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Optica Publishing Group
  • International Conference on Quantum Electronics
  • OSA Technical Digest (Optica Publishing Group, 1988),
  • paper TuP48

MODE SEPARATION PROPERTIES OF BRANCHING WAVEGUDES AND SERIES EXPANSION OF FIELD DISTRIBUTIONS

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Abstract

The branching waveguide, such as Y-junction, is one of the most basic components in guided-wave optical circuits or integrated optics. Al though the problem of branching waveguides has been discussed in several papers[1-4], any clear explanation has not been given for the mode-branching property. In this paper, mode separation properties at the waveguide junctions with sufficiently small branching angles are discussed. An interesting rule for the mode separation is derived from the analysis using the beam propagation method[5]. Also an application is proposed for the series expansion of the optical field distribution in a multimode waveguide.

© 1988 Optical Society of America

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