10 Gbit/s Penalty Free Optical Transmission over 102.5 km of Standard Fiber using 1.3microns Electroabsorption Modulated Laser and Raman Amplifier.
02 June 1996
We report the first penalty free transmission experiment over 102.5 km long standard fiber at a bit rate of 10 Gbit/s using a 1.3microns wavelength low chirp integrated DFB/Electroabsorption modulator in combination with Raman amplifier and a transimpedance type receiver front end. Transmitter power of +1.7 dBm and Raman amplifier with a gain of +19.4 dB results in a total launched power as high as +21.1 dBm into the fiber. The Stimulated Brillouin Scattering (SBS) effect was suppressed by superimposing a sinusoidal dithering signal at 10 kHz to the DFB section of the EML device. Penalty free transmission was observed with no significant degradation of the BER due to the noise from the Raman amplifier.