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Radiation mode - Definition |
| Related Words: Asteroids, Attenuation, Beam, Blackout, Broadcast, Broadcasting, Chiaroscuro, Contrast, Diffraction, Diffusion, Dilution, Dispersion |
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For an optical fiber, Radiation mode, or unbound mode, is an unbound mode.
In an optical fiber, a radiation mode is one having fields that are transversely oscillatory everywhere external to the waveguide, and which exists even at the limit of zero wavelength. Specifically, a radiation mode is one for which where β is the imaginary part (phase term) of the axial propagation constant, integer l is the azimuthal index of the mode, n (a) is the refractive index, where 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.
Source: from Federal Standard 1037C and from MIL-STD-188
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Example Usage of Radiation |
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goclinicaltrial: erlotinib & Radiation thrpy in treating older ppl w/ stage i, stage ii, stage iii, or stage iv esophageal cancer http://bit.ly/6Rmj8X |
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fitnewbie: @shuiteacompany I went through Radiation therapy non invasive in nature and I do drink green tea on a regular bas (cont) http://tl.gd/1a7rp |
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robertpalmer: SF mayor backs Radiation labels for cell phones, is beaten in Iran: http://twitpic.com/u8odg #photoisunrelated |
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