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Optical Module SFP-GE Single-Mode Module

Optical Module SFP-GE Single-Mode Module

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The SFP-GE-Single Mode is a small form-factor pluggable Gigabit Ethernet optical module designed for single-mode fiber, supporting distances up to 10 km and often requiring paired modules for bidirectional operation.

Overview

The SFP-GE-Single Mode module is a Gigabit Ethernet (1 Gbps) optical transceiver that connects network devices such as switches and routers over single-mode fiber (SMF). It is hot-swappable, allowing installation or replacement without powering down the device, and typically uses an LC connector for full-duplex communication .

Key Specifications

  • Fiber Type: Single-mode fiber (SMF)
  • Wavelength: Commonly 1310 nm for standard LX modules; bidirectional (BIDI) modules use paired wavelengths, e.g., 1310 nm transmit / 1490 nm receive
  • Transmission Distance: Up to 10 km for standard single-mode SFPs; some extended-range modules can reach 40–70 km depending on the model
  • Interface: LC duplex connector for standard modules; single-fiber BIDI modules use one fiber for both transmit and receive
  • Hot-Swappable: Yes, supports easy replacement without network downtime
  • Digital Optical Monitoring (DOM): Some modules support DOM to monitor real-time parameters such as optical output/input power, temperature, and voltage

Bidirectional (BIDI) Operation

Single-fiber BIDI SFP modules must be used in pairs, with one module transmitting at one wavelength and the other receiving at the complementary wavelength. For example, SFP-GE-LX-SM1310-BIDI must be paired with SFP-GE-LX-SM1490-BIDI to establish a full-duplex link over a single fiber strand .

Compatibility and Deployment

  • Compatible with a wide range of switches and routers that support SFP ports
  • Can interoperate with other 1G SFPs as long as they follow the 1000BASE-LX/LH or 1000BASE-BX10 standards
  • For multimode fiber connections, a different SFP type (e.g., 1000BASE-SX) is required, as single-mode SFPs are optimized for long-distance SMF links
  • When using legacy multimode fiber with LX modules, a mode-conditioning patch cable may be required to prevent signal distortion

Summary

The SFP-GE-Single Mode module is ideal for long-distance Gigabit Ethernet connections over single-mode fiber, offering flexibility, hot-swappable convenience, and optional monitoring features. For single-fiber BIDI modules, proper pairing is essential to ensure full-duplex communication. These modules are widely used in enterprise and carrier networks for reliable, high-speed optical connectivity .

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