Optical device that includes optical modulator, and optical transceiver

Abstract

The invention discloses an optical device that includes an optical modulator, and the optical transceiver. The optical device includes: a substrate; an optical waveguide that forms a Mach-Zehnder interferometer; a signal electrode; and a ground electrode. The optical waveguide is placed between the signal electrode and the ground electrode.An electric field is generated in a direction along a surface of the substrate when a voltage is applied between the signal electrode and the ground electrode. The optical waveguide includes a first waveguide through which input light propagates, a curved waveguide which is optically coupled to the first waveguide, and a second waveguide which is optically coupled to the curved waveguide. The signal electrode includes first and second electrodes that are respectively placed near the first and second waveguides. An electric signal is supplied to the first electrode, and an inverted electric signal is supplied to the second electrode.

Description

technical field [0001] Embodiments discussed herein relate to an optical device including an optical modulator and an optical transceiver. Background technique [0002] figure 1 An example of a conventional optical modulator is shown. In this example, an optical modulator generates a polarization multiplexed optical signal. Thus, the optical modulator comprises a pair of female Mach-Zehnder interferometers. Each female Mach-Zehnder interferometer includes a pair of Mach-Zehnder interferometers. [0003] The optical modulator is formed on the LN substrate (or LN chip). Therefore, a Mach-Zehnder interferometer is configured by forming an optical waveguide in an LN substrate. In this example, the LN substrate is a Z-cut LN substrate. In this case, the signal electrode is formed over the optical waveguide forming the Mach-Zehnder interferometer. [0004] In the above-described optical modulator, when an electric signal is applied to the signal electrode, an electric field...

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Therefore, the quality of the transmitted signal will degrade

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