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Method and device for compensating nonlinearity of electro-absorption modulator

An electro-absorption modulator, nonlinear technology, applied in nonlinear optics, instruments, optics, etc., can solve problems such as large size, complex optical path structure, and damage to the optical path structure.

Active Publication Date: 2013-11-20
TSINGHUA UNIV
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  • Claims
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Problems solved by technology

This method additionally adds key optoelectronic devices such as light sources and modulators, the optical path structure is complex and huge, and the original optical path structure is destroyed

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  • Method and device for compensating nonlinearity of electro-absorption modulator
  • Method and device for compensating nonlinearity of electro-absorption modulator
  • Method and device for compensating nonlinearity of electro-absorption modulator

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Embodiment Construction

[0042] The following describes the embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot be construed as limiting the present invention.

[0043] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more than two, unless s...

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Abstract

The invention provides a method and a device for compensating nonlinearity of an electro-absorption modulator. A system comprises a laser, an electro-absorption modulator, a spectral filter, a preprocessing module, and an optical receiver, wherein the laser is used for generating an optical signal, the electro-absorption modulator connected with the laser is used for modulating the optical signal to obtain multi-sideband spectrum of the optical signal, the spectral filter connected with the electro-absorption modulator is used for controlling the amplitude of 0-order spectral sideband of the optical signal according to the multi-sideband spectrum so as to obtain the compensated optical signal, the processing module connected with the spectral filter is used for preprocessing the compensated optical signal, and the optical receiver connected with the preprocessing module is used for converting the preprocessed optical signal into an electrical signal and outputting the electrical signal. The method and the device have the advantages that the 0-order spectral sideband of the optical signal is processed, thus the nonlinearity of the modulator is compensated only by spectral band-stop filtering and limitation of the microwave photonic system is avoided.

Description

Technical field [0001] The invention relates to the field of microwave electronics applications, and in particular to a method and device for compensating the nonlinearity of an electro-absorption modulator. Background technique [0002] Microwave photonics is the field of processing microwave and millimeter wave signals by photonics. Due to its high frequency and large bandwidth, it can break through the technical bottleneck of conventional electronic means, and has been applied to the fields of optical wireless systems, optical delay systems, microwave photonic filters, and photonics generation of radio frequency arbitrary waveforms. Electro-absorption modulator (EAM) is one of the most common electro-optic modulators, and its operating frequency can reach the millimeter wave frequency band. This type of modulator is widely used in microwave optical subsystems due to its high operating frequency, small drive voltage, low power consumption, small size, and easy integration with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01
Inventor 郑小平张国强张汉一周炳琨
Owner TSINGHUA UNIV
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