Patent
Light beam splitting apparatus
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TLDR
In this paper, a guided wave with a wave mode corresponding to an incident angle can be generated by passing through a step-wise structure and is converted into several guided waves having several modes.Abstract:
When a laser beam enters into a grating coupler at a right angle, a guided wave with a wave mode corresponding to an incident angle can be generated. Although the guided wave is a light beam in single mode, the waveguide mode is deflected by passing through a step-wise structure and is converted into several guided waves having several modes. When the guided waves are radiated from a straight output grating coupler, the radiant angle is dependent upon the waveguide mode, so beams are radiated in different directions according to their respective waveguide modes. Therefore, a guided wave in zero-order mode outputs a radiant beam having a larger radiant angle, while a guided wave in first-order mode outputs a radiant beam having a smaller radiant angle.read more
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References
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Patent
Mode splitter and magneto-optical signal detection device
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