Wavelength conversion using fiber cross-phase modulation driven by two pump waves

Area of Science:

• Optics and Photonics
• Nonlinear Optics
• Optical Communications

Background:

• Wavelength conversion is crucial for optical communication systems.
• All-optical methods offer high-speed signal processing capabilities.
• Phase modulation in nonlinear fibers provides a versatile platform for wavelength manipulation.

Purpose of the Study:

• To investigate all-optical wavelength conversion using phase modulation in a fiber.
• To analyze the generation of phase-preserving signal copies with frequency shifts.
• To experimentally validate the theoretical model and assess performance metrics.

Main Methods:

• Utilizing a two-pump all-optical phase modulation model.
• Employing a 300-m highly nonlinear fiber for experimental verification.
• Analyzing conversion efficiency, bandwidth, and signal integrity.

Main Results:

• Experimental results closely match theoretical predictions.
• Achieved a conversion bandwidth exceeding 4 THz.
• Demonstrated error-free wavelength conversion for a 32-GBd polarization-division multiplexed 16QAM signal.

Conclusions:

• The proposed all-optical phase modulation technique is effective for wavelength conversion.
• The method shows promise for high-capacity wavelength-division multiplexed systems.
• The technique offers precise frequency shifting and phase preservation.