A
fiber optic adapter, sometimes also called a coupler, is a small device
designed to terminate or link the fiber optic cables or fiber optic
connectors between two fiber optic lines.

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By linking two connectors
precisely, fiber optic adapters allow the light sources to be transmitted at
most and lower the loss as much as possible. At the same time, fiber optic
adapters have the merits of low insertion loss, good interchangeability and
reproducibility. FS supplies a wide range of mating sleeves and hybrid
adapters, including special male to female hybrid fiber optic
adapters.