System Parameters
Channel
Deployment Scenarios
82
Max Distance (km)
2.4
Rate @10km (Gbps)
384
Rate @50km (Mbps)
35
Half-Rate Distance (km)
Key Rate vs Distance
Throughput vs Distance
Deployment Scenario Comparison
| Scenario | Distance | Key Rate | Throughput | Use Case |
|---|
Distance Limitations
Physical Limits
- • Fiber loss: ~0.2 dB/km @ 1550nm
- • Every 15 km = 3 dB loss = 50% power
- • Excess noise accumulation
- • Phase drift compensation range
Extension Strategies
- • Lower excess noise sources
- • Higher detector QE
- • Improved reconciliation (β→0.98)
- • Trusted relay nodes