DCM

DCM

optical-sintai

What are Dispersion Compensating Fibers?
Compensation of dispersion at a wavelength around 1550nm in a 1310nm optimized single-mode fiber can be achieved by specially designed fibers whose dispersion coefficient (D) is negative and large at 1550nm. These types of fibers are known as Dispersion Compensating Fibers (DCFs).

How does dispersion compensating fiber work?
A short length of dispersion-compensating fiber is spliced into a longer length of standard fiber to compensate for dispersion, as in the example below. Dispersion can cause various penalties in signal transmission in optical communications systems.

How can optical fiber dispersion compensation be overcome?
One way to reduce modal dispersion is to use graded-index fiber. Unlike the two distinct materials in a step-index fiber, the graded-index fiber's cladding is doped so that the refractive index gradually decreases over many layers.

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DCM