Nondegenerate Four Wave Mixing in Rare-Earth Doped Fiber Under the Influence of Coherent Population Trapping
GUO Yang1,2, MING Hai1,2, LIU Fang-Xin3, XU Li-Xin1,2
1Structure Research Laboratory, 2Department of Physics, 3Department of Astronomy and Applied Physics, University of Science and Technology of China, Hefei 230026
Nondegenerate Four Wave Mixing in Rare-Earth Doped Fiber Under the Influence of Coherent Population Trapping
1Structure Research Laboratory, 2Department of Physics, 3Department of Astronomy and Applied Physics, University of Science and Technology of China, Hefei 230026
Abstract： By applying a strong coupling field between a lower state and the upper state of an allowed transition to ground, an enhancement of nondegenerate four wave mixing (NDFWM) with a resonantly enhanced third-order nonlinear susceptibility in a rare-earth doped fiber can be obtained. We have derived an expression for the third-order non-linear susceptibility using quantum theory and discussed the conversion efficiency for NDFWM. The theoretical result shows that the conversion efficiency has a maximum value while the third-order nonlinear susceptibility shows constructive interference at the Rabi frequency Ω23 =±√Г2Г3. On account of phase-mismatch, the frequency conversion efficiency has a maximum value over a certain small range of frequency separation (such as 0 < Δf < 30 GHz at the wavelength λc = 1.55 μm), and the frequency conversion range increases with increase of the third-order nonlinear susceptibility.
(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
引用本文:
GUO Yang;MING Hai;LIU Fang-Xin;XU Li-Xin;. Nondegenerate Four Wave Mixing in Rare-Earth Doped Fiber Under the Influence of Coherent Population Trapping[J]. 中国物理快报, 2000, 17(4): 275-276.
GUO Yang, MING Hai, LIU Fang-Xin, XU Li-Xin,. Nondegenerate Four Wave Mixing in Rare-Earth Doped Fiber Under the Influence of Coherent Population Trapping. Chin. Phys. Lett., 2000, 17(4): 275-276.
2000, Vol. 17 
