Claims
- 1. A method for tunable optical pulse width generation comprising:
varying chirp of the signal of said pulse; and varying dispersion of said signal.
- 2. The method of claim 1 wherein said signal is a return-to-zero formatted signal launched into an optical system.
- 3. The method of claim 1 wherein said signal is a wavelength division multiplexed signal.
- 4. The method of claim 1 wherein pulse widths of signals on several wavelength division multiplexed channels are simultaneously tuned.
- 5. The method of claim 1 wherein said varying chirp of said signal is carried out using a phase modulator.
- 6. The method of claim 5 further comprising reducing half-wave voltages of said phase modulator providing dynamic pulse compression.
- 7. The method of claim I wherein said varying dispersion is carried out using a tunable dispersion element.
- 8. The method of claim 1 further comprising:
generating chirped return to zero pulses converging to a dispersion managed soliton format.
- 9. A system for tunable pulse width generation comprising:
a phase modulator providing chirp modulation by modulating peak to peak phase of an optical signal; and a tunable dispersion element providing chromatic dispersion to said optical signal.
- 10. The system of claim 9 wherein said tunable dispersion element is a multi-channel tunable dispersion element.
- 11. The system of claim 9 wherein said tunable dispersion element comprises a fiber Bragg grating.
- 12. The system of claim 11 wherein said fiber Bragg grating comprises a mechanically stretched, sampled, nonlinearly chirped FBG.
- 13. A system for tunable pulse width return to zero optical signal transmission comprising:
means for providing at least one optical signal; a plurality of amplitude modulators for modulating said signal; and a tunable pulse width generator comprising:
a phase modulator providing chirp modulation by modulating peak to peak phase of said optical signal; and; a tunable dispersion element providing chromatic dispersion to said optical signal.
- 14. The system of claim 13 wherein said tunable dispersion element is a multi-channel tunable dispersion element.
- 15. The system of claim 14 wherein said tunable dispersion element comprises a fiber Bragg grating.
- 16. The system of claim 15 wherein said fiber Bragg grating comprises a mechanically stretched, sampled, nonlinearly chirped FBG.
- 17. The system of claim 13 wherein said plurality of amplitude modulators comprise:
a first amplitude modulator driven by a Pseudo Random Bit Sequence; and a second amplitude modulator driven by a clock signal.
- 18. The system of claim 13 wherein said Pseudo Random Bit Sequence and said clock signal are provided by a same source.
- 19. The system of claim 17 wherein said tunable pulse width generator phase modulator is driven by said clock signal.
- 20. The system of claim 13 further comprising an optical preamplifier placed before a receiver increasing sensitivity of said receiver.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of and priority to Provisional U.S. Patent Application Serial No. 60/367,040, filed Mar. 21, 2003, entitled TUNABLE PULSE WIDTH GENERATION OF RETURN-TO-ZERO FORMAT FOR SYSTEM OPTIMIZATION, the disclosure of which is hereby incorporated herein by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60367040 |
Mar 2002 |
US |