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Fibre optical couplers for FTTH networks

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FTTH (fibre to the home) is the next generation networks that will replace current copper cable based broadband access networks. Using optical fibre, the access bandwidth for each household or business can be increased from several tens of megabit per second (Mbps) at current ADSL to sever hundred Mbps, or even above one gigabit per second (Gbps).

Bitline System provides a series of fibre optical components that help telecommunication companies to construct the next generation FTTH networks.

One of the most important and also the building block for optical networks is optical couplers. FTTH networks require two types of optical couplers: standard couplers and wavelength division multimplexing (WDM) couplers.

Standard couplers split or combine optical power regardless of the wavelength of the light, as long as the wavelength is within the working bandwidth of the coupler. Important specifications of the standard couplers include insertion loss, operation wavelength range, polarization dependent loss (PDL), reliability and cost.

We provide standard couplers with 1x2, 2x2, 1x3, 3x3, 1x4, 4x4, etc configurations. Our couplers have first-class specifications in the industry, such as ultra-low insertion loss and PDL, wideband (80nm operation bandwidth), dual band (1310&1550nm), special wavelengths (from 630nm to 1625nm) and small size (mini-size couplers also available). All couplers must pass through long time environmental stability test to ensure their reliability under various harsh conditions.

WDM couplers split or combine optical powers at different wavelengths. They are normally used to construct WDM optical networks, which can significantly increase the bandwidth in a single fiber. We provide various types of WDM couplers, such as 1310/1550 WDM coupler (high isolation types), 850/1310nm multimode WDM and 1x2/1x3 triplexer couplers 1310/1490/1550nm. These WDM couplers provide building blocks for FTTH networks that deliver multiple services on different wavelengths.

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