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Extinction Ratio in Optical Two-Guide-Coupler Delta Beta Switches with AsymmetricDetuning

机译:具有非对称丢失的光学双导向耦合器Delta Beta开关的消光比

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Two-guide asymmetrically detuned delta beta optical coupler switches with twoequal length sections that operate as on-off switches are examined by means of the exact eigenmodes of a slab waveguide model of the coupler. The input/output guide configurations analyzed are case (1) where a single output guide is connected to the same guide of the coupler as the input guide, and case (2) where a single output guide is connected to the coupled guide. For both cases, 'ideal' switching, i.e., complete extinction in the off state, can be obtained in the two-section delta beta coupler over a wide range of coupler lengths. The results differ from those of conventional coupled-mode theory in that when the two sections of the coupler are anti-symmetrically detuned. Reprints. (r.r.h.)

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