PhotoLink : Digital Audio Signal Transmission by Plastic Optical Fiber.
Plastic Optical Fiber, abbreviated POF, typically uses PMMA (acrylic), a general purpose resin as the core material, and fluorinated polymers for the clad material. In large-diameter fibers, 96% of the cross section is the core that allows the transmission of light. POF had been called the “consumer” optical fiber, It has fiber diameter of 1000 μm, with a core diameter of 980μm.
POF has been used for transmission due to the fact that costs of POF, associated optical links, connectors and installation costs are low.