Optical module code 100g
100G optical modules, commonly in QSFP28 form factor, support 100GbE connectivity with various standards like SR4, DR4, FR4, LR4, and CWDM4, each optimized for specific fiber types, distances, and applications.
Overview of 100G Optical Modules
100G optical modules are hot-pluggable transceivers designed to deliver 100 Gigabit Ethernet connectivity. The most common form factor is QSFP28 (Quad Small Form-factor Pluggable 28), which aggregates four 25Gbps lanes to achieve 100Gbps total throughput. These modules are widely used in data centers, enterprise core networks, and telecom infrastructure due to their high port density, standardized interface, and broad ecosystem support .
Common 100G Module Types
| Module Code | Fiber Type | Max Distance | Connector | Notes |
|---|---|---|---|---|
| SR4 | Multimode (OM3/OM4) | 70–100m | MPO | Short-range, high-density data center links |
| SL4 | Multimode | 20–30m | MPO | Short-link, cost-effective for intra-rack connections |
| DR1 / DR4 | Single-mode | 500m | Duplex LC | Medium-range, single-lambda PAM4 for 100Gbps |
| FR4 | Single-mode | 2km | Duplex LC | Metro or campus links, compatible with 100G-FR/LR |
| LR4 | Single-mode | 10km | Duplex LC | Long-range, standard 100GBASE-LR |
| CWDM4 | Single-mode | 2km | Duplex LC | Coarse Wavelength Division Multiplexing, cost-effective for short to medium distances |
| SWDM4 | Multimode | 150m | LC | Short-wavelength division multiplexing, four wavelengths per fiber |
Key Selection Considerations
- Distance Requirements: Choose SR4 or SWDM4 for short intra-data center links, DR1/DR4 for medium-range, and LR4 for long-range connections.
- Fiber Type: Multimode fibers (OM3/OM4/OM5) are used for short distances; single-mode fibers are required for longer distances.
- Connector Type: MPO/MTP connectors are common for parallel multimode modules, while LC duplex connectors are standard for single-mode modules.
- Transmission Technology: Modules may use parallel lanes (4×25G) or single-lambda PAM4 for 100Gbps, affecting compatibility and breakout options.
- Application Scenario: High-density racks, server-to-switch links, or inter-data center connections influence module choice based on cost, power consumption, and space constraints .
Summary
100G optical modules provide flexible, high-speed connectivity for modern networks. QSFP28 modules are the standard, supporting multiple transmission standards (SR4, DR4, FR4, LR4, CWDM4) to match distance, fiber type, and deployment needs. Selecting the right module involves balancing distance, fiber type, connector interface, and application requirements to ensure optimal performance and cost efficiency .
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