A group from Cornell University will perform theoretical and experimental studies of a qualitatively new approach to ultrashort pulse-generation: self-similar pulse shaping. This regime is remarkable because monotonically-evolving, asymptotic solutions of the governing wave equation exist inside a laser, despite the requirement that the field reproduce itself after each traversal of the cavity. Self-similar pulses exist with much greater energies than can be produced stably by other means.
Specific objectives of this work include * the development of complete understanding of a mode-locked laser in which the pulse undergoes large changes as it traverses the laser cavity * optimization of the performance of self-similar fiber lasers * the demonstration of femtosecond fiber lasers that offer performance comparable to, and even exceding, that of solid-state lasers
Broader Impacts
The impact of the proposed research extends well beyond fiber lasers. The concepts developed in this project will bear on a range of topics, from the fundamental science of nonlinear dynamical systems to commercial laser instruments.
Fiber lasers that generate femtosecond-duration optical pulses have great potential for expanding the range of short-pulse optical techniques into real-world applications such as machining, and diagnosis and treatment of disease, for example. Self-similar fiber lasers have clear commercial potential. The performance of solid-state lasers can also be enhanced substantially by this concept.
The student working on this project will gain experience ranging from theory and numerical simulations to the most technical aspects of fiber optics.
