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Optical phase conjugation and pseudolinear transmission.
Aref Chowdhury1, René-Jean Essiambre
1Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, New Jersey 07974, USA. arefc@bell-labs.com
Optics Letters
|June 9, 2004
Summary
Optical phase conjugation (OPC) effectively suppresses intrachannel nonlinearities in pseudolinear transmission. This method enhances signal power by 5.5 dB without requiring signal-power evolution symmetry.
Area of Science:
- Optical Engineering
- Nonlinear Optics
- Telecommunications
Background:
- Intrachannel nonlinearities limit performance in high-speed optical fiber transmission systems.
- Pseudolinear transmission, while beneficial, is susceptible to these nonlinear effects.
- Optical phase conjugation (OPC) is a technique used to mitigate nonlinearities in optical systems.
Purpose of the Study:
- To investigate the efficacy of optical phase conjugation (OPC) in suppressing intrachannel nonlinearities.
- To demonstrate that OPC can enhance pseudolinear transmission performance.
- To explore OPC's effectiveness even without the typical requirement of signal-power evolution symmetry.
Main Methods:
- Implementing optical phase conjugation (OPC) within a pseudolinear transmission system.
- Employing appropriate dispersion mapping in conjunction with OPC.
- Testing the system over multiple spans of passive fiber (32 x 100 km).
Main Results:
- OPC effectively suppresses intrachannel nonlinearities in pseudolinear transmission.
- The combination of OPC and dispersion mapping works even without signal-power evolution symmetry.
- A significant signal power increase of 5.5 dB was observed at 40 Gbit/s.
Conclusions:
- OPC is a powerful technique for overcoming limitations imposed by intrachannel nonlinearities.
- The proposed method enhances the achievable signal power and transmission distance.
- This advancement is crucial for improving the capacity and reach of optical communication systems.