中国激光, 2021, 48 (3): 0312002, 网络出版: 2021-02-02
原子介质中的近共振增益光栅 
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Nearly-Resonant Gain Grating in Atomic Media
图 & 表
图 1. 原子系统的能级结构及场与原子系统间的位置关系。(a) N型四能级原子系统的能级结构;(b)探测场、耦合场和调制场与原子系统的位置关系,零阶、一阶和二阶衍射方向标于图中
Fig. 1. Energy level structure of atomic system and position relation between fields and atomic system. (a) Four-level N-type atomic system; (b) spatial configuration of probe, modulation, and coupling fields with respect to atomic sample in which zeroth-order, first-order and second-order diffraction directions are indicated
图 2. 当Δc=0,Δm=0.68γ,Δp=-0.05γ,Ωc=0.27γ,Ωm=0.35γ,L=140z0时探测场的传输函数及相应的衍射强度。(a)探测场传输函数的振幅和相位随x的变化;(b)不同相位调制条件下衍射强度随sin θ的变化;(c) 图2 (b)中零阶衍射强度大于1.0的部分
Fig. 2. Transmission function and corresponding diffraction intensity of probe field when Δc=0, Δm=0.68γ, Δp=-0.05γ, Ωc=0.27γ, Ωm=0.35γ, and L=140z0 . (a) Amplitude and phase of transmission function of probe field versus x; (b) diffraction intensity versus sin θ under different phase modulation conditions; (c) part with zeroth-order diffraction int
图 3. 当Δc=0,Δm=0.68γ,Δp=-0.05γ,L=140z0时Im(χ)随调制场拉比频率和耦合场拉比频率的变化。(a) Im(χ)随调制场拉比频率的变化;(b) Im(χ)随耦合场拉比频率的变化
Fig. 3. Im (χ) versus Rabi frequencies of modulation field and coupling field when Δc=0, Δm=0.68γ, Δp=-0.05γ, and L=140z0. (a) Im (χ) versus Rabi frequency of modulation field; (b) Im (χ) versus Rabi frequency of coupling field
图 4. 当Δc=0,Δm=0.68γ,Δp=-0.05γ,L=140z0 时高阶衍射强度随Ωc和Ωm的变化。(a)一阶衍射强度;(b)二阶衍射强度;(c)三阶衍射强度
Fig. 4. High-order diffraction intensity versus Ωc and Ωm when Δc=0, Δm=0.68γ, Δp=-0.05γ, and L=140z0.(a) First-order diffraction intensity; (b) second-order diffraction intensity; (c) third-order diffraction intensity
图 5. 当Δc=0,Ωc=0.27γ,Ωm=0.33γ,L=140z0时高阶衍射强度随Δp和Δm的变化。(a)一阶衍射强度;(b)二阶衍射强度;(c)三阶衍射强度
Fig. 5. High-order diffraction intensity versus Δp and Δm when Δc=0, Ωc=0.27γ, Ωm=0.33γ, and L=140z0. (a) First-order diffraction intensity; (b) second-order diffraction intensity; (c) third-order diffraction intensity
董雅宾, 庞嘉璐, 杨丽, 刘瑶瑶. 原子介质中的近共振增益光栅[J]. 中国激光, 2021, 48(3): 0312002. Yabin Dong, Jialu Pang, Li Yang, Yaoyao Liu. Nearly-Resonant Gain Grating in Atomic Media[J]. Chinese Journal of Lasers, 2021, 48(3): 0312002.
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