Optical Module Parameter Table

Optical modules are defined by key parameters such as form factor, wavelength, transmission distance, laser type, and receiver sensitivity, which determine compatibility, performance, and reliability.Key Optical Module ParametersParameterDescriptionTypical Values / NotesForm FactorPhysical size and interface type of the moduleSFP, SFP+, SFP28, QSFP, QSFP28, QSFP56, QSFP-DD; determines switch/port compatibility Connector TypeInterface to fiber cableLC Duplex, SC Duplex, MPO/MTP; must match patch cables Transmission RateMaximum supported data speed1G, 10G, 25G, 40G, 100G, 400G WavelengthLight color used for transmission850nm (MMF, short distance), 1310nm (SMF, medium distance), 1550nm (SMF, long distance), Fiber TypeType of fiber supportedSingle-mode (SM), Multi-mode (MM), Transmission DistanceMaximum reach without amplificationMMF: 500–550m; SMF: 15km, 40km, 80km, 120km Transmitter TypeLaser technology usedVCSEL (MMF), DFB/EML (SMF); affects cost, power, and distance Receiver TypePhotodetector technologyPIN photodiode, APD; determines sensitivity and reliability Receiver SensitivityMinimum optical power detectableMeasured in dBm; higher data rates generally require higher sensitivity Transmitted Optical PowerOutput power of the transmitterMeasured in mW or dBm; must match receiver sensitivity Extinction RatioAbility to distinguish between "1" and "0" signalsMeasured in dB; higher ratio indicates better signal quality Overload Optical PowerMaximum optical power the receiver can handleExceeding this may damage the receiver Digital Diagnostics Monitoring (DDM/DOM)Real-time monitoring of module parametersTemperature, voltage, optical power levels; optional but useful for troubleshooting Brand & CompatibilityManufacturer and network equipment compatibilityEnsure module is compatible with switches/routers; some brands have restrictions Notes on UsageCompatibility: Ensure the module matches your switch/router port type and fiber cabling.Performance: Choose wavelength, fiber type, and transmitter/receiver specifications based on required distance and data rate.Reliability: Consider receiver sensitivity, extinction ratio, and overload power to maintain stable operation.Cost-Effectiveness: Balance features, distance, and power requirements to optimize network deployment costs. This table provides a comprehensive overview of the essential parameters to evaluate when selecting optical modules for data center, enterprise, or telecom networks .