本文提出并演示了一种由可用光写入或擦去的二维光折射率图形构成的新型光波导器件。这种可程序光波导器件综合利用硅酸铋的三种物理性能,即:大电光效应,与波长密切相关的光电导效应和具有长载流子俘获时间的高暗电阻率。 This paper presents and demonstrates a novel optical waveguide device consisting of a two-dimensional optical refractive index pattern that can be written or erased with light. This programmable optical waveguide device utilizes three physical properties of bismuth silicate, namely, a large electro-optic effect, a photoconductive effect closely related to a wavelength, and a high dark resistivity with a long carrier-trapping time.