Recent Advances in Ultra-Compact Highly Nonlinear Fibers and Their Applications

In this paper, we review design and characteristics of recently reported down-sized highly nonlinear fibers (HNLFs) and ultra-compact HNLF modules. A Certain feasibility of down-sized HNLFs is confirmed through optical and mechanical evaluation. Furthermore, not only down-sizing, new attractive application is realized by utilizing unique mechanical characteristics of down-sized HNLF.