Vlnový multiplex
Vlnový multiplex je dobrým a cenovo dostupným riešením prenosu viacerých signálov cez to isté vlákno. Každá vlnová dĺžka (farba) prenáša signál. Týmto spôsobom môžete výrazne zvýšiť kapacitu existujúcich káblov. V kombinácii s Ad / Drop Multiplexovaním (OADM) je možné pridať či ubrať konkrétnu vlnovú dĺžku na ceste medzi koncovými bodmi. Veľkou výhodou použitia multiplexovania je tiež to, že metóda je nezávislá na protokole a rýchlosti.
Wavelength multiplexing is available in 3 versions:
CWDM
With CWDM the fiber’s wavelength range can be divided into a maximum of 18 channels. CWDM is usually configured over a two-fiber system where a double set of filters and two fibers are used combine, divide and transport the signals each direction.
CWDM technology can also be utilized over one fiber. Every other channel in CWDM is used as Tx and Rx. This utilizes the fact that CWDM SFP transceivers transmit (Tx) at a specific wavelength but receive (Rx) all wavelengths. This way, 9 channels can be utilized with standard CWDM SFPs.
DWDM
Passive DWDM, Dense Wavelength Division Multiplexing, uses similar technology to CWDM, but now even more channels can be utiliyed on on a single fiber pair. 40 and 80 channel systems over two fibers are common. DWDM can also be used to expand a CWDM channel with 8 or 16 DWDM channels. In this way one can expand infrastructure without building large configurations from the beginning.
Active DWDM uses the same building blocks as passive, but now the possibility of amplifiers and transponders are added. Through our trusted partners, we can offer active DWDM solutions tailored your needs.
OADM (OPTICAL ADD-DROP MULTIPLEXER)
Optical Add Drop Multiplexing, or OADM, is a supplement to CWDM. In the configuration example shown, CWDM is configured as a point to point system. With OADM it is possible to remove and/or add wavelengths to the fiber line. In this way, you can build your WDM system by taking out or adding wavelengths at certain locations along the installed fiber.
All FOSS OADM products can be delivered ready for use in the same plug and play solutions as for CWDM; FPM panel (1U/3U), FP Pro panel (1U), DIN box, BUDI wall box and FOSC splicing enclosures.
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