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Electrooptical modulator

A technology of electro-optic modulator and modulation electrode, which is applied in the direction of instruments, optics, nonlinear optics, etc., and can solve the problem of extinction ratio drop

Inactive Publication Date: 2014-11-05
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the power of the light beams transmitted in the two branches of the Y-shaped optical waveguide often has a small difference, resulting in that when the electro-optic modulator is used as a switch, there is still a small power output in the off state, but the output power is not the maximum in the on state, and the extinction ratio ( extinction ratio) decreased

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  • Electrooptical modulator
  • Electrooptical modulator

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Embodiment Construction

[0017] see figure 1 and figure 2 , the electro-optic modulator 10 according to a preferred embodiment of the present invention, which includes a substrate 110 , a Y-shaped optical waveguide 120 , a first modulation electrode 130 , a second modulation electrode 140 and three ground electrodes 150 . The Y-shaped optical waveguide 120 is formed on the base 110 and includes a first branch 121 and a second branch 122 . The first branch 121 includes a first sub-Y-shaped optical waveguide 123, the first sub-Y-shaped optical waveguide 123 includes a first sub-branch 124 and a second sub-branch 125, the second branch 122 includes a second sub-branch The Y-shaped optical waveguide 126 , the second sub-Y-shaped optical waveguide 126 includes a third sub-branch 127 and a fourth sub-branch 128 . The second sub-branch 125 and the fourth sub-branch 128 are located on two sides of the first sub-branch 124 and the third sub-branch 127 respectively. The base 110 has a first groove 111 betwe...

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Abstract

The invention provides an electrooptical modulator. The electrooptical modulator comprises a substrate, a Y-shaped optical waveguide, a pair of first electrodes and a pair of second electrodes. The Y-shaped optical waveguide is formed on the substrate, and the first electrodes and the second electrodes are arranged on the substrate. The Y-shaped optical waveguide comprises a first branch and a second branch, the first branch comprises a first Y-shaped subsidiary optical waveguide which comprises a first sub-branch and a second sub-branch, the second branch comprises a second Y-shaped subsidiary optical waveguide which comprises a third sub-branch and a fourth sub-branch. The pair of the first electrodes and the pair of the second electrodes are used for modulating the first Y-shaped subsidiary optical waveguide and the second Y-shaped subsidiary optical waveguide respectively to enable light beams outputted by the first Y-shaped subsidiary optical waveguide and the second Y-shaped subsidiary optical waveguide to be identical in power, and accordingly extinction ratio can be increased.

Description

technical field [0001] The invention relates to a high-speed optical communication system, in particular to an electro-optical modulator. Background technique [0002] The Mach-Zehner electro-optic modulator uses the electro-optic effect to change the equivalent refractive index of one of the two branches of the Y-shaped optical waveguide by modulating the electric field, thereby changing the phase of the beam transmitted in it, making it consistent with the Y-shaped optical waveguide. There is a phase difference between the beams propagating in the other branch of the waveguide. In this way, the light beams transmitted in the two branches of the Y-shaped optical waveguide will interfere after being recombined, and the output power depends on the phase difference, that is, it is determined by the modulation electric field, so as to realize modulation. However, the power of the light beams transmitted in the two branches of the Y-shaped optical waveguide often has a small di...

Claims

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Application Information

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IPC IPC(8): G02F1/035
Inventor 黄新舜
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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