Negative frequency resonant radiation

Understand

Optical solitons or soliton-like states shed light to blue-shifted frequencies through a resonant emission process.

• We predict a mechanism by which a second propagating mode is generated.
• This mode, called negative resonant radiation originates from the coupling of the soliton mode to the negative frequency branch of the dispersion relation.
• Measurements in both bulk media and photonic crystal fibres confirm our predictions.