Novel 1470-nm-Band WDM Transmission and Its Application to Ultra-Wide-Band WDM Transmission

Jun-ichi KANI
Masahiko JINNO
Kuninori HATTORI
Terutoshi KANAMORI

IEICE TRANSACTIONS on Electronics   Vol.E82-C    No.8    pp.1397-1406
Publication Date: 1999/08/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section 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.