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1993
Journal Article
Titel
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.
Tags
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diffraction gratings
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directional couplers
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eigenvalues and eigenfunctions
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integrated optics
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optical couplers
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optical losses
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optical waveguide theory
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refractive index
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forward travelling eigenvalues
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laser diodes
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active laser devices
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photodetectors
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dbr lasers
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dfb lasers
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large refractive index steps
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bidirectional eigenmode propagation
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transfer-matrix method
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mode-matching method
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maxwell's boundary conditions
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longitudinal large discontinuities
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backward travelling eigenvalues
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discretized radiation modes
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grating-assisted codirectional coupler
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radiation losses
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cleaved waveguide facet
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reflected intensity
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taperlike structure
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directional coupler
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butt-coupling
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taper
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vcse-laser
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large refractive index differences