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Research and Design of integrated optical waveguide electro-optical analog - to - digital converter

Author: CaoYiPing
Tutor: ChenFuShen
School: University of Electronic Science and Technology
Course: Optical Engineering
Keywords: Electro-optical analog - to - digital converter Mach-Zehnder modulator Optical waveguide Lithium niobate LiNbO3
CLC: TN252
Type: Master's thesis
Year: 2010
Downloads: 35
Quote: 0
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Abstract


Digital signal in signal processing has many advantages, including repeat programming convenience, easy to store and nonlinearity of their own determination as to achieve long-term storage without distortion, which makes digital signal processing technology is accelerating used previously thought to be only a simulation The system can handle fields. Analog-to-digital converter key components of the binary signal as an analog voltage signal into a digital signal, and its importance is self-evident. The analog-to-digital converter to achieve high-precision, high conversion rate to become the focus of research in the field of analog-to-digital conversion. This paper begins with an overview of the waveguide electro-optical analog-to-digital converter working principle and the development of profiles of the waveguide electro-optical analog-to-digital converter with respect to the advantages of the electronic analog-to-digital converter, significance and application prospects, pointing out that the integrated optical waveguide electro-optical analog-to-digital conversion is one of the direction of the electro-optical analog-to-digital converter technologies are promising. Second, the paper analyzes the structure as the core of the MZ modulator lithium niobate optical technology to achieve high-speed analog-to-digital converter principle, the principle and structure parameters of the electrode doubling optical analog-to-digital converter. Thirdly, the paper analyzes the performance parameters of the electro-optical analog-to-digital converter, the light transit time of the analog-to-digital converter, MZ electrode doubling analog-to-digital converter using a pulsed light source and pulse jitter sampling pulse light source width of the analog-to-digital converter performance; waveguide parameters on the transmission loss of the analog-to-digital converter and analyzed. Fourth, according to the the MZ waveguide electro-optical analog-to-digital converter loss analysis results, we first designed a type of waveguide chip structure, identified by the optical waveguide pattern, with digital function expression to calculate the bending radius and thus calculate the bending loss, the most reasonable MZ waveguide structure. Secondly, set a different half-wave voltage relationship analysis study analog to digital conversion accuracy of the half-wave voltage. Then the waveguide structure and half-wave voltage, calculate the modulation bandwidth of the waveguide electro-optical analog-to-digital converter, the design structure optimization, the logical conclusion, that is designed to calculate a reasonable 2 and 4 MZ structural models The structure of the digital converter, and the structure of the analog-to-digital converter, a half-wave voltage and bandwidth are within a reasonable range. Finally, the simulation of the optical path of the two analog-to-digital converter section. In summary, the paper design of the MZ waveguide electro-optical analog-to-digital converter program, and according to the half-wave voltage and modulation bandwidth of the waveguide structure has been optimized to obtain reasonable results. The results verify the feasibility of the program.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Optical waveguide and integrated optics > Waveguide
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