengths taking place in a 6-LP-mode graded-index few-mode fiber. The physical mechanism is based on parallel and phase-matched frequency-degenerated intermodal four-wave mixing (FD-IFWM) phenomena occurring between the fundamental mode and higher-order spatial modes. More precisely, a single high-power frequency-degenerated pump wave is simultaneously injected in the four spatial modes LP01, LP11, LP02 and LP31 of a 1.8-km long graded-index few-mode fiber together with three independent signals in the fundamental mode. By means of three parallel phase-matched FD-IFWM interactions, these initial signals are then simultaneously spatially and frequency converted from the fundamental mode to specific high-order modes. The influence of the differential modal group delay is also investigated and shows that the walk-off between the spatially multiplexed signals significantly limits the bandwidth of the conversion process for telecom applications.
