- 産業: Telecommunications
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ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
An optical fiber composed of a silica-based core and cladding. Note: The presence of a protective polymer overcoat does not disqualify a fiber as an all-silica fiber, nor does the presence of a tight buffer. Synonym all-glass fiber.
Industry:Telecommunications
An optical fiber construction, usually a single-mode fiber, that has an outer cladding of approximately the same refractive index as the core, and an inner cladding of very low (depressed) refractive index material between them.
Industry:Telecommunications
An optical fiber in which only the lowest order bound mode can propagate at the wavelength of interest. Note 1: The lowest order bound mode is ascertained for the wavelength of interest by solving Maxwell's equations for the boundary conditions imposed by the fiber, e.g., core (spot) size and the refractive indices of the core and cladding. Note 2: The solution of Maxwell's equations for the lowest order bound mode will permit a pair of orthogonally polarized fields in the fiber, and this is the usual case in a communication fiber. Note 3: In step-index guides, single-mode operation occurs when the normalized frequency, V, is less than 2. 405. For power-law profiles, single-mode operation occurs for a normalized frequency, V, less than approximately where g is the profile parameter. Note 4: In practice, the orthogonal polarizations may not be associated with degenerate modes. Synonyms monomode optical fiber, single-mode fiber, single-mode optical waveguide, unimode fiber.
Industry:Telecommunications
An optical fiber in which only the lowest order bound mode can propagate at the wavelength of interest. Note 1: The lowest order bound mode is ascertained for the wavelength of interest by solving Maxwell's equations for the boundary conditions imposed by the fiber, e.g., core (spot) size and the refractive indices of the core and cladding. Note 2: The solution of Maxwell's equations for the lowest order bound mode will permit a pair of orthogonally polarized fields in the fiber, and this is the usual case in a communication fiber. Note 3: In step-index guides, single-mode operation occurs when the normalized frequency, V, is less than 2. 405. For power-law profiles, single-mode operation occurs for a normalized frequency, V, less than approximately where g is the profile parameter. Note 4: In practice, the orthogonal polarizations may not be associated with degenerate modes. Synonyms monomode optical fiber, single-mode fiber, single-mode optical waveguide, unimode fiber.
Industry:Telecommunications
An optical fiber in which the cross section, i.e., cross-sectional diameter or area, varies, i.e., increases or decreases, monotonically with length.
Industry:Telecommunications
An optical fiber in which the polarization planes of lightwaves launched into the fiber are maintained during propagation with little or no cross-coupling of optical power between the polarization modes. Note 1: Cross sections of polarization-maintaining optical fibers range from elliptical to rectangular. Note 2: Polarization-maintaining optical fibers are used in special applications, such as in fiber optic sensing and interferometry. Synonym polarization-preserving (PP) optical fiber.
Industry:Telecommunications
An optical fiber in which the refractive index contrast is small (substantially less than 1%. )
Industry:Telecommunications
An optical fiber made with core and cladding materials that recover, within a specified period of time, a specified percentage of their intrinsic transparency after darkening from exposure to a radiation pulse.
Industry:Telecommunications
An optical fiber that has a silica-based core and a plastic cladding. Note 1: The cladding of a PCS fiber should not be confused with the polymer overcoat of a conventional all-glass fiber. Note 2: PCS fibers in general have significantly lower performance characteristics, i.e., higher transmission losses and lower bandwidths, than all-glass fibers. Synonym polymer-clad silica fiber.
Industry:Telecommunications
An optical fiber that supports the propagation of more than one bound mode. Note: A multimode optical fiber may be either a graded-index (GI) fiber or a step-index (SI) fiber.
Industry:Telecommunications
