OPTICAL WAVEGUIDE, OPTICAL MODULATION DEVICE AND MANUFACTURING METHOD OF OPTICAL WAVEGUIDE
PROBLEM TO BE SOLVED: To provide an optical waveguide capable of enhancing light propagation efficiency by reducing propagation loss of light due to defect formed in a concave groove.SOLUTION: The optical waveguide includes: a clad layer formed with a concave groove in a principal plane; and a core...
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Main Authors | , , |
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Format | Patent |
Language | English Japanese |
Published |
19.04.2018
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To provide an optical waveguide capable of enhancing light propagation efficiency by reducing propagation loss of light due to defect formed in a concave groove.SOLUTION: The optical waveguide includes: a clad layer formed with a concave groove in a principal plane; and a core layer which is laminated over the clad layer at the principal plane side for embedding the concave groove. Defining that, in a cross section shape of the concave groove perpendicular to extending direction of the concave groove, positions at 1/2 of depth of the concave groove as A and B, and a position that a straight line extended an a depth direction from the center of a line segment connecting A and B as C, the concave groove has a curved part which has a curvature radius of 1/5 or more of the depth of the concave groove in at least a part of portion from A to C and from B to C.SELECTED DRAWING: Figure 3
【課題】凹溝に形成された欠陥に起因する光の伝播損失を低減し、光の伝播効率を高めた光導波路の提供を目的とする。【解決手段】主面に凹溝が形成されたクラッド層と、前記クラッド層の主面側に積層され前記凹溝を埋め込むコア層と、を備え、前記凹溝は、前記凹溝の延伸方向と直交する前記凹溝の断面形状において、前記凹溝の深さの1/2の位置をA、Bとし、AとBを結んだ線分の中央から深さ方向へ直線を伸ばした位置をCとした場合、AからC、及びBからCの各部分の少なくとも一部に前記凹溝の深さの1/5以上の曲率半径を持つ曲線部を有する、光導波路。【選択図】図3 |
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Bibliography: | Application Number: JP20160200284 |