All-optical, 3R regeneration using the sagnac and mach-zehnder versions of the terahertz optical asymmetric demultiplexer (TOAD)

Abstract

A system and method for regenerating optical signals comprising a clock recovery circuit coupled to a transmission line, a first optical gating device having an input port coupled to the transmission line and a clock port coupled to the clock recovery circuit, and a second optical gating device having an input port coupled to a continuous wave (CW) laser and a clock port coupled to the output of the first optical gating device, wherein the optical gating devices may be terahertz optical asymmetric demultiplexers (TOADs).

Description

[0001] Related applications [0002] This application claims the benefit of US Patent Application No. 10 / 732,171, filed December 10, 2003, which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates generally to reproducing degraded bits in an optical signal, and more particularly to all-optical retiming, reshaping and re-amplification of degraded bits. Background technique [0004] In long-haul optical transmission systems, signals are typically transmitted at data rates on the order of 10-40 Gb / s. The bits in these signals degrade as the signal propagates over the fiber. The shape of these bits is attenuated due to fiber loss or fiber dispersion, and the timing of the bits drifts due to jitter. Before bits degenerate to the point of no recovery, they must be corrected or regenerated for further transmission. [0005] When the digital optical signal is sufficiently degraded, 3R regeneration-re-amplification, re-timing...

AI Technical Summary

Problems solved by technology

However, existing systems do not perform optical reshaping or retiming of the data signal

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