Friis S M M, Begleris I, Jung Y, Rottwitt K, Petropoulos P, Richardson D J, Horak P, Parmigiani F
Opt Express. 2016 Dec 26;24(26):30338-30349. doi: 10.1364/OE.24.030338.
We demonstrate efficient four-wave mixing among different spatial modes in a 1-km long two-mode fiber at telecommunication wavelengths. Two pumps excite the LP and LP modes, respectively, while the probe signal excites the LP mode, and the phase conjugation (PC) and Bragg scattering (BS) idlers are generated in the LP mode. For these processes we experimentally characterize their phase matching efficiency and bandwidth and find that they depend critically on the wavelength separation of the two pumps, in good agreement with the numerical study we carried out. We also confirm experimentally that BS has a larger bandwidth than PC for the optimum choice of the pump wavelength separation.
我们展示了在1公里长的电信波长双模光纤中不同空间模式之间高效的四波混频。两个泵浦分别激发LP₀₁和LP₁₁模式，而探测信号激发LP₀₁模式，并且在LP₀₁模式中产生相位共轭（PC）和布拉格散射（BS）闲频光。对于这些过程，我们通过实验表征了它们的相位匹配效率和带宽，发现它们严重依赖于两个泵浦的波长间隔，这与我们进行的数值研究结果高度一致。我们还通过实验证实，对于泵浦波长间隔的最佳选择，BS的带宽比PC的带宽更大。
