| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Evanescent field | Business | In a waveguide, a time-varying field having an amplitude that decreases monotonically as a function of transverse radial distance from the waveguide, but without an accompanying phase shift. Note 1: The evanescent field is coupled, i.e., bound, to an electromagnetic wave or mode propagating inside the waveguide. Note 2: The evanescent field is a surface wave. Note 3: In fiber optics, the evanescent field may be used to provide coupling to another fiber. (references) | |
| Evanescent field | Post & Telecom | Time varying electromagnetic field whose amplitude decreases monotonically, but without an accompanying phase shift, in a particular direction is said to be evanescent in that direction. Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
