Competing four-wave mixing processes in dispersion oscillating telecom fiber

Area of Science:

• Nonlinear Optics
• Quantum Optics
• Fiber Optics

Background:

• Four-wave mixing (FWM) is a key nonlinear process in optical fibers.
• Quasi-phase-matching (QPM) enables efficient nonlinear interactions.
• Sideband generation is crucial for various optical applications.

Purpose of the Study:

• To experimentally study the dynamics of multiple sideband generation via QPM-FWM.
• To investigate the influence of competing FWM processes on higher-order sideband growth.
• To explore the effect of partially coherent pump sources on sideband generation efficiency.

Main Methods:

• Utilizing a dispersion-oscillating, highly nonlinear optical fiber.
• Pumping the fiber with a nanosecond microchip laser in the telecom C band.
• Operating in the normal average group-velocity dispersion regime.

Main Results:

• Higher-order sideband growth is significantly influenced by competing cascade FWM.
• Cascade FWM between pump and first-order sidebands affects sideband dynamics.
• Partially coherent pump sources drastically reduce the required average power for sideband generation.

Conclusions:

• The interplay between different FWM processes governs multiple sideband generation.
• Partially coherent pump sources offer a more power-efficient route to sideband generation.
• This research provides insights into optimizing nonlinear optical processes in fibers.