Waveguide type polarization mode converter
A polarization mode and converter technology, applied in the direction of coupling of optical waveguides, can solve problems such as increasing the difficulty of design, and achieve the effects of high polarization conversion efficiency, wide size variation range, and wide application.
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[0031] Such as figure 1 As shown, the present invention includes a substrate layer 1, a cover layer 2, and a core layer. The core layer is composed of L-shaped conversion waveguides 3 which are connected to a rectangular input waveguide 4 and a rectangular output waveguide 5 whose size is different from that of the rectangular input waveguide.
[0032] The height and width of the rectangular input waveguide 4 are respectively equal to the height of the L-shaped conversion waveguide 3 and the width of the left side of its cross-section; the width and height of the rectangular output waveguide 5 are respectively equal to the width and the width of the L-shaped conversion waveguide 3 The width of the horizontal part of the lower side of the section.
[0033] The refractive index of the covering layer 2 and the cross-sectional size of the core area of the L-shaped conversion waveguide 3 make the mode polarization axis direction angle of the L-shaped conversion waveguide 3 45°.
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