Controlled generation of high-intensity optical rogue waves by induced modulation instability

Hua Yang,Nengsong Chen,Chujun Zhao,Saili Zhao

doi:10.1038/srep39926

Abstract

Optical rogue waves are featured as the generation of high amplitude events at low probability in optical systems. Moreover, the formation of optical rogue waves is unpredictable and transient in photonic crystal fibers. In this paper, we put forward a method to generate high-intensity optical rogue waves in a more controlled way based on induced modulation instability, which can suppress the noise effect and hence play a leading role in the process of pulse evolution. Our numerical simulations indicate that the generation of rogue wave can be controlled when seeding at the optimal modulation frequency and the intensity of rogue wave can be enhanced with appropriate modulation depth. Further, high-intensity rogue wave can also be ejected in the fiber with a shorter propagation length by regulating the modulation depth. These results all provide a better understanding of optical rogue wave, which can contribute to the generation of tunable long-wavelength spectral components and selective excitation of mid-infrared supercontinuum.

Highlights

Optical rogue waves are featured as the generation of high amplitude events at low probability in optical systems
Optical rogue wave (RW), which is firstly discovered by Solli et al in the photonic crystal fiber (PCF), is deemed to be an optical analogue of oceanic RW because of two reasons[8]
Dudley et al demonstrated that RW generation can be enhanced by an order of magnitude through a small modulation across the input pulse envelope and suppressed through the use of a sliding frequency filter[7]; Buccoliero et al showed that the RW would not occur in any SC spectrum limited by the fiber loss[23]

Summary

Introduction

Optical rogue waves are featured as the generation of high amplitude events at low probability in optical systems. For the controlled generation of high-intensity RW, we numerically simulate the propagation of the pump and the seed launched into the anomalous dispersion regime of the PCF with 30 m length.

Results

Conclusion