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Novel 1470-nm-Band WDM Transmission and Its Application to Ultra-Wide-Band WDM Transmission
Jun-ichi KANI Tadashi SAKAMOTO Masahiko JINNO Kuninori HATTORI Makoto YAMADA Terutoshi KANAMORI Kimio OGUCHI
IEICE TRANSACTIONS on Communications
Publication Date: 1999/08/25
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: Optical Systems and Technologies
wavelength division multiplexing (WDM), dispersion-shifted fiber, four-wave mixing, stimulated Raman scattering, thulium-doped fiber amplifier,
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A novel 1470-nm-band (S+ band) wavelength-division multiplexing (WDM) transmission system is described. The first advantage of S+-band transmission is suppression of degradation caused by four-wave mixing (FWM), which has been the dominant impairment factor in WDM transmission systems on dispersion-shifted fibers (DSFs). FWM suppression by using the S+ band instead of the conventional 1550-nm-band (M band) is successfully demonstrated. The second advantage is expansion of the usable bandwidth by using the S+ band together with other wavelength bands. A triple-wavelength-band WDM repeaterless transmission experiment using the S+ band, the M band and the L band (1580-nm-band) is conducted over DSF, and it is shown that degradation due to inter-wavelength-band nonlinear interactions is negligible in the transmission. Moreover, the transmission performance of an S+-band linear repeating system is estimated by computer simulation, and compared with that of other wavelength-band systems. In the experiments, thulium-doped fiber amplifiers (TDFAs) are used for amplification of signals in the S+ band.