Abstract
In the previous chapter we examined the excitation of modes of a fiber by illumination of the endface with beams and diffuse sources, i.e. by sources external to the fiber. Here we investigate the power of bound modes and the power radiated due to current sources distributed within the fiber, as shown in Fig. 21-1. Our interest in such problems is mainly motivated by the following chapter, where we show that fiber nonuniformities can be modelled by current sources radiating within the uniform fiber. Thus, isolated nonuniformities radiate like current dipoles and surface roughness, which occurs at the core-cladding interface, can be modelled by a tubular current source.
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© 1983 Allan W. Snyder and John D. Love
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Snyder, A.W., Love, J.D. (1983). Sources within fibers. In: Optical Waveguide Theory. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2813-1_23
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DOI: https://doi.org/10.1007/978-1-4613-2813-1_23
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-412-24250-2
Online ISBN: 978-1-4613-2813-1
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