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Journal Article
Distributed fiber Raman amplifiers with localized loss
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- Authors
- Seung Kwan Kim, Sun Hyok Chang, Jin Soo Han, Moo-Jung Chu, Jong Hyun Lee
- Issue Date
- 2003-05
- Citation
- IEEE/OSA Journal of Lightwave Technology, v.21, no.5, pp.1286-1293
- ISSN
- 0733-8724
- Publisher
- Optical Society of America (OSA)
- Language
- English
- Type
- Journal Article
- Abstract
- Backward pumped C- and L-band distributed fiber Raman amplifiers are described, where discrete losses from 0-8 dB were added at various positions to examine the effect of localized loss. Below 3-dB additional loss, the overall optical performance degraded similarly, regardless of loss position in a hybrid Raman and erbium-doped fiber amplifier. Above 3 dB, the performance degradation worsened as the loss position became closer to the signal output. The spectral shape change of the fiber output against loss variation was made tolerable within 짹0.4 dB simply by balancing the output power of L band with that of C band, unless the loss was close to pump input. The tolerance provides design flexibility for hybrid optical amplifiers and allows the use of fixed gain-flattening filters.
- KSP Keywords
- Additional loss, Backward pumped, C-band, Design flexibility, Fiber Raman amplifier, Gain flattening filter, L-band, Output power, Spectral Shape, erbium-doped fiber amplifier(EDFA), fixed gain