title: Direct imaging of multimode interference in a channel waveguide.
abstract: By use of a near-field scanning optical microscope in collection mode, multimode interference was directly measured in an annealed proton-exchanged LiNbO3 waveguide. Periodic transitions from a single-peaked Gaussianlike intensity distribution to a double-peaked intensity distribution were observed. The intensity distribution along the waveguide was calculated, and the results agree well with the experimental observation.
authors.affiliation: Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974, USA. alc@ccs.nrl.navy.mil
authors.forename: A L
authors.initials: AL
authors.lastname: Campillo
authors.forename: J W P
authors.initials: JW
authors.lastname: Hsu
authors.forename: K R
authors.initials: KR
authors.lastname: Parameswaran
authors.forename: M M
authors.initials: MM
authors.lastname: Fejer