电磁场的迭加原理可使波导的正交模起并行信息通道作用。即使通道的载频相同,这些通道也能保持互不相关。如果波导有效截面积 A 远大于传输波长λ,那么并行通道数就近似为(A/λ)~2。由于这种性能,可用波导传送多元图象或图片。事实是,用多模光波导传送图象比较简单,因为某些这样的波导(包括许多光纤)有一种值得注意的能力,即能在一系列分立的点(Z_3>0)上自动产生波导输入处(Z=0)的二维图象。由于这种性能,有可能将多模波 The superposition principle of the electromagnetic field can make the orthogonal mode of waveguide play the role of parallel information channel. Even if the channel's carrier frequency is the same, these channels also remain unrelated. If the waveguide effective cross-sectional area A is much larger than the transmission wavelength λ, then the number of parallel channels is approximately (A / λ) ~ 2. Because of this capability, waveguides can be used to transmit multivariate images or pictures. The fact is that the transmission of images with multimode optical waveguides is relatively straightforward, as some such waveguides, including many optical fibers, have the remarkable capability of automatically generating waveguide input at a series of discrete points (Z_3> 0) (Z = 0) two-dimensional image. Due to this performance, it is possible to multimode wave