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Polarization controller based on graphene

A polarization controller and graphene technology, applied in the field of optoelectronics, can solve the problems of difficult integration, large size of polarization controller, slow response speed, etc., and achieve the effect of easy integration, small insertion loss and fast response speed

Inactive Publication Date: 2015-06-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the above prior art, the object of the present invention is to provide a graphene-based polarization controller, and the technical problem to be solved is: the existing wave plate rotation type polarization controller is through the mechanical rotation of the wave plate, and its response The speed is slow; while the polarization controller of the electro-optic modulation type is large in size and not easy to integrate

Method used

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Embodiment

[0032] Such as figure 1 The schematic diagram of the structure, a graphene-based polarization controller, includes an insulating layer 2, located on the semiconductor substrate layer 1, and the waveguide 3 includes a first segment waveguide 31, a second segment waveguide 32, a third segment waveguide 33, The fourth section waveguide 34; the first graphene layer 41 and the second graphene layer 42 are horizontally embedded in the waveguide 3 respectively, and are isolated by the first isolation dielectric layer 61, the second isolation dielectric layer 62 and the third isolation dielectric layer 63 in sequence ; The third graphene layer 43, the fourth graphene layer 44 are vertically embedded in the waveguide 3 respectively, and are isolated by the fourth isolation dielectric layer 64, the fifth isolation dielectric layer 65 and the sixth isolation dielectric layer 66 successively; the first graphene Layer 41 and the second graphene layer 42 respectively extend from the two si...

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Abstract

The invention discloses a polarization controller based on graphene, and relates to the technical field of photoelectronics. The polarization controller is based on a traditional silicon (SOI) structure on an insulator substrate and comprises a waveguide with the graphene, a vertically embedded graphene layer is arranged on one segment in the waveguide, a horizontally embedded graphene layer is arranged on the other segment of the waveguide, and graphene in the two waveguide segments is connected through two independent electrodes. Absorption of the two waveguide segments on a TM mode (transverse magnetic mode) and a TE mode (transverse electric mode) is regulated and controlled through driving voltage applied to the graphene layers, and therefore selective output on the TE mode and the TM mode is achieved. The polarization controller has the advantages of being small in size, high in extinction ratio, small in inserting loss, high in response speed, wide in work wavelength range and capable of being integrated, and has the important application prospect in optoelectronic integration in the future.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a graphene-based polarization controller, which realizes the selective output of TE mode and TM mode. Background technique [0002] Optical fiber communication has a series of advantages, such as low loss, wide frequency bandwidth, and large capacity. It is the only way to solve the current explosive growth of data services and congestion of communication roads. However, when the single-channel transmission rate of the optical fiber communication system reaches 10Gbit / s or higher, the entire system will be very sensitive to the damage caused by the polarization effect, which includes the polarization mode dispersion of the optical fiber, the polarization-dependent loss of the passive optical device, Polarization-dependent gain in optical amplifiers and polarization-dependent modulation in optical modulators, etc. These damages are increasingly becoming the bottleneck of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01
CPCG02F1/0102G02F1/011G02F1/0136
Inventor 陆荣国叶胜威王子帅寿晓峰张雅丽张尚剑刘永
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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