title: Construction of refractive-index profile of Ag+-Na+ ion-exchange channel waveguide by two-dimensional inverse matrix method.
abstract: The refractive-index profile of ion-exchange channel waveguide is reconstructed by near-field measurement combined with two-dimensional inverse matrix method, which can avoid the problems brought by multimeasurements and iteration smoothing in the process. The method used here has the advantages of convenient operation and accurate results for the characteristics of the asymmetric channel waveguide. It can be also applied to the refractive-index profile measurements of graded index fibers, polarization maintaining fibers, and single-mode planar waveguides.
authors.affiliation: College of Physics, Jilin University, Changchun 130023, People's Republic of China.
authors.forename: Yun-Feng
authors.initials: YF
authors.lastname: Ma
authors.forename: Jue
authors.initials: J
authors.lastname: Wei
authors.forename: Jin-Hua
authors.initials: JH
authors.lastname: Pei
authors.forename: Zhi-Hui
authors.initials: ZH
authors.lastname: Kang
authors.forename: Yun
authors.initials: Y
authors.lastname: Jiang
authors.forename: Jin-Yue
authors.initials: JY
authors.lastname: Gao