Shock wave generation triggered by a weak background in optical fibers

Area of Science:

• Nonlinear Optics
• Fiber Optics

Background:

• Dispersive shock waves (DSWs) are nonlinear phenomena occurring in various physical systems.
• Previous studies on DSWs in optical fibers often faced limitations in extension and contrast.
• The role of continuous wave (CW) backgrounds in modulating DSWs remained underexplored.

Purpose of the Study:

• To experimentally investigate the effect of a continuous wave background on short pulse dynamics in optical fibers.
• To demonstrate the enhancement of dispersive shock wave extension and contrast using this technique.
• To provide a clear explanation of the underlying spectro-temporal dynamics.

Main Methods:

• Experimental generation of dispersive shock waves from a short pulse superimposed on a weak continuous wave background in optical fibers.
• High-contrast observation of the oscillatory wave train inherent to the dispersive shock.
• Validation through numerical simulations and analysis of spectro-temporal representations.

Main Results:

• Successful observation of significantly enhanced dispersive shock waves.
• Demonstration of extended and high-contrast oscillatory wave trains, exceeding seven periods.
• Experimental results confirmed by numerical simulations, validating the observed dynamics.

Conclusions:

• A continuous wave background is an effective method for enhancing dispersive shock waves in optical fibers.
• The spectro-temporal representation offers a simple and insightful explanation for the observed nonlinear dynamics.
• This work opens avenues for controlling and utilizing enhanced DSWs in optical fiber systems.