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Wavelength-switchable all optical clock recovery at 10Gbit/s based on semiconductor fiber ring laser.
Optics Express
|June 3, 2009
Summary
This study presents an all-optical clock recovery system operating at 10 gigahertz (GHz) with tunable wavelengths. The novel method ensures stable clock signal retrieval, unaffected by input data polarization changes.
Area of Science:
- Optical communications
- Photonics
- Signal processing
Background:
- All-optical clock recovery is crucial for high-speed optical networks.
- Traditional methods often face limitations with wavelength tunability and polarization sensitivity.
Purpose of the Study:
- To demonstrate a novel all-optical clock recovery technique enabling switchable wavelengths at 10 Gbps.
- To address the need for robust and flexible clock recovery in optical systems.
Main Methods:
- Utilized a ring cavity for clock signal generation.
- Employed 10 Gbps pseudo-random binary sequence (PRBS) data signals.
- Achieved wavelength switching by tuning an intra-cavity optical delay line.
Main Results:
- Obtained highly stable clock signals synchronized to the input data rate.
- Successfully demonstrated wavelength switching across eight distinct wavelengths.
- Validated the system's insensitivity to input data polarization variations.
Conclusions:
- The proposed all-optical clock recovery offers a stable, switchable-wavelength solution.
- This technique enhances flexibility and robustness for high-speed optical communication systems.
