Integrated photonic crystal MZI modulator applied to 60 GHz ROF system

A technology that integrates photons and modulators, applied in the directions of light guides, optics, instruments, etc., can solve the problem that photonic crystal chips are difficult to apply to MZI modulators, etc., and achieve the effect of good achievability and mature processing technology.

Active Publication Date: 2013-10-02
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] The purpose of the invention is to solve the problem that it is difficult to be suitable for the MZI modulator of the 60GHz ROF system on a monolithically integrated photonic crystal chip, ther...

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  • Integrated photonic crystal MZI modulator applied to 60 GHz ROF system
  • Integrated photonic crystal MZI modulator applied to 60 GHz ROF system
  • Integrated photonic crystal MZI modulator applied to 60 GHz ROF system

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Embodiment Construction

[0040] The modulator is realized by integrating beam splitter, wave combiner, slow optical waveguide and coupling waveguide in a two-dimensional triangular lattice air hole photonic crystal, in which a 60° curved waveguide and a Beam splitter and wave combiner composed of Y-shaped structure, slow light waveguide and coupling waveguide. Among them, the two ends of the slow light waveguide are respectively connected to the beam splitter and the wave combiner through the coupling waveguide. Due to the electro-optic properties of lithium materials, the phases of the two beams of light produce a phase difference, and then they are coupled to the two arms of the wave combiner through the coupling waveguide and interfere with each other to synthesize a beam of light.

[0041] First of all, for the slow light waveguide structure, such as figure 2 shown. In the figure, a is the lattice constant, a=558nm, the radius of the air hole is 0.32a, and the refractive index is 1. The dielect...

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Abstract

The invention relates to an implementation method of an MZI (Mach Zehnder Interferometer) electrooptical modulator applied to a 60 GHz ROF (Radio-Over-Fiber) system, and the MZI electrooptical modulator is based on the integration of a two-dimensional photonic crystal beamsplitter, combiner, a slow light waveguide and a coupling waveguide. According to the invention, lithium niobate photonic crystals adopting triangular patterned media background ventage structures are adopted, the photonic crystal beamsplitter, the combiner, the slow light waveguide and the coupling waveguide are integrated on the same photonic crystal board to realize the MZI electrooptical modulation function, the beamsplitter, the combiner, the slow light waveguide and the coupling waveguide are designed to optimize the integral structure and improve the device performance so as to implement the photonic crystal MZI electrooptical modulator. The combining structure is compact and has lower modulation voltage, and is suitable for a full-gloss integrated system. The invention provides an implementation method of a subminiature efficient photonic crystal MZI electrooptical modulator for full-gloss integrated networks and ROF systems.

Description

[0001] The invention relates to a realization method of an MZI electro-optical modulator applied to a 60GHz ROF system based on the integration of a two-dimensional photonic crystal beam splitter, a wave combiner, a slow light waveguide and a coupling waveguide, and belongs to the field of modulators. Background technique [0002] MZI electro-optic modulators are the basic devices in optical communication systems such as ROF (Radio-over-Fiber) systems, chip-based optical interconnection systems, etc. MZI electro-optic modulators with smaller voltage and ultra-dense size have always been researched hotspot. In recent years, various research institutions have proposed a variety of structures, such as silicon optical modulators using pn or pin structures based on the free-carrier ion dispersion effect [Document 1. Ansheng Liu, Ling Liao, and Doron Rubin , "High-speed optical modulation based on carrier," Opt.Express, vol.15, no.2, pp.660-668, 2007, Document 2. Ling Liao, Dean Sam...

Claims

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Application Information

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IPC IPC(8): G02F1/035G02B6/125
Inventor 田慧平张艳红吴南南申冠生纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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