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SLR320 Series ― Submarine Repeaterless Systems
Key benefits
- DWDM technology enables transmission up to 6.4Tbps per fiber pair
- Cost‐effective solution for transmission distances in excess of 400km, with no electronics in the transmission line
- Transport high‐capacity DWDM signals for connecting mainland to island, island to island, etc.
- Also applicable for long‐haul terrestrial systems, such as connecting a cable landing point to a metropolitan area POP
- Upgrade of existing cable (terrestrial or submarine)
- Provides ultra long‐reach solution for growing capacity demands
Example solution
SLR320 Series Lineup
Line Terminal Equipment SLR320SW
To meet the needs of transporting high‐capacity DWDM signals over transoceanic distances, specialized Line Terminal Equipment is required. This equipment provides the function of translation between the terrestrial network and the undersea network.
Key features
- Dense WDM Multiplexing and Demultiplexing
- Transmission capacity of up to 6.4Tbps (64 channels @ 100Gbps), 2.56Tbps (64 channels @ 40Gbps) or 640Gbps (64 channels @ 10Gbps) per fiber pair
- High output power provided by optical Er‐doped fiber booster amplifier
- Excellent receiver sensitivity provided by optical Er‐doped fiber pre‐amplifier
- In‐line Remote Pre‐Amplifier (IRPA) and/or Raman amplification
- Various and flexible tributary interfaces:
- 100GbE, OTU4 (software switchable)
- STM‐256, OC‐768, OTU3 (software switchable)
- STM‐64, OC‐192, OTU2/2e, 10GbE LAN-PHY/WAN PHY (software switchable)
- STM-16, OC-48
- Advanced soft decision forward error correction function
- Digital Coherent transponders provide automatic dispersion compensation and polarization demultiplexing
- Multiple modulation schemes available to optimize system capacity
- Extremely small footprint: up to 15 x 100G, 16 x 40G or 32 x 10G transponders per rack
SLR320SW with 100G transponders
SLR320SW with 40G transponders
In‐line Remote Pre‐Amplifier IRPA
The In‐line Remote Pre‐Amplifier enables extra‐long transmission distances without requiring electrical power. High power 1480nm wavelength light transmitted from the reception side of the LTE excites the Erbium‐doped fiber (EDF) in the Remote Amplifier, which thereby amplifies the transmission signal. This 1480nm wavelength is transmitted in the same fiber used for transmission of the main signal, without requiring any additional fibers for transmittng the pumping power.
Key features
- Needs no electrical power in the submerged plant
- 1480nm pumping laser amplifies the transmission signal by exciting the EDF (Erbium‐doped fiber) in the IRPA
- Pumping signal is transmitted over the same fiber pair used for transmission, requiring no additional fiber
- Accommodates up to 8 systems (fiber pairs)
| Distance | Configuration | Maximum System Gain (for 32 wavelengths) | ||
|---|---|---|---|---|
| 10Gbps | 40Gbps | 100Gbps | ||
| Long | Raman amplification | 67dB | 60dB | 57dB |
| Ultra‐Long | Raman amplification + IRPA | 79dB | 72dB | 69dB |
| Distance | Configuration | Maximum System Gain (for 64 wavelengths) | ||
|---|---|---|---|---|
| 10Gbps | 40Gbps | 100Gbps | ||
| Long | Raman amplification | 64dB | 57dB | 54dB |
| Ultra‐Long | Raman amplification + IRPA | 76dB | 69dB | 66dB |
