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  4. Bidirectional eigenmode propagation for large refractive index steps
 
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1993
Journal Article
Title

Bidirectional eigenmode propagation for large refractive index steps

Abstract
The bidirectional eigenmode propagation (BEP) combines the advantages of the transfer-matrix method for propagation and the mode-matching method (satisfying Maxwell's boundary conditions) at longitudinal large discontinuities for forward and backward travelling eigenvalues including discretized radiation modes. The calculated examples include a grating-assisted codirectional coupler for which 20% radiation losses have been found, and a cleaved waveguide facet with 39% reflected intensity and recapture of radiation modes due to a taperlike structure. The BEP is applicable to various types of optical passive (directional coupler, butt-coupling, taper) and active (DBR-, DFB-, and VCSE-laser, detector) devices with large refractive index differences.
Author(s)
Sztefka, G.
Nolting, H.P.
Journal
IEEE Photonics Technology Letters  
DOI
10.1109/68.215279
Language
English
Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut HHI  
Keyword(s)
  • diffraction gratings

  • directional couplers

  • eigenvalues and eigenfunctions

  • integrated optics

  • optical couplers

  • optical losses

  • optical waveguide theory

  • refractive index

  • forward travelling eigenvalues

  • laser diodes

  • active laser devices

  • photodetectors

  • dbr lasers

  • dfb lasers

  • large refractive index steps

  • bidirectional eigenmode propagation

  • transfer-matrix method

  • mode-matching method

  • maxwell's boundary conditions

  • longitudinal large discontinuities

  • backward travelling eigenvalues

  • discretized radiation modes

  • grating-assisted codirectional coupler

  • radiation losses

  • cleaved waveguide facet

  • reflected intensity

  • taperlike structure

  • directional coupler

  • butt-coupling

  • taper

  • vcse-laser

  • large refractive index differences

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