title: Experimental excitation and characterization of cladding modes in photonic crystal fiber.
abstract: We extend the previous theoretical study on the effect of outer silica cladding to the analysis on real field profiles in a practical PCF. Clear field profiles for the first higher-order cladding modes are presented and discussed. The observed mode fields are reproduced by numerical calculations, and it turns out that they correspond to LP(16) mode groups. Optical properties of the observed modes such as lobe direction and polarization are also investigated. The results of this study will be useful in the design of the PCF-based optical devices utilizing cladding mode coupling.
authors.affiliation: Department of Physics, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, South Korea. sdlim@kist.re.kr
authors.forename: Sun
authors.initials: S
authors.lastname: Do Lim
authors.forename: Hyun Chul
authors.initials: HC
authors.lastname: Park
authors.forename: In-Kag
authors.initials: IK
authors.lastname: Hwang
authors.forename: Sang Bae
authors.initials: SB
authors.lastname: Lee
authors.forename: Byoung Yoon
authors.initials: BY
authors.lastname: Kim