- 行业: Telecommunications
- Number of terms: 29235
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In an optical fiber, the variation in propagation delay that occurs because of the different group velocities of different modes. Synonym multimode group delay.
Industry:Telecommunications
In an optical waveguide operating at a given wavelength, the number of modes supported, and their propagation time differences.
Industry:Telecommunications
In an optical source or detector, the slope of the curve relating output quanta to input quanta.
Industry:Telecommunications
In an optical source or detector, the ratio of the number of output quanta to the number of input quanta. Note: Input and output quanta need not both be photons.
Industry:Telecommunications
In an optical fiber, the variation in propagation delay that occurs because of the different group velocities of different modes. Synonym multimode group delay.
Industry:Telecommunications
In an optical fiber, anything used to convert cladding modes to radiation modes, thus removing them from the fiber. Note: In practice, the fiber's polymer overcoat (which is also used to protect it from mechanical damage and to isolate it optically from other fibers) is used as a cladding mode stripper. The refractive index of the coating material is made to be slightly higher than that of the cladding. This forces optical energy in the cladding modes to radiate into the relatively lossy coating, from which it quickly dissipates.
Industry:Telecommunications
In an optical fiber, the variation in attenuation among the propagating modes.
Industry:Telecommunications
In an optical fiber, the propagation constant evaluated along the optical axis of the fiber in the direction of transmission. Note: The real part of the axial propagation constant is the attenuation constant. The imaginary part is the phase constant.
Industry:Telecommunications
In an optical fiber, the optical power loss caused by a microbend.
Industry:Telecommunications
In an optical fiber, the distance between the center of the two concentric circles that specify the cladding diameter and the center of the two concentric circles that specify the core diameter. Note: The concentricity error is used in conjunction with tolerance fields to specify or characterize optical fiber core and cladding geometry. Synonyms core eccentricity, core-to-cladding concentricity, core-to-cladding eccentricity, core-to-cladding offset.
Industry:Telecommunications
