OPTICAL MODULATOR ELEMENT, OPTICAL TRANSMITTER, AND OPTICAL TRANSCEIVER
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United States of America Patent
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Issued Date -
Oct 24, 2024
app pub date -
Apr 4, 2024
filing date -
Apr 4, 2024
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Abstract
An optical modulator element includes a rib optical waveguide, a first thin film, a first high-concentration doped region, and a first metal electrode. The rib optical waveguide includes a rib portion having a PN junction, a P-type slab region connected to a P-type region of the rib portion, and an N-type slab region connected to an N-type region of the rib portion. The first thin film is formed on the P-type slab region and has electron affinity different from electron affinity of a material for the P-type slab region. The first high-concentration doped region is a region in the P-type slab region, the region being at a position separate from the rib portion. The first metal electrode is electrically connected to the first high-concentration doped region positioned outward in the P-type slab region having the first thin film formed over the P-type slab region.
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