基于QD-SOA的全光邏輯器件的研究
發(fā)布時(shí)間：2018-10-12 18:26
【摘要】：全光網(wǎng)絡(luò)作為光纖通信的重要形式,可滿足當(dāng)前人們對(duì)于大數(shù)據(jù)傳輸?shù)母邩?biāo)準(zhǔn)要求。在全光網(wǎng)絡(luò)的組成器件中,量子點(diǎn)半導(dǎo)體光放大器(QD-SOA)因有源區(qū)內(nèi)包含量子點(diǎn)而表現(xiàn)出較快的增益恢復(fù)特性,被廣泛應(yīng)用到光放大及光轉(zhuǎn)換中。除了波長(zhǎng)轉(zhuǎn)換器,基于QD-SOA可以構(gòu)建全光邏輯門器件以及全光邏輯運(yùn)算器件。根據(jù)調(diào)制方式不同,利用QD-SOA實(shí)現(xiàn)的全光邏輯器件主要分三種,采用交叉相位調(diào)制效應(yīng)(XPM)的QD-SOA全光邏輯器件較其它調(diào)制方式的QD-SOA具有消光比大、啁啾小等特點(diǎn)。本文內(nèi)容如下:1.根據(jù)QD-SOA的理論知識(shí),建立QD-SOA的靜態(tài)和動(dòng)態(tài)模型,并分別采用牛頓迭代法和四階龍格庫(kù)塔法,得到載流子濃度變化和光場(chǎng)變化的規(guī)律,這是研究QD-SOA波長(zhǎng)轉(zhuǎn)換及邏輯器件的基礎(chǔ)。2.研究了 QD-SOA-XPM的波長(zhǎng)轉(zhuǎn)換特性,分析基于XPM效應(yīng)的同相反相轉(zhuǎn)換以及相位變化特點(diǎn)。通過(guò)改變外加注入電流,可實(shí)現(xiàn)輸出的反相轉(zhuǎn)換,當(dāng)I1、I2均為40mA時(shí),轉(zhuǎn)換波形為同相輸出,當(dāng)I1為40mA,I2為10mA時(shí),轉(zhuǎn)換波形為反相輸出。此外由載流子濃度的變化規(guī)律分析相位的變化規(guī)律。3.基于QD-SOA-XPM效應(yīng)模擬實(shí)現(xiàn)了邏輯或門,研究了注入電流、τw2、輸入泵浦光功率、脈沖寬度、最大模式增益及有源區(qū)長(zhǎng)度對(duì)邏輯或門性能的影響。通過(guò)仿真分析得到:當(dāng)增大注入電流、減小τw2與最大模式增益時(shí),都可以使Q因子和消光比提高,當(dāng)增大泵浦光功率、脈沖寬度與有源區(qū)長(zhǎng)度時(shí),Q因子和消光比的變化趨勢(shì)相反,因此要權(quán)衡兩者選擇合適的泵浦光功率、脈沖寬度及有源區(qū)長(zhǎng)度。4.基于QD-SOA-XPM效應(yīng),采用邏輯異或門和邏輯與門的級(jí)聯(lián)實(shí)現(xiàn)了全光半加器。研究了注入電流、τw2、脈沖寬度、最大模式增益及有源區(qū)長(zhǎng)度對(duì)半加器性能的影響。通過(guò)仿真分析得到:減小τw2,降低脈沖寬度、減小最大模式增益,適當(dāng)減小有源區(qū)長(zhǎng)度都可以使對(duì)比度增大、碼型效應(yīng)減小,而對(duì)于外加注入電流,對(duì)比度和碼型效應(yīng)的變化規(guī)律相反,因此要適當(dāng)選擇參數(shù)。5.基于QD-SOA-XPM效應(yīng)模擬實(shí)現(xiàn)了全光半減器,采用P01 / P11作為衡量半減器性能的參數(shù),通過(guò)仿真分析外加注入電流、τw2、脈沖寬度、最大模式增益、有源區(qū)長(zhǎng)度等參數(shù)對(duì)半減器性能的影響,得到半減器性能較好的輸入?yún)?shù)。具體來(lái)講,當(dāng)注入電流為50mA,τw2為2ps,脈沖寬度為0.5ps,最大模式增益為1800m-1,有源區(qū)長(zhǎng)度為1.8mm時(shí),全光半減器的性能有改善。
[Abstract]:As an important form of optical fiber communication, all-optical network can meet the high standard of big data transmission. Quantum Dot Semiconductor Optical Amplifier (QD-SOA) is widely used in optical amplification and optical conversion because of its fast gain recovery characteristics in the active region. In addition to wavelength converters, all optical logic gate devices and all optical logic computing devices can be constructed based on QD-SOA. According to different modulation modes, there are three kinds of all-optical logic devices realized by QD-SOA. The QD-SOA all-optical logic devices with cross-phase modulation effect (XPM) have the characteristics of larger extinction ratio and less chirp than those of other modulation modes. The content of this paper is as follows: 1. According to the theoretical knowledge of QD-SOA, the static and dynamic models of QD-SOA are established, and Newton iteration method and fourth order Runge-Kutta method are used to obtain the variation of carrier concentration and light field, which is the basis of studying QD-SOA wavelength conversion and logic devices. 2. The wavelength conversion characteristics of QD-SOA-XPM are studied. The phase conversion and phase change characteristics based on XPM effect are analyzed. By changing the external injection current, the inverse phase conversion of the output can be realized. When I _ (1) I _ (2) is 40mA, the conversion waveform is in-phase output, and when I _ (1) is 40 mA ~ (2) I _ (2) is 10mA, the conversion waveform is inversely output. In addition, the variation of phase is analyzed by the variation of carrier concentration. 3. Based on the simulation of QD-SOA-XPM effect, the effects of injection current, 蟿 w _ 2, input pump power, pulse width, maximum mode gain and active region length on the performance of logic or gate are studied. The simulation results show that the Q factor and extinction ratio can be increased when the injection current is increased, the 蟿 W 2 and the maximum mode gain are decreased, and the pump power is increased. The change trend of Q factor and extinction ratio is opposite when the pulse width is compared with the active region length. Therefore, the proper pump power, pulse width and active region length should be chosen. Based on QD-SOA-XPM effect, an all-optical half-adder is implemented by using logic XOR gate and the cascade of logic and gate. The effects of injection current, 蟿 w _ 2, pulse width, maximum mode gain and active region length on the performance of the half-adder are investigated. Through simulation analysis, it is concluded that decreasing 蟿 w _ 2, pulse width, maximum mode gain and appropriate length of active region can increase the contrast and reduce the pattern effect, but for the applied injection current, Contrast and pattern effect change law is opposite, so we should choose the appropriate parameters. 5. 5. Based on the simulation of QD-SOA-XPM effect, an all-optical half-reducer is realized. P01 / P11 is used as the parameter to measure the performance of the half-reducer. The effects of the external injection current, 蟿 w _ 2, pulse width, maximum mode gain and active region length on the performance of the half-reducer are analyzed by simulation. The input parameters with good performance of the semi-reducer are obtained. Specifically, when the injection current is 50 Ma, 蟿 w 2 is 2 pss, pulse width is 0.5 pss, the maximum mode gain is 1800m-1, and the length of active region is 1.8mm, the performance of the all-optical half-demultiplexer is improved.
【學(xué)位授予單位】：曲阜師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.1
本文編號(hào)：2267152
[Abstract]:As an important form of optical fiber communication, all-optical network can meet the high standard of big data transmission. Quantum Dot Semiconductor Optical Amplifier (QD-SOA) is widely used in optical amplification and optical conversion because of its fast gain recovery characteristics in the active region. In addition to wavelength converters, all optical logic gate devices and all optical logic computing devices can be constructed based on QD-SOA. According to different modulation modes, there are three kinds of all-optical logic devices realized by QD-SOA. The QD-SOA all-optical logic devices with cross-phase modulation effect (XPM) have the characteristics of larger extinction ratio and less chirp than those of other modulation modes. The content of this paper is as follows: 1. According to the theoretical knowledge of QD-SOA, the static and dynamic models of QD-SOA are established, and Newton iteration method and fourth order Runge-Kutta method are used to obtain the variation of carrier concentration and light field, which is the basis of studying QD-SOA wavelength conversion and logic devices. 2. The wavelength conversion characteristics of QD-SOA-XPM are studied. The phase conversion and phase change characteristics based on XPM effect are analyzed. By changing the external injection current, the inverse phase conversion of the output can be realized. When I _ (1) I _ (2) is 40mA, the conversion waveform is in-phase output, and when I _ (1) is 40 mA ~ (2) I _ (2) is 10mA, the conversion waveform is inversely output. In addition, the variation of phase is analyzed by the variation of carrier concentration. 3. Based on the simulation of QD-SOA-XPM effect, the effects of injection current, 蟿 w _ 2, input pump power, pulse width, maximum mode gain and active region length on the performance of logic or gate are studied. The simulation results show that the Q factor and extinction ratio can be increased when the injection current is increased, the 蟿 W 2 and the maximum mode gain are decreased, and the pump power is increased. The change trend of Q factor and extinction ratio is opposite when the pulse width is compared with the active region length. Therefore, the proper pump power, pulse width and active region length should be chosen. Based on QD-SOA-XPM effect, an all-optical half-adder is implemented by using logic XOR gate and the cascade of logic and gate. The effects of injection current, 蟿 w _ 2, pulse width, maximum mode gain and active region length on the performance of the half-adder are investigated. Through simulation analysis, it is concluded that decreasing 蟿 w _ 2, pulse width, maximum mode gain and appropriate length of active region can increase the contrast and reduce the pattern effect, but for the applied injection current, Contrast and pattern effect change law is opposite, so we should choose the appropriate parameters. 5. 5. Based on the simulation of QD-SOA-XPM effect, an all-optical half-reducer is realized. P01 / P11 is used as the parameter to measure the performance of the half-reducer. The effects of the external injection current, 蟿 w _ 2, pulse width, maximum mode gain and active region length on the performance of the half-reducer are analyzed by simulation. The input parameters with good performance of the semi-reducer are obtained. Specifically, when the injection current is 50 Ma, 蟿 w 2 is 2 pss, pulse width is 0.5 pss, the maximum mode gain is 1800m-1, and the length of active region is 1.8mm, the performance of the all-optical half-demultiplexer is improved.
【學(xué)位授予單位】：曲阜師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.1
【參考文獻(xiàn)】
相關(guān)期刊論文 前6條
1 ;Quantum computation on gate-defined semiconductor quantum dots[J];Chinese Science Bulletin;2012年16期
2 趙梓森;;光纖通信的過(guò)去、現(xiàn)在和未來(lái)[J];光學(xué)學(xué)報(bào);2011年09期
3 胡越;李培麗;;全光半減器的研究進(jìn)展[J];半導(dǎo)體光電;2011年01期
4 D.Bimberg;C.Meuer;M.Lmmlin;S.Liebich;J.Kim;A.Kovsh;I.Krestnikov;G.Eisenstein;;Nonlinear properties of quantum dot semiconductor optical amplifiers at 1.3μm Invited Paper[J];Chinese Optics Letters;2008年10期
5 胡振華,黃德修;半導(dǎo)體光放大器的非簡(jiǎn)并時(shí)延四波混合理論[J];光學(xué)學(xué)報(bào);2004年08期
6 孫軍強(qiáng),張新亮,陳娟,黃德修,易河清;基于半導(dǎo)體光放大器四波混頻波長(zhǎng)轉(zhuǎn)換的理論研究[J];電子學(xué)報(bào);1999年11期
相關(guān)博士學(xué)位論文 前3條
1 覃翠;半導(dǎo)體光放大器的載流子動(dòng)態(tài)特性研究[D];華中科技大學(xué);2013年
2 吳兆喜;基于半導(dǎo)體光放大器（SOA）的波長(zhǎng)轉(zhuǎn)換技術(shù)研究[D];廈門大學(xué);2008年
3 羅瑩;半導(dǎo)體量子點(diǎn)電子結(jié)構(gòu)的理論研究[D];北京師范大學(xué);1999年
相關(guān)碩士學(xué)位論文 前3條
1 李雯;基于QD-SOA-XPM的全光波長(zhǎng)轉(zhuǎn)換器的研究[D];曲阜師范大學(xué);2016年
2 陳廷廷;基于XGM的QD-SOA全光波長(zhǎng)轉(zhuǎn)換特性的研究[D];曲阜師范大學(xué);2015年
3 余建興;基于量子點(diǎn)半導(dǎo)體光放大器交叉增益調(diào)制效應(yīng)的全光邏輯門研究[D];西南交通大學(xué);2011年
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