Unlike multi-mode optical fiber, single-mode fiber does not exhibit modal dispersion. Modes are the possible solutions of the Helmholtz equation for waves, which is obtained by combining. This phenomenon occurs because the core is constructed from glass with a higher refractive index than the surrounding cladding material. Higher-order modes like LP 11, LP 20 etc. Note that in most cases light with different polarization states can be guided. The term “single-mode” ignores. We'll cover single mode, multimode, and armored fiber cables below. Single mode fiber optic cable is made up of a small diameter glass or plastic core surrounded by cladding, which is a layer of reflective material. This characteristic allows for significantly less signal degradation and higher data rates over.