An electro-optical modulator, a single polarization iq modulator, and a dual polarization iq modulator

Abstract

The embodiment of the invention discloses an electro-optical modulator, a single-polarization IQ modulator and a dual-polarization IQ modulator, and belongs to the technical field of optical communication. The electro-optical modulator comprises a first coupler and a second coupler, and the electro-optical modulator is used for modulating an electric signal into an optical signal. The first inputend of the first coupler serves as the input end of the electro-optical modulator, and the first output end of the second coupler serves as the output end of the electro-optical modulator. The first output end of the first coupler is connected with the first input end of the second coupler through a first optical waveguide; the second output end of the first coupler is connected with the second input end of the second coupler through a second optical waveguide, and the second output end of the second coupler is connected with the second input end of the first coupler through a third optical waveguide. According to the invention, the nonlinearity of the electro-optical modulator can be reduced.

Description

technical field [0001] The present application relates to the technical field of optical communication, in particular to an electro-optical modulator, a single-polarization IQ modulator, and a dual-polarization IQ modulator. Background technique [0002] With the development of optical communication technology, the application of optical cable in communication has been popularized. For example, more and more users use optical fiber broadband to access the Internet. When fiber optic broadband is used for Internet access, an electro-optic modulator needs to be deployed, wherein the electro-optic modulator can be used to modulate an electrical signal onto an optical signal. [0003] At present, the electro-optic modulator includes a first coupler and a second coupler, wherein the two output ends of the first coupler are respectively connected to the two input ends of the second coupler through optical waveguides, and the input ends of the first coupler As the input terminal of...

AI Technical Summary

Problems solved by technology

[0005] Based on the electro-optic modulator with the above structure, the quasi-linear region of the transfer characteristic of the electro-optic modulator is relatively small, and when a larger electrical signal is used for driving, it will cause the electro-optic modulator to perform nonlinear modulation

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