Ultra-wide band signal generation using digitally jointed dual sidebands and RF up-conversion for single optical carrier transmission

1. A controller comprising:

a module for generating ultra-wide band electrical signals for high data-rate single optical carrier transmission with two sets of electrical baseband input signals;

an optical I/Q modulator coupled to two 2×2 I/Q up-converters to produce baseband electrical signals representing a positive side-band carrier and a negative side-band carrier; and

an IQ mixer applied to a single carrier which mixes baseband I and Q components with an RF local oscillator (LO) with frequency f Lo and fine phase adjustments to produce up-converted I′ and Q′ components each used to drive I and Q arms of an optical I/Q modulator as:

I′=I cos(2π f LO t )− Q sin(2π f LO t )

Q′=I sin(2π f LO t )+ Q cos(2π f LO t );

and

a processor with code for generating a digitally jointed baseband signal with radio frequency RF up-conversion to create optical dual side bands.

2. The controller of claim 1 , wherein the code for generating of the digitally jointed baseband signal comprises generating an optical side-band signal using RF I/Q up-conversion.

3. The controller of claim 1 , wherein the code for generating of the digitally jointed baseband signal comprises using a 2×2 RF I/Q up-converter to generate single I and Q signal components.

4. The controller of claim 1 , wherein the code for generating of the digitally jointed baseband signal comprises constructing a 2×2 RF I/Q up-converter using 4 RF mixers with local oscillator LO phase control.

5. The controller of claim 1 , wherein the code for generating of the digitally jointed baseband signal comprises generating a single optical carrier with a high data rate using dual side bands.

6. The controller of claim 5 , wherein the code for generating the single optical carrier comprises combining up-converted I and Q components of each of the side bands electrically for dual side band signal generation.

7. The controller of claim 6 , wherein the code for generating the single optical carrier comprises allocating one or more sets of electrical baseband signals in each of the side bands using parallel RF I/Q up-conversion.

8. The controller of claim 7 , wherein the code for generating the single optical carrier comprises using RF local oscillator LO frequencies to control spacing between each of the electrical carriers.

9. The controller of claim 1 , wherein the digitally jointed baseband signal comprises taking digitally generated electrical baseband signals as inputs to the RF up-conversion.

10. The controller of claim 1 , wherein the digitally jointed baseband signal comprises jointly generating sum/difference components of the two sidebands for simpler RF mixing.

11. The controller of claim 10 , wherein jointly generating sum/difference components comprises generating the sum/difference components in a digital domain for RF mixer and coupler reduction.

12. The controller of claim 1 , wherein the code for generating of the digitally jointed baseband signal comprises code for:

employing an optical single side-band generation using RF I/Q up-conversion to generate up-converted single side-band I and Q signal components;

generating a single optical carrier for a high data rate using dual side-bands;

combining the up-converted I and Q components of each side-band electrically with dual-bands of the optical carrier to generate electrical baseband signals; and

using the electrical baseband signals as inputs to RF up-converters of the RF I/Q up-conversion.