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Dual LC interface SFP

ODN and passive infrastructure knowledge brief Published 17 Jun 2023

Prepared for preliminary research by the GESTIONVAL ODN knowledge desk. Confirm network topology, split ratio, box or cabinet capacity, joint closure rating and loss budget against current standards and product documentation.

A Dual LC interface SFP is a fiber optic transceiver with two LC connectors enabling full-duplex optical communication over separate transmit (TX) and receive (RX) fibers.Overview

A dual LC SFP (Small Form-Factor Pluggable) module uses two LC (Lucent Connector) interfaces in a compact housing to support simultaneous bidirectional data transmission. One fiber carries the transmit signal (TX) while the other carries the receive signal (RX), making it ideal for full-duplex Ethernet and telecom links . The LC connector features a 1.25 mm ceramic ferrule, ensuring precise fiber alignment and low insertion loss, and is compatible with both single-mode (SMF) and multimode fiber (MMF) systems .

Advantages
  • High Density: The small LC footprint allows for 48 or more ports in a 1U switch, making it suitable for high-density data center environments .
  • Hot-Swappable: SFP modules can be replaced without powering down the network device, enabling flexible upgrades and maintenance .
  • Digital Diagnostics: Many dual LC SFPs support Digital Optical Monitoring (DOM), providing real-time data on optical power, temperature, and connection quality .
  • Versatility: Compatible with various data rates (1G, 10G, 25G) and wavelengths, supporting enterprise, industrial, and telecom applications .
Applications

Dual LC SFPs are widely used in:

  • Data Centers: Connecting switches, routers, and servers with high-speed fiber links.
  • Enterprise Networks: Backbone and aggregation links requiring reliable full-duplex communication.
  • Industrial Ethernet: Ruggedized SFPs with LC duplex connectors connect fiber optic patch cables to industrial switches and routers .
  • Telecom Networks: Standard for 1G, 10G, and 25G Ethernet optics, including long-distance single-mode fiber links .
Key Considerations
  • Correct Polarity: Ensure TX and RX fibers are properly connected to maintain stable optical links .
  • Fiber Type: Match the SFP module with the appropriate fiber type (SMF or MMF) and wavelength.
  • Distance Limitations: Depending on the module type, distances can range from a few hundred meters on multimode fiber to tens of kilometers on single-mode fiber . In summary, dual LC SFP modules provide a compact, high-density, and reliable solution for full-duplex optical communication, widely adopted across modern networking environments for both enterprise and industrial applications.

Dual LC interface SFP - GESTIONVAL ODN INFRASTRUCTURE S.L. [PDF]

Dual LC interface SFP

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This reference is intended for preliminary ODN and passive infrastructure research. Topology, split ratio, box or cabinet capacity, closure rating, cable type, test limits and applicable standards must be verified for the specific project.

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