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A function multiplexing integrated lithium niobate waveguide optical modulator

A technology that integrates lithium niobate and multiplexes functions. It is applied in the direction of instruments, light guides, and optics. It can solve problems such as increasing system complexity and cost, system stability, and impact on expected effects, and achieves low half-wave voltage and high polarization. Extinction ratio, the effect of overcoming system performance limitations

Active Publication Date: 2022-03-11
BEIJING UNIV OF TECH
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Problems solved by technology

[0004] However, the use of a large number of discrete devices increases the complexity and cost of the system, and even affects the stability and expected effect of the system because the devices are connected by optical fibers

Method used

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  • A function multiplexing integrated lithium niobate waveguide optical modulator
  • A function multiplexing integrated lithium niobate waveguide optical modulator
  • A function multiplexing integrated lithium niobate waveguide optical modulator

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited to these embodiments.

[0015] Such as figure 1 As shown, this embodiment includes an input optical fiber 1, a U-groove fiber fixing device 2, a lithium niobate chip 3, a waveguide 4, an electrode 5, a V-groove fiber fixing device 6, and an output fiber 7 arranged in sequence along the beam transmission direction. The input fiber 1 is a panda-type polarization-maintaining fiber, which is aligned with the fixed axis of the waveguide 4 through the U-groove fiber fixing device 2. Therefore, when the input fiber 1 is aligned with the waveguide 4, the slow axis of the input fiber 1 (that is, the connection direction of the two cat's eyes) and the Z-axis (optical axis) of the lithium niobate waveguide chip 3 are guaranteed to be aligned. During the transmission process of the waveguide 4, the polarization direc...

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Abstract

A function multiplexing integrated lithium niobate waveguide optical modulator belongs to the application fields of optoelectronics, optical communication, microwave photonics and the like. Including input optical fiber, lithium niobate waveguide chip and output optical fiber, wherein the lithium niobate waveguide chip is composed of beam splitting coupling area, intensity modulation area, and phase modulation area, and the beam splitting coupling area adopts a cascaded Y branch structure with a straight waveguide of a specific length , divide one light into multiple light and enter the intensity modulation area; the intensity modulation area adopts Mach-Zehnder interferometer structure, and the phase modulation area after the intensity modulation area uses straight waveguide and coplanar electrode array to realize the phase modulation of each channel. The invention organically integrates the beam splitter, the intensity modulator and the phase modulator into one chip, which not only overcomes the problems of large system volume, poor performance and high cost caused by the complex connection of independent devices, but also can realize the beam splitting and coupling of light , selective optical switch, phase modulation, sideband modulation and other functions are the development trend of integrated optics in the future.

Description

technical field [0001] The invention is an integrated electro-optical modulation device with multiple functions such as light-collecting beam-splitting coupling, phase modulation, and intensity modulation, and belongs to the application fields of optoelectronics, optical communication, and microwave photonics. Background technique [0002] With the continuous maturity of semiconductor technology, the performance of semiconductor optoelectronic devices has been greatly improved, and the volume has become smaller and smaller, which has promoted the rapid development of integrated optics. Lithium niobate crystal has good electro-optic effect and is one of the preferred materials for electro-optic modulators. In recent years, electro-optic modulators based on lithium niobate waveguides have been widely used in signal modulation and coding in optical communications, and in microwave photonics. Microwave frequency conversion and laser coherent combination and phase control in lase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/035G02F1/03G02F1/21G02B6/125
CPCG02F1/0316G02F1/035G02F1/21G02B6/125G02B2006/12142G02B2006/1204G02F1/212
Inventor 王大勇杨锋王云新杨登才张弘骉戎路赵洁
Owner BEIJING UNIV OF TECH
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