H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/17 (2006.01) G02F 1/39 (2006.01) H01S 3/30 (2006.01) H04B 10/18 (2006.01)
Patent
CA 2335891
A transmission fiber for use in a Raman amplified optical communication system is formed to exhibit certain characteristics that limit modulation instability and four-wave mixing in the amplification region, thus reducing the noise component present in the transmission system. In particular, the group-velocity dispersion (denoted as D and measured in terms of ps/nm-km) is restricted to be either non- positive or greater than +1.5ps/nm-km in the pump wavelength range of interest (a typical pump wavelength range being 1430-1465nm). Preferably, the magnitude of the dispersion is kept below a value of 10 ps/nm-km in the signal wavelength range of interest (e.g., the "C" band or "L" band). Four-wave mixing is reduced by ensuring that the zero- dispersion frequency of the transmission fiber is not centered between the pump frequency and a frequency experiencing Raman gain.
Hansen Per Bang
Lee Robert B.
Park Seo Y.
Reed William Alfred
Stentz Andrew John
Kirby Eades Gale Baker
Lucent Technologies Inc.
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