Article Overview

A 10G SFP+ LR optical module designed for 10km single-mode fiber operates at a wavelength of 1310 nm.

10G SFP+ LR (Long Reach) modules are standardized for single-mode fiber transmission up to 10 kilometers, using a 1310 nm wavelength to balance signal integrity, chromatic dispersion, and attenuation over medium distances . This wavelength is chosen because it allows stable 10G transmission without requiring dispersion compensation, making it ideal for interconnecting switches, routers, and servers across enterprise, campus, or metropolitan area networks.

Key Characteristics

  • Fiber Type: Single-mode fiber (SMF) is required due to its narrow core, which minimizes modal dispersion and supports reliable long-distance transmission .
  • Maximum Distance: Typically up to 10 km under standard conditions, though some modules can reach slightly longer distances depending on fiber quality .
  • Standards Compliance: These modules follow IEEE 802.3ae 10GBASE-LR specifications and SFP+ Multi-Source Agreement (MSA) standards, ensuring interoperability across vendors .
  • Connector Type: LC duplex connectors are commonly used for these modules .
  • Applications: Suitable for data center interconnects, campus networks, and backbone links where medium-range 10G connectivity is required . In summary, if you are deploying a 10km 10G optical link, the module will operate at 1310 nm over single-mode fiber, providing a reliable balance of distance, signal quality, and compatibility across network equipment.

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