Direct imaging of multimode interference in a channel waveguide.
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.
Campillo
A L
AL
Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974, USA. alc@ccs.nrl.navy.mil
Hsu
J W P
JW
Parameswaran
K R
KR
Fejer
M M
MM