Negative-chirp electroabsorption modulator using low-wavelength detuning

The negative chirp of an electroabsorption modulator having an /spl alpha/-parameter value of 0 to -0.5, at an input light wavelength of 1.55-1.56 μm, has been developed by optimizing the bandgap energy of an InGaAsP bulk absorption layer. We have demonstrated successful transmission with 10 Gb/s NRZ modulation over a 100-km span of standard fiber without resort to dispersion compensation.