Patent ID: 8244141

Claim:
An apparatus for generating a dispersion compensation signal, comprising: a splitting module; N pre-processing modules; N electro-optic modulators; an optical carrier generating module; N optical delayers; and an optical coupling module, wherein the splitting module is configured to split a data signal to be sent into N channels of data signals, wherein the N pre-processing modules are configured to adjust in frequency domain phases and amplitudes of the N channels of data signals output from the splitting module and output N channels of analog electrical signals, wherein the optical carrier generating module is configured to generate N channels of coherent optical carriers, wherein the N electro-optic modulators are configured to modulate the N channels of coherent optical carriers based on the N channels of analog electrical signals and generate N channels of optical signals, wherein the N optical delayers are configured to delay the N channels of optical signals generated by the N electro-optic modulators and adjust time difference among the N channels of optical signals so that the adjusted N channels of optical signals may enter the optical coupling module simultaneously, wherein the optical coupling module is configured to couple the adjusted N channels of optical signals into the dispersion compensation signal, wherein N is a natural number greater than 1, wherein the pre-processing module comprises a digital pre-processing module and a digit-analog conversion module, wherein the digital pre-processing module is configured to adjust in digital frequency domain phases and amplitudes of the N channels of data signals and output N channels of digital electrical signals, and wherein the digit-analog conversion module is configured to convert the N channels of digital electrical signals into N channels of analog electrical signals.