Electro-optical modulator

Abstract

The invention provides an electro-optical modulator. The electro-optical modulator comprises a substrate, a pair of optical waveguides, a pair of first electrodes and a pair of second electrodes, wherein the optical waveguides are formed in the mode of inward diffusion from a first surface of the substrate and are parallel to each other, the first electrodes are arranged on the first surface, align to the optical waveguides in position, and are matched with the optical waveguides in shape, and the second electrodes are arranged on the two sides of the first electrodes, and are parallel to the first electrodes. According to the arrangement, the electro-optical overlap integrating factor between an inter-electrode electric field between the first electrodes and the second electrodes and an optical field of lasers transmitted by the optical waveguides can be the maximum, and the situation that the electric field can cover the whole optical field can be achieved. Half-wave voltage needed by modulation is in inverse proportion to the electro-optical overlap integrating factor. Therefore, according to the arrangement, the half-wave voltage needed by the modulation can be reduced to be the minimum, and power consumption can be reduced.

Description

technical field [0001] The invention relates to a high-speed optical communication system, in particular to an electro-optic modulator. Background technique [0002] With the development of high-speed optical communication systems, electro-optic modulators have become a hot research topic. The principle of an electro-optic modulator is mainly to use the electro-optic effect to load modulated microwaves on the electrodes, and the inter-electrode electric field of the electrodes acts on the optical waveguide to change the refractive index of the optical waveguide, thereby changing the output power of the laser transmitted by the optical waveguide to realize modulation. Purpose. However, the existing electro-optic modulators require high half-wave voltage and high power consumption due to unreasonable electrode settings. Contents of the invention [0003] In view of this, it is necessary to provide an electro-optic modulator that can reduce power consumption. [0004] An e...

AI Technical Summary

Problems solved by technology

However, the existing electro-optic modulators require high half-wave voltage and high power consumption due to unreasonable electrode settings.

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