Simultaneous amplification and channel equalization using Raman amplifier for 30 channels in 1.3-μm band

H. S. Seo, Kyunghwan Oh, U. C. Pack

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A new technique is proposed to simultaneously amplify signals and equalize power unbalance caused by Raman-induced crosstalk among optical channels in the 1.3-μm band. The crosstalk is induced in GeO2-doped silica fibers due to the Raman-gain coefficient with a positive slope below the peakfrequency shift of 440 cm-1. Highly doped GeO2 silica fiber, however, shows a negative slope across the band between 440 cm-1 and 490 cm-1. We propose expansion of the Raman-gain band with a negative slope over the bandwidth of 150 cm-1 using multiple pumps. Utilizing the negative gain slope of the proposed band, simultaneous amplification and power equalization was theoretically demonstrated for 30 channels in the 1.310-1.345 μm region without external filters.

Original languageEnglish
Pages (from-to)391-397
Number of pages7
JournalJournal of Lightwave Technology
Volume19
Issue number3
DOIs
Publication statusPublished - 2001 Jan 1

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amplifiers
slopes
crosstalk
silicon dioxide
fibers
pumps
bandwidth
filters
expansion
shift
coefficients

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

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abstract = "A new technique is proposed to simultaneously amplify signals and equalize power unbalance caused by Raman-induced crosstalk among optical channels in the 1.3-μm band. The crosstalk is induced in GeO2-doped silica fibers due to the Raman-gain coefficient with a positive slope below the peakfrequency shift of 440 cm-1. Highly doped GeO2 silica fiber, however, shows a negative slope across the band between 440 cm-1 and 490 cm-1. We propose expansion of the Raman-gain band with a negative slope over the bandwidth of 150 cm-1 using multiple pumps. Utilizing the negative gain slope of the proposed band, simultaneous amplification and power equalization was theoretically demonstrated for 30 channels in the 1.310-1.345 μm region without external filters.",
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Simultaneous amplification and channel equalization using Raman amplifier for 30 channels in 1.3-μm band. / Seo, H. S.; Oh, Kyunghwan; Pack, U. C.

In: Journal of Lightwave Technology, Vol. 19, No. 3, 01.01.2001, p. 391-397.

Research output: Contribution to journalArticle

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