Gigabit Single-Mode Optical Module Single Core

A Gigabit single-mode single-core optical module is a hot-pluggable transceiver that supports 1Gbps Ethernet over single-mode fiber, typically with transmission distances ranging from 10 km to 120 km depending on wavelength and module type.

Key Specifications

Data Rate: These modules operate at 1Gbps (1.25Gbps nominal), compatible with Gigabit Ethernet, 1G Fiber Channel, and SDH networks, and are backward compatible with lower speeds like 100Mbps for legacy systems . Wavelength: Common single-mode wavelengths include:

• 1310 nm: Suitable for medium distances up to 40 km, with moderate loss and low dispersion .
• 1550 nm: Optimized for long-distance transmission above 40 km, capable of reaching up to 120 km without repeaters . Transmission Distance: Depending on the module and fiber quality, single-mode single-core modules can cover:
• 10 km (standard LX/LH SFP)
• 40 km, 80 km, or 120 km for long-haul applications . Interface Type:
• SFP modules: LC connectors
• GBIC modules: SC connectors
• Some single-fiber BiDi modules use a single strand with wavelength separation for transmit and receive channels . Laser and Optical Power:
• Modules use semiconductor lasers to emit light, with transmit optical power and receive sensitivity designed to maintain low bit error rates over the specified distance .
• Digital Optical Monitoring (DOM) is often supported, allowing real-time monitoring of optical power, temperature, and voltage .

Practical Applications

• Enterprise and campus networks: Access-layer switching and fiber uplinks
• Data centers: Connecting servers, storage, and switches
• Telecom and long-haul networks: High-reliability single-mode links
• Legacy infrastructure upgrades: Compatible with existing 1G SFP ports without replacing hardware .

Advantages

• Hot-pluggable: Can be inserted or removed without powering down equipment
• Flexible deployment: Supports multimode, single-mode, BiDi, or copper media
• Cost-effective: Maintains 1Gbps connectivity where higher speeds are unnecessary
• Reliable: Standardized form factor ensures interoperability across devices . In summary, Gigabit single-mode single-core optical modules provide a versatile, reliable, and long-distance solution for 1Gbps Ethernet and related applications, with options for different wavelengths, distances, and monitoring capabilities to suit enterprise, data center, and telecom environments .