Abstract
We extend our time-transformation technique to include the delayed Raman response and use it to study propagation of ultrashort, few-cycle, optical pulses inside a dispersive nonlinear medium. Our technique deals directly with the electric field associated with an optical pulse and can be applied to pulses of arbitrary widths, as it does not make use of the slowly varying envelope approximation. We apply it to optical pulses containing several optical cycles and launched such that they form a third-order optical soliton. We vary the number of optical cycles within the pulse from 1 to 10 and study how the features such as soliton fission, intrapulse Raman scattering, and dispersive-wave generation depend on pulse width and soliton order. We find that for a fixed soliton order, the Raman-induced frequency shift becomes smaller, while the fraction of energy transferred to the dispersive wave increases, as pulse width is reduced. In the special case of a single-cycle pulse, the most dominant effect is self-steepening and it leads to dramatically different features in both the shape and spectrum of output pulses.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.