Directional coupler for photonic crystals
A directional coupler and photonic crystal technology, applied in the field of couplers, can solve the problems of low integration, large volume, long coupling period, etc., and achieve the effect of high integration, small volume and compact structure
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[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0024] Such as figure 1 , 2 , 3 is a schematic structural diagram of a photonic crystal directional coupler provided by a preferred embodiment of the present invention. The photonic crystal directional coupler includes a substrate and a number of dielectric columns vertically arranged on the substrate. The plurality of dielectric columns surround two independent main waveguide defects 9 and coupling waveguide defects 10, and the main waveguide defect 9 and coupling waveguide There is a row of dielectric pillars between the line defects 10 , and the row of dielectric pillars are racetrack-shaped d...
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