Novel light modulator based on multimode waveguide
A light modulator and waveguide light technology, applied in light guides, optics, instruments, etc., can solve the problems of limited application, single-band narrow working wavelength, etc., and achieve the effects of small size, improved extinction ratio, and improved performance
Active Publication Date: 2017-08-18
ZHEJIANG UNIV
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However, the biggest problem of the microcavity modulator is that its working wavelength is very narrow, so it needs a very good method of resonant wavelength control, which greatly limits its application
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[0044] The present invention will be further described below in conjunction with drawings and embodiments.
[0045] Such as figure 1 As shown, the optical modulator of the present invention can be an electroabsorption modulator, including an input waveguide 1, a multimode modulation structure 4, and an output waveguide 7 connected in sequence; or it can be a phase modulator, including an input waveguide connected in sequence waveguide 1 , multimode modulation structure 4 , output waveguide 7 .
[0046] Such as figure 2 As shown, the optical modulator of the present invention can also be a Mach-Zehnder interferometer MZI modulator with a multimode waveguide modulation region, including an input waveguide 1, a 1×2 power divider 2, a first forward connecting waveguide 3a, a first Interference arm 4 a , first backward connection waveguide 5 a , second forward connection waveguide 3 b , second interference arm 4 b , second backward connection waveguide 5 b , 2×1 power divider 6 ...
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Abstract
The invention discloses a novel light modulator based on a multimode waveguide. The structure of the novel light modulator is an electro-absorption modulator having a multimode modulation structure, a phase modulator having the multimode modulation structure or a Mach-Zehnder interferometer modulator having the multimode modulation structure. The multimode modulation structure comprises a mode multiplexer, a mode demultiplexer, a first multimode connection waveguide, a multimode waveguide light modulation area and a second multimode connection waveguide. According to the multimode modulation structure, the input end of the mode multiplexer acts as the input end of the multimode modulation structure, and the input end of the mode multiplexer or the output end of the mode demultiplexer acts as the output end of the multimode modulation structure. The multimode waveguide light modulation area and the mode multiplexing-de-multiplexing technology are utilized and the light is enabled to pass through the light modulation area in different modes for multiple times so that the regulation and control effect of a light field can be substantially enhanced, driving voltage can be reduced, the extinction ratio and the modulation speed and other performance can be enhanced and thus the novel light modulator is suitable for various light modulation structures and principles.
Description
technical field [0001] The invention belongs to the field of integrated optoelectronic devices, and in particular relates to a novel optical modulator based on a multimode waveguide. Background technique [0002] Optical modulator is an indispensable core device for optical communication, optical interconnection and other systems, and also a key device for realizing ultra-high capacity optical communication technology. The integrated optical modulator based on optical waveguide technology is the current mainstream technology. From the point of view of the modulation mechanism, it mainly includes the following types: the electro-optic effect of electro-optic materials, the carrier dispersion effect of semiconductor materials, and the electro-absorption effect; Absorptive amplitude modulator, amplitude modulator or phase modulator of Mach-Zehnder interferometer (MZI) structure, etc. [0003] With the increasing demand for optical communication capacity, the system puts forwa...
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IPC IPC(8): G02B6/293G02F1/01G02F1/17
CPCG02F1/011G02F1/17G02B6/2938
Inventor 戴道锌
Owner ZHEJIANG UNIV