More than threefold expansion of highly nonlinear photonic crystal fiber cores for low-loss fusion splicing

• Published in: Optics letters Vol. 34; no. 14; p. 2240
• Main Authors: Chen, Z, Xiong, C, Xiao, L M, Wadsworth, W J, Birks, T A
• Format: Journal Article
• Language: English
• Published: United States 15.07.2009

We have formed low-loss fusion splices from highly nonlinear (HNL) photonic crystal fibers (PCFs) with small cores and high air-filling fractions to fibers with much larger mode field diameters (MFDs). The PCF core was locally enlarged by the controlled collapse of holes around the core while keepin...