Gigabit Single-Core Single-Mode Optical Module

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 SpecificationsData 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 connectorsGBIC modules: SC connectorsSome 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 ApplicationsEnterprise and campus networks: Access-layer switching and fiber uplinksData centers: Connecting servers, storage, and switchesTelecom and long-haul networks: High-reliability single-mode linksLegacy infrastructure upgrades: Compatible with existing 1G SFP ports without replacing hardware .AdvantagesHot-pluggable: Can be inserted or removed without powering down equipmentFlexible deployment: Supports multimode, single-mode, BiDi, or copper mediaCost-effective: Maintains 1Gbps connectivity where higher speeds are unnecessaryReliable: 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 .