광신호 처리를 위한 광소자들의 특성 측정 및 응용 연구

Title
광신호 처리를 위한 광소자들의 특성 측정 및 응용 연구
Authors
이승훈
Keywords
광신호처리를위한광소자들의특성측정및응용연구
Issue Date
2011
Publisher
인하대학교
Abstract
This thesis focuses on study of basic photonic devices related to long-wavelength single-mode vertical-cavity surface-emitting lasers (VCSELs) and single-photon detectors for applications to high-speed signal processing and quantum communications as well as characterization of nonlinear optical materials for such applications. New simple interferometric method for measuring the second-order nonlinear optic properties of optical materials were proposed and demonstrated by confirming the known electro-optic (EO) coefficient of the lithium niobate crystals. This method was intended to measure the EO coefficient of new polymer materials for periodic poled devices for quantum entangled photon generation. In addition, a method of third order nonlinear coefficient and zero-dispersion wavelength of a highly nonlinear fiber was also demonstrated as a part of four-wave-mixing based entangled photon generation. 1.5-m wavelength single-mode VCSELs were studied for timing-jitter reduced laser pulse generation, polarization bistability, and optical flip-flop operations. These measurements were expected to be useful for all-optical high-speed two-dimensional signal-processing as well as partly for pump laser sources generating quantum correlated photons via nonlinear effects. Some works on the single-photon detectors and its application to quantum key distribution were also carried as parts of the quantum communication research. Low noise single photon detector based on InGaAs/InP APDs were developed and used for demonstration of quantum key distributions. During the course of this study I have developed basis technologies and sciences for all-optical high-speed signal processing and quantum communications.
Description
Contents Abstract …………………………………………………………………… ⅰ Acknowledgements ………………………………………………………… ⅱ Publications ………………………………………………………………… ⅳ Contents …………………………………………………………………… ⅹ List of Figures ……………………………………………………………… xii List of Tables ………………………………………………………………… xv Chapter 1. Introduction ………………………………………………………1 Chapter 2. Measurement of optical nonlinearities ……………………………4 2.1 Measurement of dispersion of electro-optic coefficient ……………4 2.1.1 Experimental setup and theoretical background ……………6 2.1.2 Measurement and data processing ………………………………9 2.1.3 Results and discussion ………………………………………12 2.2 Nonlinear coefficient of highly nonlinear optical fiber ……………16 2.2.1 Theoretical background and measurement ……………………18 2.2.2 Results and discussion …………………………………………21 2.2.3 Temperature dependence of zero dispersion wavelength …… 24 Chapter 3. Characteristics and application of 1.5-m VCSELs ……………26 3.1 Continuous wave lasing with 1.5-m single mode VCSELs ………27 3.2 Low jittered Gain-switched pulse generation ………………………29 3.2.1 Experimental setup ……………………………………………30 3.2.2 Results and discussion …………………………………………33 3.3 Polarization bistability of VCSELs ………………………………40 3.4 All optical flip-flop using polarization bistable VCSELs …………46 3.4.1 Experimental setup …………………………………………47 3.4.2 Results ………………………………………………………48 Chapter 4. InGaAs/InP APD based single photon detectors ………………55 4.1 Photon detection with InGaAs/InP SPADs ………………………55 4.2 Application to two-way quantum key distribution system ………62 4.2.1 Experimental setup……………………………………………62 4.2.2 Results and discussion…………………………………………65 Chapter 5. Summary ………………………………………………………69 References …………………………………………………………………71 List of Figures Figure 2.1 Experimental setup for measurement of the EO coefficient Figure 2.2(a) Measured interferometer output spectrum, and (b) an oscillation period curve of the interference signals calculated for the ordinary and extraordinary waves from the Fourier transformation of th
URI
http://dspace.inha.ac.kr/handle/10505/22502
Appears in Collections:
College of Natural Science(자연과학대학) > Physics (물리학) > Theses(물리학 석박사 학위논문)
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