Soliton Transmission Over Many Thousands of Kilometers in Loss Compensated Fiber

Researchers at AT&T Bell Laboratories have demonstrated the transmission of soliton pulses over many thousands of kilometers of fiber path without the use of electronic regeneration.1 Instead, Raman gain from pump light periodically injected along the fiber cancelled the normal fiber loss, so that the non-dispersive solitons (based on index nonlinearity) could maintain both their strength and width throughout the entire trip. This achievement is thought to foreshadow the development of all-optical long distance transmission systems featuring ultra high bit rates and high reliability.

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