Experimental demonstration of the frequency shift of bandgaps in photonic crystal fibers due to refractive index scaling

Experimental demonstration of the frequency shift of photonic bandgaps due to refractive index scaling using D2O-filled hollow-core photonic crystal fibers is presented. The results confirm a simple scaling law for bandgaps in fibers in which the low-index medium is varied. (c) 2006 Optical Society of America.