A 1310nm SFP is a widely used fiber optic transceiver designed to transmit data over single-mode fiber using a 1310-nanometer wavelength. It is commonly found in Ethernet switches, routers, and other network equipment where stable, medium- to long-distance optical connections are. Download the Optosun Mechanical Fiber Optic Switch Bypass 2x2 Latching, 1310 nM PDF:The XG-SFP-LR-SM1310 is aligned to IEEE 10GBASE-LR optical specifications and supports a link length of up to 10 kilometers over a single-mode fiber (SMF) with an LC connector. It adopts the SFP+ form factor and operates at a wavelength of 1310 nm. The transceiver conforms to IEEE 802. 3ae. When engineers search for “SFP wavelength,” they are typically trying to answer a practical deployment question: Which optical wavelength should I use—850 nm, 1310 nm, or 1550 nm—and why does it matter? The answer directly affects fiber compatibility, transmission distance, link stability, and. This article delves into why 850, 1310, and 1550 nm are standard, what less-known regimes and tradeoffs exist, and how an OEM fiber-cable manufacturer can design and test with wavelength considerations built in. This frequency is known for having very little dispersion, which makes it perfect for medium-range communication like that found in cities or between them.