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Phase synchronization scheme for a practical phase sensitive amplifier of ASK-NRZ signals
Stylianos Sygletos1, Selwan K Ibrahim, Ruwan Weerasuriya
1Tyndall National Institute and Department of Physics, University College Cork, Ireland. stylianos.sygletos@tyndall.ie
Optics Express
|July 1, 2011
Summary
A novel phase locking scheme demonstrates a practical dual pump phase sensitive amplifier for high-speed amplitude shift keying signals. This method utilizes Mach Zehnder modulators and injection locking for improved performance.
Area of Science:
- Optical Communications
- Semiconductor Lasers
- Integrated Photonics
Background:
- Phase sensitive amplifiers are crucial for high-speed optical communication systems.
- Achieving stable and efficient amplification requires precise control of pump frequencies and laser synchronization.
- Existing methods face challenges in practical implementation for high data rates like 10 Gbit/s.
Purpose of the Study:
- To present a novel phase locking scheme for a dual pump degenerate phase sensitive amplifier.
- To enable the practical demonstration of this amplifier for 10 Gbit/s non-return to zero amplitude shift keying (NRZ-ASK) signals.
- To optimize the amplifier's performance and identify key degradation factors.
Main Methods:
- Utilizing cascaded Mach Zehnder modulators to generate precise pump frequencies.
- Employing injection locking techniques to extract the signal carrier and synchronize local lasers.
- Conducting an in-depth optimization study based on measured error rate performance.
Main Results:
- Successful demonstration of a practical dual pump degenerate phase sensitive amplifier.
- Achieved stable operation for 10 Gbit/s NRZ-ASK signals.
- Identified and analyzed the primary factors limiting amplifier performance.
Conclusions:
- The proposed phase locking scheme is effective for practical dual pump phase sensitive amplifiers.
- The developed amplifier supports high-speed optical signal processing for 10 Gbit/s NRZ-ASK.
- Further optimization can mitigate identified degradation factors for enhanced performance.
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