16G optical module interface type
16G optical modules typically use the SFP+ form factor with LC duplex optical interfaces, supporting both single-mode and multi-mode fiber.
Form Factor and Electrical Interface
16G Fibre Channel optical modules are generally implemented in the SFP+ (Small Form Factor Pluggable Plus) form factor, which is an evolution of the original SFP standard designed to handle higher data rates up to 16G FC (14.025 Gbps line rate) while maintaining hot-pluggable capabilities and low power consumption . The electrical interface of SFP+ modules connects to the host device (switch, server, or HBA) and typically uses a high-speed serial interface compatible with the SerDes/PHY circuitry on the line card .
Optical Interface
On the optical side, 16G SFP+ modules use LC duplex connectors for fiber connections . They support both multi-mode fiber (MMF) and single-mode fiber (SMF):
- Multi-mode fiber (850 nm VCSEL-based): Short-reach applications, typically up to 100 meters over OM3/OM4/OM5 fiber, suitable for intra-rack or data center SAN links .
- Single-mode fiber (1310 nm or 1550 nm DFB/EML lasers): Long-reach applications, ranging from 10 km to 40 km, suitable for campus or metropolitan SAN extensions .
Protocol and Standards
16G SFP+ modules are designed to comply with 16G Fibre Channel standards (FC-PI-5 Rev 6.00) and are backward compatible with 4G, 8G, and 10G FC protocols . They provide hot-pluggable connectivity and support digital diagnostics monitoring (DDM/DOM) for real-time performance monitoring.
Summary
- Form Factor: SFP+
- Electrical Interface: High-speed serial SerDes to host electronics
- Optical Interface: LC duplex connectors
- Fiber Types: Multi-mode (850 nm) and Single-mode (1310/1550 nm)
- Reach: 100 m (MMF) to 40 km (SMF)
- Standards: 16G Fibre Channel (FC-PI-5), backward compatible with 4G/8G/10G FC These characteristics make 16G SFP+ modules versatile for SAN, enterprise, and data center networks, providing high-speed, low-latency optical connectivity across short and long distances .
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