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OPTICAL WAVEGUIDE, LASER INCLUDING OPTICAL WAVEGUIDE, MODULE INCLUDING OPTICAL WAVEGUIDE, AND METHOD OF MANUFACTURING OPTICAL WAVEGUIDE
OPTICAL WAVEGUIDE, LASER INCLUDING OPTICAL WAVEGUIDE, MODULE INCLUDING OPTICAL WAVEGUIDE, AND METHOD OF MANUFACTURING OPTICAL WAVEGUIDE
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机译:光学波导,包括光学波导的激光,包括光学波导的模块以及制造光学波导的方法
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摘要
PROBLEM TO BE SOLVED: To solve the problem that the increase in depth of a diffraction grating causes light scattering to bring about a loss though being able to increase a coupling coefficient (κ) of the diffraction grating.;SOLUTION: An optical waveguide includes a plurality of first optical waveguides provided with diffraction gratings and a plurality of second optical waveguides provided with no diffraction gratings, and the first optical waveguides and the second optical waveguides are alternately and repeatedly optically coupled in a propagation direction, and an effective refractive index of the first optical waveguide is lower than that of the second optical waveguide.;COPYRIGHT: (C)2013,JPO&INPIT
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