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Performance Comparison of 1310nm Large Core Fiber and Power Consumption
1310nm optical modules over single-mode fiber offer low dispersion and moderate attenuation, with typical power consumption ranging from 0.8W for 10G SFP+ to 1–1.5W for 25G SFP28 modules.
Transmission Performance
1310nm modules operate in the O-band (1260–1360nm), which minimizes chromatic dispersion and provides stable performance for medium-distance links, typically up to 10–40 km depending on fiber type and module design . Large core single-mode fibers (G.652 compliant) support these modules with low attenuation (~0.42 dB/km at 1310nm) and minimal pulse broadening (dispersion coefficient ~0.91 ps/nm·km), ensuring high signal integrity over metro and campus networks . Compared to 1550nm modules, 1310nm modules are optimized for shorter to medium distances and are cost-effective due to simpler DFB laser designs .
Fiber Type Considerations
- Single-mode fiber (SMF): Ideal for 1310nm modules, supporting distances up to 40 km with low chromatic dispersion and low attenuation .
- Multimode fiber (MMF): Limited to shorter distances (~2 km at 1310nm) and typically paired with LED-based transceivers, which are less power-hungry but less efficient for high-speed links . Large core fibers improve coupling efficiency and reduce insertion loss, which can slightly enhance effective reach and reduce required laser power.
Power Consumption
- 10G SFP+ LR (1310nm): Typically uses uncooled DFB lasers, with module power consumption around 0.8 W, laser current 30–50 mA, and output power 1–2 mW .
- 25G SFP28 LR (1310nm): Uses narrow-linewidth DFB lasers for stable 25G operation, with power consumption around 1–1.5 W, depending on vendor features like digital diagnostics and temperature grade . Lower power consumption in 10G modules makes them suitable for dense deployments where thermal budget is critical, while 25G modules provide higher throughput at slightly higher energy cost.
Summary
| Parameter | 10G SFP+ LR (1310nm) | 25G SFP28 LR (1310nm) |
|---|---|---|
| Data Rate | 10 Gbps | 25 Gbps |
| Reach | ≤10 km (SMF) | ≤10 km (SMF) |
| Laser Type | DFB, uncooled | DFB, narrow-linewidth |
| Power Consumption | ~0.8 W | ~1–1.5 W |
| Attenuation | 0.42 dB/km | 0.42 dB/km |
| Dispersion | 0.91 ps/nm·km | 0.91 ps/nm·km |
In conclusion, 1310nm large core fiber with SFP+ or SFP28 modules provides a balance of moderate reach, low dispersion, and energy efficiency, making it suitable for metro, campus, and data center aggregation links. Choice between 10G and 25G modules depends on throughput requirements and power/thermal constraints .
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