Single Fiber Pluggable Transceivers - Sponsored Whitepaper

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Introduction Fiber optic networking has traditionally required two strands of fiber to accomplish full duplex communications. To achieve full duplex transmission (meaning that transmitting and receiving signals can occur simultaneously) one strand is reserved for transmitting, the other for receiving.

Single strand fiber solutions are the simplest way to fiber optimization, immediately doubling the capacity of the installed fiber plant. Instead of using two dedicated strands, one for receiving and the other for transmitting, each strand carries a bi-directional signal. The fiber plant capacity doubles, which in turn can double the per fiber return on investment (ROI) with no need for more physical fiber. These solutions have been incorporated for many years in the Fiber Driver®, MRV’s Optical Multi-Service product line. Recent technological advancements at MRV have yielded many new variations of these solutions, doubling the efficiency of fiber even down to Ethernet in the First Mile.

The benefits and overall savings on a single strand (simplex) versus dual strand (duplex) fiber implementation can be considerable. Considerations include not only the cost of fiber optic cabling itself, but also the labor and material involved in terminating the endpoints, simplex versus duplex patch cords, cross-connect rack space, reduced points of failure, and other direct and indirect costs. This technology can also defer the need to install new fiber to support unexpected growth requirements.

Operational and Capital Expence Savings Single fiber solutions, like any other fiber optimization methods, affect both the capital expenses (CAPEX) and the operational expenses (OPEX). For fiber users like carriers and enterprises that lease dark fiber from their provider (carrier’s carrier) rather than owning the fiber plant, the OPEX savings is extremely significant. These carriers’ challenge is to maximize revenues while reducing their largest expenditure: the cost of fiber based transport. Maximizing fiber usage by using single fiber circuits reduces the OPEX by 50 % for each protocol-independent circuit, and allows the carrier to deliver more revenue-generating content to their subscribers.

For dark fiber owners such as the carrier’s provider, the single fiber approach is one of the best ways to reduce the operational costs (OPEX). The first and most important cost saving measure is to avoid installing additional fiber strands to accommodate growth without imposing limitations due to engineering capabilities.
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