Exploiting wave breaking asymmetry for broadband cascaded ANDi-supercontinuum generation

Area of Science:

• Nonlinear optics
• Fiber optics

Background:

• Broadening optical spectra is crucial for applications like spectroscopy and optical communications.
• Conventional methods often face limitations in spectral width enhancement or require complex setups.

Purpose of the Study:

• To present a novel method for substantial spectral broadening using an all-normal dispersion fiber cascade.
• To investigate the underlying physics, particularly the role of optical wave breaking (OWB) asymmetry.
• To explore parameter optimization for practical applications.

Main Methods:

• Numerical simulations of pulse propagation in a cascaded all-normal dispersion fiber system.
• Analysis of spectral evolution and the influence of optical wave breaking (OWB).
• Investigation of parameters such as input peak power and pulse length.

Main Results:

• Achieved substantial spectral width increase compared to individual fibers.
• Demonstrated that asymmetric optical wave breaking (OWB) is key to utilizing low-dispersion regions.
• Identified pulse length as a tunable parameter to avoid short fiber lengths while maintaining a low-noise regime.
• Showcased that optimal configurations yield high coherence and low noise output.

Conclusions:

• The proposed all-normal dispersion fiber cascade is an effective method for significant spectral broadening.
• Asymmetric optical wave breaking (OWB) provides a mechanism to enhance spectral width in normal dispersion fibers.
• The method offers tunability and maintains high output quality, making it promising for practical applications.