Title :
Compensation of Raman-induced crosstalk using a lumped germanosilicate fiber Raman amplifier in the 1.571-1.591-μm region
Author :
Seo, H.S. ; Oh, K. ; Shin, W. ; Ryu, U.C. ; Paek, U.C.
Author_Institution :
Dept. of Inf. & Commun., Kwangju Inst. of Sci. & Technol., South Korea
Abstract :
A new method to equalize power imbalance caused by Raman-induced crosstalk among optical channels is proposed using a lumped germanosilicate fiber Raman amplifier. Evolution of optical channels through the Raman amplifier was simulated using Raman frequency modeling, which theoretically predicted simultaneous amplification and power equalization. Experimentally, a gain band with negative slope in the range of 1.571-1.591 μm was achieved in a lumped Raman amplifier pumped by a broad-band laser diode centered at 1.467 μm. We demonstrated compensation of the Raman-induced crosstalk of 5 dB accumulated along 330 km of conventional single-mode fiber.
Keywords :
Raman lasers; germanium compounds; laser beams; optical crosstalk; optical fibre amplifiers; optical pumping; optical transmitters; silicon compounds; wavelength division multiplexing; 1.467 mum; 1.571 to 1.591 mum; 330 km; Raman amplifier; Raman frequency modeling; Raman-induced crosstalk; Raman-induced crosstalk compensation; SiO/sub 2/-GeO/sub 2/; amplification; broad-band laser diode; conventional single-mode fiber; gain band; lumped Raman amplifier; lumped germanosilicate fiber Raman amplifier; negative slope; optical channels; power equalization; power imbalance; Frequency; Laser excitation; Optical amplifiers; Optical crosstalk; Optical fiber amplifiers; Optical pumping; Power amplifiers; Predictive models; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
