This paper presents a new communication system using optical X waves which,
in theory, can propagate to an infinite distance without spreading. In pra
ctice, when these waves are produced with a finite aperture and energy, the
y have a large depth of field. A system model using optical X waves as carr
iers to transfer signals is established. The relationship between optical X
wave and the conventional communication systems is studied. Simulation dem
onstrating the performance of the optical X wave communication systems is p
resented. (C) 1999 Elsevier Science B.V. All rights reserved.