Single-mode gigabit SFP transceivers are optical modules designed for long-distance, high-speed data transmission over single-mode fiber, typically supporting 10 km to over 80 km links at 1310nm or 1550nm wavelengths.

Overview

Single-mode SFP (Small Form-factor Pluggable) transceivers are hot-swappable optical modules that convert electrical signals into optical signals and vice versa, enabling network devices like switches, routers, and servers to communicate over single-mode fiber (SMF) with minimal signal loss . They are optimized for long-distance, high-bandwidth transmission, making them ideal for campus backbones, metro networks, and telecom applications .

Key Specifications

• Fiber Type: Single-mode fiber (core ~9/125µm)
• Wavelengths: Commonly 1310nm or 1550nm
• Link Distance: Typically 10 km to 80+ km depending on model and optical power budget
• Connector Types: LC Duplex or LC Simplex
• Data Rate: 1 Gbps (Gigabit Ethernet)
• Hot-Pluggable: Allows replacement or upgrades without powering down equipment

Popular Models and Standards

• 1000BASE-LX/LH SFP: Operates on single-mode fiber up to 10 km; compatible with multimode fiber using mode conditioning patch cables .
• 1000BASE-EX SFP: Supports single-mode fiber spans up to 40 km; may require inline optical attenuators for short distances .
• 1000BASE-ZX SFP: Designed for long-haul single-mode fiber links up to approximately 70 km, with an optical link budget of 21 dB .

Vendor Options

• Cisco: Offers a wide range of single-mode SFP modules compatible with their switches and routers, including LX/LH, EX, and ZX models .
• FS.com: Provides 1G SFP transceivers for distances from 100 m to 160 km, supporting 1000BASE-LX/LH and other standards .
• Lanshack: Supplies 1 Gigabit single-mode SFP transceivers for distances from 10 km to 180 km, compatible with major networking devices .
• Mouser Electronics: Stocks single-mode fiber optic transmitters, receivers, and transceivers with datasheets and pricing for various models .

Applications

Single-mode gigabit SFP transceivers are commonly used for:

• Enterprise networks: Connecting switches and routers across large campuses
• Data centers: High-speed uplinks and interconnects
• Telecom networks: Long-distance backbone links
• Metro networks: City-wide fiber connections These transceivers provide reliable, plug-and-play connectivity for professional networking environments, ensuring high-speed performance and long-distance reach without signal degradation . For selecting the right model, consider link distance, wavelength, connector type, and vendor compatibility with your existing network equipment.