Time division demultiplexing using selective Raman amplification

Details Time division demultiplexing using selective Raman amplification Time division demultiplexing using selective Raman amplification

1996-11-13

1999-03-09

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359139, 359158, 359134, 359123, H04J 1408

Patent

active

058808663

ABSTRACT:
An optical transmission system utilizing a nonlinear fiber demultiplexer. A time division multiplexed optical signal is transmitted via a first optical signal path. An optical pump pulse is transmitted via a second optical signal path. The optical pump pulses are synchronized to correspond to the pulses in the multiplexed optical signal for which extraction is desired. The first and second optical signal paths are coupled such that the portions of the multiplexed signals which are synchronized with the optical pump pulses are amplified through Raman gain. The resulting signal is detected and passed through a threshold detector which filters out pulses below an intensity threshold. The desired demultiplexed signal, which was amplified by the pump pulses, passes through the optical threshold detector as an electronic pulse.

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Hedekvist et al., Demonstration of fibre four-wave mixing optical demultiplexing with 19dB parametric amplification, Elect. Lett., Online No. 19960522, Feb. 16, 1996.

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