- 産業: Telecommunications
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In an optical fiber, the angle formed by the extreme bound meridional rays accepted by the fiber, or emerging from it, equal to twice the acceptance angle; the angle formed by the largest cone of light accepted by the fiber or emitted from it.
Industry:Telecommunications
In an optical fiber, that loss attributable to macrobending. Synonym curvature loss.
Industry:Telecommunications
In an optical fiber, distortion caused by dispersion, such as material or profile dispersion, of a given propagating mode.
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, an undesired decrease in the refractive index at the center of the core. Note: An index dip is an artifact of certain manufacturing processes. Synonym profile dip.
Industry:Telecommunications
In an optical fiber, an undesired decrease in the refractive index at the center of the core. Note: An index dip is an artifact of certain manufacturing processes. Synonym profile dip.
Industry:Telecommunications
In an optical fiber, a ray that is confined primarily to the core. Note: A guided ray satisfies the relation given by #f21 where r is the angle the ray makes with the fiber axis, r is the radial position, i.e., radial distance, of the ray from the fiber axis, nr is the refractive index at the radial distance r from the fiber axis, and na is the refractive index at the core radius, a, i.e., at the core-cladding interface. Guided rays correspond to bound modes, i.e., guided modes, in terms of modes rather than rays. Synonyms bound ray, trapped ray.
Industry:Telecommunications
In an optical fiber, a ray that is confined primarily to the core. Note: A guided ray satisfies the relation given by #f21 where r is the angle the ray makes with the fiber axis, r is the radial position, i.e., radial distance, of the ray from the fiber axis, nr is the refractive index at the radial distance r from the fiber axis, and na is the refractive index at the core radius, a, i.e., at the core-cladding interface. Guided rays correspond to bound modes, i.e., guided modes, in terms of modes rather than rays. Synonyms bound ray, trapped ray.
Industry:Telecommunications
In an optical fiber, a ray for which geometric optics would predict total internal reflection at the boundary between the core and the cladding, but which suffers loss by virtue of the curved core boundary. Note: Leaky rays correspond to leaky (i.e., tunneling) modes in the terminology of mode descriptors. Synonym tunneling ray.
Industry:Telecommunications
In an optical fiber, a ray for which geometric optics would predict total internal reflection at the boundary between the core and the cladding, but which suffers loss by virtue of the curved core boundary. Note: Leaky rays correspond to leaky (i.e., tunneling) modes in the terminology of mode descriptors. Synonym tunneling ray.
Industry:Telecommunications
