Single-Mode Fiber Optic Cable Tutorials

As the core of the fiber is so small that one ray of light at an angle of 0 ° incident can stably pass through the fiber length, without much loss, this type of fiber called single-mode optical fiber. The basic requirement for single-mode fiber is that the basic limit small enough to transfer to a mode of singing. This lowest order mode can propagate in all fibers with small cores (as long as light can be physically fibers).

The most common type of single mode fiber has a base diameter of 8-10 mu m and is designed for use in the near infrared (the most common are designed 1550nm and 1310nm). Please note that the structure of method depends on the wavelength of light used, so that these fibers actually a few extra modes to wavelengths visible support. multi-mode fiber, compared with core diameters as small as 50um multimode and as large as a hundred microns.

The image below shows the structure of a single mode optical fiber.

July 15, 2011

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