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'''Guided ray''': In an [[optical fiber]], a [[ray]] that is confined primarily to the [[core]]. |
'''Guided ray''': In an [[optical fiber]], a [[ray]] that is confined primarily to the [[core]]. |
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A guided ray satisfies the relation given by where θ<sub><i>r</i></sub> is the angle the ray makes with the [[fiber axis]], <i>r</i> is the radial position, <i>i.e.</i> |
A guided ray satisfies the relation given by where θ<sub><i>r</i></sub> is the angle the ray makes with the [[fiber axis]], <i>r</i> is the radial position, <i>i.e.</i>, radial distance, of the ray from the fiber axis, <i>n</i><sub><i>r</i></sub> is the [[refractive index]] at the radial distance r from the fiber axis, and <i>n<sub>a</sub></i> is the refractive index at the core radius, a, <i>i.e.</i>, at the core-[[cladding]] [[interface]]. Guided rays correspond to bound modes, <i>i.e.</i>, guided modes, in terms of modes rather than rays. <i>Synonyms</i> <b>bound ray, trapped ray.</b> |
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Revision as of 18:54, 4 March 2005
Guided ray: In an optical fiber, a ray that is confined primarily to the core.
A guided ray satisfies the relation given by where θr 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.