Shinya Nagamatsu, Bera Palsdottir, Takeshi Hirasawa, Akira Fujisaki, Ryuji Takaoka and Shigeru Shikii
It has been more than 20 years since fiber-optic communication became practicable, and there has been a continuing stream of technological breakthroughs. The increased diffusion of the Internet has seen the rapid introduction of dense wavelength division multiplexing (DWDM) systems. With the burgeoning increases in communications capacity in recent years, attention has been focused on Raman amplifiers, and work goes forward on applying them to various systems. Among these may be mentioned Raman amplification technology for dispersion compensating fiber (DCF) modules. This paper reports on the results of integrating a DCF module that can be added to existing fiber-optic transmission devices with a Raman amplifier (incorporating control circuitry).