Detailed Parameter Table of Optical Module
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 Parameters
| Parameter | Description | Typical Values / Notes |
|---|---|---|
| Form Factor | Physical size and interface type of the module | SFP, SFP+, SFP28, QSFP, QSFP28, QSFP56, QSFP-DD; determines switch/port compatibility |
| Connector Type | Interface to fiber cable | LC Duplex, SC Duplex, MPO/MTP; must match patch cables |
| Transmission Rate | Maximum supported data speed | 1G, 10G, 25G, 40G, 100G, 400G |
| Wavelength | Light color used for transmission | 850nm (MMF, short distance), 1310nm (SMF, medium distance), 1550nm (SMF, long distance), |
| Fiber Type | Type of fiber supported | Single-mode (SM), Multi-mode (MM), |
| Transmission Distance | Maximum reach without amplification | MMF: 500–550m; SMF: 15km, 40km, 80km, 120km |
| Transmitter Type | Laser technology used | VCSEL (MMF), DFB/EML (SMF); affects cost, power, and distance |
| Receiver Type | Photodetector technology | PIN photodiode, APD; determines sensitivity and reliability |
| Receiver Sensitivity | Minimum optical power detectable | Measured in dBm; higher data rates generally require higher sensitivity |
| Transmitted Optical Power | Output power of the transmitter | Measured in mW or dBm; must match receiver sensitivity |
| Extinction Ratio | Ability to distinguish between "1" and "0" signals | Measured in dB; higher ratio indicates better signal quality |
| Overload Optical Power | Maximum optical power the receiver can handle | Exceeding this may damage the receiver |
| Digital Diagnostics Monitoring (DDM/DOM) | Real-time monitoring of module parameters | Temperature, voltage, optical power levels; optional but useful for troubleshooting |
| Brand & Compatibility | Manufacturer and network equipment compatibility | Ensure module is compatible with switches/routers; some brands have restrictions |
Notes on Usage
- Compatibility: 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 .
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