For an optical fiber or waveguide, a radiation mode or unbound mode is a mode which is not confined by the fiber core. Such a mode has fields that are transversely oscillatory everywhere external to the waveguide, and exists even at the limit of zero wavelength.
Specifically, a radiation mode is one for which
where β is the imaginary part of the axial propagation constant, integer l is the azimuthal index of the mode, n(r) is the refractive index at radius r, a is the core radius, and k is the free-space wave number, k = 2π/λ, where λ is the wavelength. Radiation modes correspond to refracted rays in the terminology of geometric optics.
radiation, mode, optical, fiber, waveguide, radiation, mode, unbound, mode, mode, which, confined, fiber, core, such, mode, fields, that, transversely, oscillatory, everywhere, external, waveguide, exists, even, limit, zero, wavelength, specifically, radiation. For an optical fiber or waveguide a radiation mode or unbound mode is a mode which is not confined by the fiber core Such a mode has fields that are transversely oscillatory everywhere external to the waveguide and exists even at the limit of zero wavelength Specifically a radiation mode is one for which b n 2 a k 2 l a 2 displaystyle beta sqrt n 2 a k 2 l a 2 where b is the imaginary part of the axial propagation constant integer l is the azimuthal index of the mode n r is the refractive index at radius r a is the core radius and k is the free space wave number k 2p l where l is the wavelength Radiation modes correspond to refracted rays in the terminology of geometric optics See also editGuided ray Numerical aperture Cladding fiber optics References edit nbsp This article incorporates public domain material from Federal Standard 1037C General Services Administration Archived from the original on 2022 01 22 in support of MIL STD 188 nbsp This optics related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Radiation mode amp oldid 1089583955, wikipedia, wiki, book, books, library,
