论文部分内容阅读
单模耦合器由标准单模光纤(芯径8～10μm,包层125μm)制成。单模耦合器和多模耦合器之间的耦合理论是不一样的。单模耦合基于损耗波耦合,而多模耦合则基于光传输,所以多模耦合器与波长无关,而单模耦合器与波长有关。当波长变化时,单模耦合器的分光比也会变化。例如,在1310nm波长时耦合比为50:50,当波长变到1350nm时,耦合比有可能变到70:30。这在许多应用中可能是一个问题,这是因为单模通信
Single-mode coupler consists of standard single-mode fiber (core diameter 8 ~ 10μm, cladding 125μm) made. The coupling theory between single-mode couplers and multi-mode couplers is not the same. Single-mode coupling is based on loss-wave coupling while multi-mode coupling is based on optical transmission, so multi-mode couplers are wavelength-independent whereas single-mode couplers are wavelength dependent. When the wavelength changes, the single-mode coupler splitting ratio will change. For example, the coupling ratio is 50:50 at a wavelength of 1310 nm, and the coupling ratio is likely to change to 70:30 when the wavelength is changed to 1350 nm. This can be a problem in many applications because of single-mode communication