Optical Modulator and Optical Transmitter
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United States of America Patent
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Oct 24, 2024
app pub date -
Aug 12, 2021
filing date -
Aug 12, 2021
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Abstract
An EA modulator having a structure in which an increased optical confinement factor is provided. An optical modulator having a high-mesa structure made of an InP-based materials, including: a waveguide core having a multi quantum well structure; a lower selective etching layer inserted into a lower cladding at an interval from the waveguide core; and an upper selective etching layer inserted into an upper cladding at an interval from the waveguide core, where the lower selective etching layer and the upper selective etching layer are narrower than a mesa width of the high-mesa structure.
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