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Standard POF is made of a super pure polymethylmethacrylate (PMMA) fiber core, which is cladded with a sheath of flouropolymer. The large fiber core facilitates coupling to transmitter and receiver elements and allows the use of low-cost connector systems some of which have been specially developed for plastic fiber optics.
LEDs in the wavelength range of = 650 … 670 nm are used as transmitter elements. POF has a relative attenuation minimum of 160 dB/km in this range. The attenuation can be increased slightly (up to 200 dB/km for example) depending on the cable design. PIN diodes are used as receivers at the other end of the transmission path.
Because of the attenuation, the link length is typically limited to less than 100 m. Nowadays, green LEDs are used to get a smaller attenuation of about 100 dB/km.
INTERNET USERS ALSO CONSULTED ON THE CATEGORY FIBRE OPTICAL CABLE
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