Optical control element, optical modulation device using same, and optical transmission apparatus
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United States of America
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Mar 25, 2025
Grant Date -
May 18, 2023
app pub date -
Dec 4, 2020
filing date -
Dec 4, 2020
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Abstract
Provided is an optical control element that can minimize an optical path difference between branched waveguides while reducing a difference in structure between the branched waveguides by disposing an input portion and an output portion of an optical waveguide on the same side of a substrate on which the optical waveguide is formed. An optical control element includes a substrate 1 having an electro-optic effect, an optical waveguide 2 formed on the substrate, and a control electrode controlling a light wave propagating through the optical waveguide, in which an input portion (input light L1) and an output portion (output light L2) of the optical waveguide are formed on the same side of the substrate, the optical waveguide includes at least one Mach-Zehnder type optical waveguide portion (MZ) that has two branched waveguides (21, 22) branched from one optical waveguide and combines the two branched waveguides to form one optical waveguide, and the branched waveguides have an even number of turned-back potions (A1, A2).
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