Infinera and Telstra demonstrated submarine super-channel technology for the optimization of the capacity of single fiber by 50 percent.
PM-8QAM technology can increase the value of established submarine cable systems around the world by optimizing the capacity of a fiber, said Infinera. PM-8QAM can deliver 50 percent increase in capacity compared to the most common coherent modulation technique, PM-QPSK, in a typical installation under the same conditions.
Telstra and Infinera conducted the test across 2,200 kilometers of Segment F of the Reach North Asia Loop (RNAL), included Polarization Multiplexed 8 Quadrature Amplitude Modulation (PM-8QAM), and advanced FlexCoherent modulation formats, along with transmitter and receiver-based signal processing technologies. Segment F runs between Wada in Japan and Pusan in South Korea.
The company said the trial demonstrates the potential of FlexCoherent modulation formats on a single line card and the ability to precisely trade capacity for reach and margin.
“The trial highlights the emergence of next generation coherent processing that works with existing coherent 100 Gigabit per second technologies, which are firmly entrenched in modern submarine terminating line equipment, such as the Infinera DTN-X platform,” said Steve Grubb, Infinera Fellow and the architect behind the RNAL demonstrations.
The RNAL trial included demonstrations of advanced coherent transmitter-based Nyquist DWDM pulse shaping, and both transmitter and receiver-based non-linear compensation technologies, said Infinera.
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