Accession Number : ADP008083

Title :   Simulations of Optical Leaky Waveguide Structures by the Vector Beam Propagation Method,

Corporate Author : WATERLOO UNIV (ONTARIO)

Personal Author(s) : Xu, C. L. ; Huang, W. P. ; Chaudhuri, S. K.

Report Date : APR 1992

Pagination or Media Count : 2

Abstract : Leaky waveguide structures have received great interest lately and several novel devices based on the leaky waveguides have been proposed and demonstrated. For instance, the low-loss ARROW devices have been fabricated on various materials and can be used as a polarizer. ARROW or Bragg-reflection waveguides (BRW) can be used to build strongly coupled directional couplers with large separation. The leaky waveguide structures can also be used in the detector design to achieve efficient absorption. Strictly speaking, no spatial steady modes can be supported by a leaky waveguide. The propagation of electromagnetic wave in the leaky waveguide is a spatial transient state that evolves from the excitation at the input to the radiated modes. The leaky modes can be used to describe this process approximately provided the radiation loss is small. The beam propagation method is an ideal method to simulate the propagation and radiation of the electromagnetic wave of the leaky waveguides. Since most leaky waveguides are polarization sensitive, the conventional scalar BPM is not sufficient. This has been overcome in the newly developed finite-difference vector beam propagation method (FD-VBPM).

Descriptors :   *OPTICAL WAVEGUIDES, DIRECTIONAL, EXCITATION, INPUT, LOW LOSS, MATERIALS, POLARIZATION, POLARIZERS, RADIATION, REFLECTION, SEPARATION, STRUCTURES, TRANSIENTS, RADIATION ABSORPTION, CANADA, BRAGG ANGLE, WAVEGUIDE COUPLERS, LIGHT TRANSMISSION, OPTICAL DETECTORS.

Subject Categories : Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE