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Optical modulator, modulation method and optical modulation system

A technology of optical modulator and phase modulator, applied in the field of optical modulation system, can solve the problem of large size of MZ modulator, and achieve the effect of good stability

Active Publication Date: 2019-08-20
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The application provides an optical modulator, a modulation method and an optical modulation system, which can solve the problem of large size of the MZ modulator in the related art

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  • Optical modulator, modulation method and optical modulation system
  • Optical modulator, modulation method and optical modulation system
  • Optical modulator, modulation method and optical modulation system

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Embodiment Construction

[0053] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0054] Please refer to figure 1 , figure 1 It is a structural schematic diagram of an MZ modulator provided by related technologies. The input light wave is evenly divided into two light waves by a multi-mode interference (MMI) 01, and each light wave is on a corresponding modulation arm 02. The two modulation arms 02 are parallel to each other and have the same length. After the two light waves pass through another MMI01, they are recombined, and the recombined output light wave is the modulated light wave. In actual use, the MMI in the MZ modulator is still It can be replaced by a power splitter (power splitter, PS). During the propagation of the light wave in the two modulation arms 02, if no voltage is applied to the electr...

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Abstract

The invention discloses an optical modulator, a modulation method and an optical modulation system, and belongs to the technical field of communication. The optical modulator includes: a first PR forreceiving a light wave in a first polarization mode and converting the light wave in the first polarization mode into a first sub-light wave in the first polarization mode and a second sub-light wavein a second polarization mode; a phase modulator used for modulating the light wave in the composite polarization mode, wherein the modulated light wave in the composite polarization mode comprises athird sub-light wave in the first polarization mode and a fourth sub-light wave in the second polarization mode; and a second PR used for converting a fourth sub-light wave in a second polarization mode in the modulated light waves in the composite polarization mode into a fifth sub-light wave in a first polarization mode. The intensity modulation of the light wave can be realized by one phase modulator and two PRs, and the size of the PR is generally smaller, so that the size of the light modulator is smaller.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to an optical modulator, a modulation method, and an optical modulation system. Background technique [0002] Optical fiber communication has become an important mode of modern information transmission due to its advantages of large communication capacity and wide frequency band. To realize optical fiber communication, electrical signals must be loaded onto light waves, and optical modulation is required at this time. Among them, optical modulation can be divided into direct modulation and external modulation. Optical modulation by optical modulator is a kind of external modulation. Compared with direct modulation, optical modulator has high bandwidth and small chirp (referring to the phase that changes with time) , is a key device in optical fiber communication and microwave photonic technology. [0003] At present, in the process of external modulation, a Mac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/548H04B10/54H04B10/50G02F2/00
CPCG02F2/004H04B10/505H04B10/54H04B10/548
Inventor 曹攀
Owner HUAWEI TECH CO LTD