研究了高斯光束在外加空间调制电场的光折变晶体中的演化, 结果表明, 在不同的外加调制电场作用下高斯光束的光场分布会随着外电场变化而被调制。重点研究了同相位和反相位以及相位差为π/2的高斯光束在外加空间调制电场的光折变晶体中的相互作用, 在外加空间分布线性增加电场作用下出现了许多新的实用特性, 通过调整外加电场分布, 可以让两同相位相干光靠得更近而不发生融合, 也可以让两靠得很近的反相位光束可控偏转, 还可以控制相位差为π/2的两相干光束进行能量转移。这种连续变化的电场可以用阶梯分布的电场替代, 为工程实现提供了可能。

The evolution of Gaussian beams in photorefractive crystal biased by spatial modulation electric filed is investigated. The results show that the filed distribution of the Gaussian beams is modulated and varies with the applied external field. The interactions of the beams with same-phase, anti-phase and phase difference of π/2 in the photorefractive crystal are studied emphatically. Many novel and practical properties are found when the distribution of applied external field is linearly increased. By adjusting the distribution of external electric field, one can make the separation of the same-phase beams closer without mergence, deflection of the anti-phase beams and power transfer of the beams with phase difference of π/2 controllable. In simulation, it is found that the linearly increased field distribution can be substituted by a stopped one, so it is possible to realize it in engineering.