Bragg Solitons - Historical and Future Perspectives

Solitons have been a subject of intense intellectual curiosity and an avenue for a plethora of applications since they are first observed in water waves. Optical solitons, in particular, have seen tremendous progress, starting from their first theoretical predictions in optical fiber in 1973. On the 50(th) anniversary of this seminal work from Haseagawa and Tappert, a review is provided on the progress in an important class of optical solitons, the Bragg soliton. Bragg solitons are optical solitons which exist in structures periodic in one dimension. The history of Bragg solitons is described, including the most salient advancements made both in theory and experiments. Recent progress made in integrated photonic devices and their associated design advantages are highlighted, with particular emphasis on how these have facilitated the realization of Bragg soliton dynamics on a chip and their optical processing functions. A discussion and future outlook for this burgeoning field provides a perspective on how Bragg solitons may impact the field of photonics and future applications.