Abstract
Modulation instability is thoroughly investigated and a simple analytical model for its power critically modifying the wave properties in terms of system parameters is derived and experimentally validated. The differences on the modulation instability gain spectrum in lossless and lossy optical fibers are analyzed based on theoretical models and numerical simulations. In particular the impact of background noise on the behavior of modulation instability is studied analytically and verified by measurements and simulations. The proposed analytical model is experimentally validated by monitoring the wave propagation along an optical fiber using a Brillouin optical time-domain analyzer. This way, the evolution of the optical signal traveling through optical fibers, especially, the pump depletion and the recurrence phenomenon are investigated.
Highlights
Optical fibers provide ideal conditions for the observation of optical nonlinear phenomena thanks to their high energy confinement, long-range guidance and low attenuation [1]
Among the different nonlinearities occurring in an optical fiber, modulation instability (MI) has interesting features that relate it to a broad range of phenomena, from producing soliton pulses [2] to supercontinuum generation [3], while being a limitation for several applications since it substantially alters the spectrum of an optical wave [1]
An important aspect to mention is that, since the depletion is oscillatory it is possible to assume that MI is dominant and the depletion induced by other processes, such as stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS), is negligible
Summary
Optical fibers provide ideal conditions for the observation of optical nonlinear phenomena thanks to their high energy confinement, long-range guidance and low attenuation [1]. Among the different nonlinearities occurring in an optical fiber, modulation instability (MI) has interesting features that relate it to a broad range of phenomena, from producing soliton pulses [2] to supercontinuum generation [3], while being a limitation for several applications since it substantially alters the spectrum of an optical wave [1]. MI generates two symmetric spectral sidebands around the pump wavelength, leading to a power exchange between pump and sidebands during the propagation along the fiber [6]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
