Tilted wave emission in optical parametric oscillators induced by a bichromatic pumping

Area of Science:

• Nonlinear optics
• Quantum optics
• Laser physics

Background:

• Degenerate optical parametric oscillators (OPOs) are crucial for generating light with specific properties.
• Understanding emission dynamics in OPOs is essential for developing advanced optical sources.
• Bichromatic pumping introduces complex interactions within the OPO system.

Purpose of the Study:

• To investigate the emergence of tilted wave emission in a mean-field model of a degenerate optical parametric oscillator.
• To explore the role of bichromatic pumping and frequency offset in this phenomenon.
• To elucidate the underlying mechanism responsible for tilted wave emission.

Main Methods:

• Development of a mean-field model for a degenerate optical parametric oscillator.
• Simulation of the system under bichromatic pumping with a small frequency offset.
• Analysis of the emission characteristics and their dependence on pump parameters.

Main Results:

• Tilted wave emission was successfully identified in the mean-field model.
• The emission was linked to a nonadiabatic mechanism driven by slow pump modulation.
• Blocking either of the two pump waves resulted in the disappearance of tilted wave emission.

Conclusions:

• The study confirms tilted wave emission in a specific OPO configuration.
• Nonadiabatic dynamics induced by slow pump modulation are identified as the cause.
• The necessity of both pump waves for this emission highlights the importance of the bichromatic driving field.