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area. In most cases the core's cross-section should be circular, but the diameter is more rigorously defined as the average of the diameters of the smallest circle that can be circumscribed about the core-cladding boundary, and the largest circle that can be inscribed within the core-cladding
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of a different glass, or plastic. Light travelling in the core reflects from the core-cladding boundary due to
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that enter the fiber with a sufficiently small angle to the fiber's axis. The limiting angle is called the
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boundary. This allows for deviations from circularity due to manufacturing variation.
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that runs along the fiber's length. The core is surrounded by a medium with a lower
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of light in the fiber falls to some specified fraction of maximum (usually
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is the part of the fiber that guides the light. It is a cylinder of
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Another commonly quoted statistic for core size is the
312:"The FOA Reference For Fiber Optics - Optical Fiber"
62:. Unsourced material may be challenged and removed.
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27:Part of an optical fiber that carries light
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122:Learn how and when to remove this message
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197:. As a result, the fiber transmits all
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243:The three most common core sizes are:
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300:. Lake Publishing Corporation. 1978.
228:. This is the diameter at which the
150:4. Buffer or jacket 900 μm dia.
60:adding citations to reliable sources
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265:62.5 μm diameter (multi-mode)
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212:The core is characterized by its
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47:needs additional citations for
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148:3. Coating 250 μm dia.
138:The structure of a typical
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144:1. Core 9 μm diameter
191:total internal reflection
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276:Buffer (optical fiber)
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258:50 μm diameter (
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56:improve this article
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226:mode field diameter
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403:Fiber optics
358:expanding it
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234:1/e ≈ 13.5%)
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54:Please help
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253:single-mode
207:guided rays
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282:References
260:multi-mode
251:diameter (
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18:Fiber core
321:April 10,
230:intensity
112:July 2017
270:See also
214:diameter
187:cladding
179:plastic
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