基于Kerr非線性效應(yīng)全光邏輯門的研究
發(fā)布時間：2019-01-16 01:38
【摘要】：隨著人類社會信息化時代的臨近,對通信的需求呈現(xiàn)加速增長的趨勢。發(fā)展迅速的各種新型業(yè)務(wù)對通信網(wǎng)的帶寬和容量提出了更高的要求。在目前的半透明光網(wǎng)絡(luò)中,電子交換和信息處理網(wǎng)絡(luò)的發(fā)展已接近了極限,為了解決電子瓶頸限制問題,在未來的全光網(wǎng)絡(luò)中,全光開關(guān)將取而代之。全光開關(guān)作為實現(xiàn)全光網(wǎng)絡(luò)的基礎(chǔ)器件,在信息技術(shù)中有廣泛的應(yīng)用,其中一項重要的應(yīng)用就是用來構(gòu)成全光邏輯門,全光邏輯門在光域上能實現(xiàn)各種邏輯操作,是全光計算、全光通信傳輸系統(tǒng)等關(guān)鍵元器件。由于Kerr非線性效應(yīng),非線性耦合器能實現(xiàn)全光開關(guān)操作并能構(gòu)成相應(yīng)全光邏輯門,近年來備受關(guān)注,同時為了降低光開關(guān)的偏置功率,基于諧振腔光學(xué)雙穩(wěn)性的全光觸發(fā)開關(guān)也逐漸成為研究的熱點。因此,本文主要利用了Kerr非線性效應(yīng),對基于非線性耦合器交叉相位調(diào)制的全光邏輯門和基于諧振腔光學(xué)雙穩(wěn)性的全光觸發(fā)開關(guān)進行了研究,具體的工作和主要研究結(jié)果如下：首先,我們簡要地介紹了非線性光纖耦合器的結(jié)構(gòu),利用它的耦合模理論,對其開關(guān)特性和1所能實現(xiàn)的邏輯門操作進行了分析。同時還概述了微型諧振腔的工作原理,利用耦合器的耦合原理,分別對單耦合器和雙耦合器諧振腔進行了分析,通過仿真透射率與相移的關(guān)系曲線對各自的開關(guān)特性進行了討論。其次,我們通過合波器向耦合器輸入一束強度可調(diào)的泵浦光,用交叉相位調(diào)制方式引起Kerr非線性效應(yīng),進一步對非線性耦合器的開關(guān)特性進行了研究。利用耦合模理論,當輸入信號光的初始相位相同和不同時,通過仿真透射率與歸一化泵浦光的關(guān)系曲線,討論了各自所實現(xiàn)的全光邏輯門。研究指出：當輸入信號光的初始相位相同時,我們可以通過改變輸入泵浦光的功率,來實現(xiàn)開關(guān)功能,當取定一個泵浦光功率時,可以根據(jù)輸入信號光的不同組合來實現(xiàn)不同的全光邏輯門；當輸入信號光的初始相位不同時,可以通過改變輸入信號光的相位差,來實現(xiàn)開關(guān)功能,當取定一個特定的相位差時,同樣可以根據(jù)輸入信號光的不同組合來實現(xiàn)不同的全光邏輯門。由此可見,我們不僅可以通過改變泵浦光功率來實現(xiàn)全光開關(guān)的操作,還可以改變輸入信號光的相位差來實現(xiàn)。最后,主要介紹了基于雙耦合器諧振腔的全光觸發(fā)開關(guān),用光學(xué)雙穩(wěn)特性產(chǎn)生的Kerr非線性效應(yīng),對微型諧振腔的開關(guān)特性進行了分析。根據(jù)耦合模理論,考慮并分析了失諧量對雙穩(wěn)特性的影響,利用數(shù)值法和解析法這兩種不同的方法來求解微型腔內(nèi)的雙穩(wěn)特性曲線,研究結(jié)果表明這兩種方法得出的結(jié)果趨于一致。還分別計算了當考慮和忽略非線性損耗時的雙穩(wěn)情況,當把非線性損耗計算在內(nèi)時,通過向微型腔中摻雜鉺來獲得增益,從而來補償損耗,有效地降低了偏置信號功率。為實現(xiàn)微型諧振腔的觸發(fā)開關(guān)功能,我們在偏置信號上增加了一個設(shè)置脈沖信號或重置脈沖信號,而且其信號的持續(xù)時間要比腔內(nèi)電場建立時間要長,根據(jù)加入設(shè)置脈沖信號和重置脈沖信號之間的時間間隔,可實現(xiàn)諧振腔的開關(guān)功能,通過改變時間間隔,還可以得到不同的輸出脈沖數(shù)字序列。
[Abstract]:With the approaching of the information age of human society, the demand of communication shows the trend of accelerating growth. The rapid development of various new types of services provides for higher requirements for the bandwidth and capacity of the communication network. In the present semi-transparent optical network, the development of the electronic exchange and information processing network has reached the limit, and in order to solve the problem of the limitation of the electronic bottleneck, the full-optical switch will be replaced in the future full-optical network. the full-light switch is used as the basic device for realizing the full-optical network, and has wide application in the information technology, one of the important applications is to form a full-optical logic gate, and other key components such as a full optical communication transmission system. Because of the non-linear effect of the Kerr effect, the non-linear coupler can realize the full-light switch operation and can form the corresponding full-light logic gate. In recent years, attention has been paid, and in order to reduce the bias power of the optical switch, the full-light trigger switch based on the optical double-stability of the resonant cavity has become the hot spot of the research. Therefore, this paper mainly uses the Kerr nonlinear effect, and studies the full-light logic gate based on the cross-phase modulation of the nonlinear coupler and the full-light trigger switch based on the optical double-stability of the resonant cavity. The specific work and main research results are as follows: First, In this paper, the structure of the nonlinear optical fiber coupler is briefly introduced, and the switch characteristics and the logic gate operation which can be realized by using the coupling mode theory are analyzed. At the same time, the working principle of the micro-resonant cavity is also summarized, and the coupling principle of the coupler is used to analyze the single-coupler and the double-coupler resonant cavity respectively, and the characteristic of the switch is discussed by the relation curve of the simulation transmittance and the phase shift. Secondly, a beam of pump light with adjustable intensity is input to the coupler by a wave-in-wave device, and the nonlinear effect of Kerr is caused by the cross-phase modulation method, and the switching characteristic of the nonlinear coupler is further studied. By using the coupling mode theory, when the initial phase of the input signal light is the same and different, the relationship between the transmittance and the normalized pump light is simulated, and the full-light logic gate realized by each method is discussed. It is pointed out that when the initial phase of the input signal light is the same, the switching function can be realized by changing the power of the input pump light, and when a pump light power is taken, different full-light logic gates can be realized according to different combinations of the input signal light; When the initial phase of the input signal light is different, the switching function can be realized by changing the phase difference of the input signal light. It can be seen that not only the operation of the full-light switch can be realized by changing the pump light power, but also the phase difference of the input signal light can be changed. In the end, the paper mainly introduces the full-light trigger switch based on the double-coupler resonant cavity, and analyzes the switching characteristic of the micro-resonant cavity by the Kerr nonlinear effect generated by the optical double-stability characteristic. Based on the theory of coupled mode, the influence of detuning amount on the stability of the double stability is considered and the two different methods of the numerical method and the analytic method are used to solve the double-stable characteristic curve in the micro-cavity. The results show that the results obtained by the two methods tend to be consistent. when the non-linear loss is taken into account and ignored, the gain is obtained by doping the noise into the micro-cavity when the non-linear loss is calculated, thereby compensating for loss and effectively reducing the power of the bias signal. in order to realize the function of the trigger switch of the micro-resonant cavity, a pulse signal or a reset pulse signal is added to the bias signal, and the duration of the signal is longer than that of the electric field in the cavity, According to the time interval between the addition of the setting pulse signal and the reset pulse signal, the switching function of the resonant cavity can be realized, and different output pulse digital sequences can be obtained by changing the time interval.
【學(xué)位授予單位】：杭州電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN929.1;TN622
本文編號：2409317
[Abstract]:With the approaching of the information age of human society, the demand of communication shows the trend of accelerating growth. The rapid development of various new types of services provides for higher requirements for the bandwidth and capacity of the communication network. In the present semi-transparent optical network, the development of the electronic exchange and information processing network has reached the limit, and in order to solve the problem of the limitation of the electronic bottleneck, the full-optical switch will be replaced in the future full-optical network. the full-light switch is used as the basic device for realizing the full-optical network, and has wide application in the information technology, one of the important applications is to form a full-optical logic gate, and other key components such as a full optical communication transmission system. Because of the non-linear effect of the Kerr effect, the non-linear coupler can realize the full-light switch operation and can form the corresponding full-light logic gate. In recent years, attention has been paid, and in order to reduce the bias power of the optical switch, the full-light trigger switch based on the optical double-stability of the resonant cavity has become the hot spot of the research. Therefore, this paper mainly uses the Kerr nonlinear effect, and studies the full-light logic gate based on the cross-phase modulation of the nonlinear coupler and the full-light trigger switch based on the optical double-stability of the resonant cavity. The specific work and main research results are as follows: First, In this paper, the structure of the nonlinear optical fiber coupler is briefly introduced, and the switch characteristics and the logic gate operation which can be realized by using the coupling mode theory are analyzed. At the same time, the working principle of the micro-resonant cavity is also summarized, and the coupling principle of the coupler is used to analyze the single-coupler and the double-coupler resonant cavity respectively, and the characteristic of the switch is discussed by the relation curve of the simulation transmittance and the phase shift. Secondly, a beam of pump light with adjustable intensity is input to the coupler by a wave-in-wave device, and the nonlinear effect of Kerr is caused by the cross-phase modulation method, and the switching characteristic of the nonlinear coupler is further studied. By using the coupling mode theory, when the initial phase of the input signal light is the same and different, the relationship between the transmittance and the normalized pump light is simulated, and the full-light logic gate realized by each method is discussed. It is pointed out that when the initial phase of the input signal light is the same, the switching function can be realized by changing the power of the input pump light, and when a pump light power is taken, different full-light logic gates can be realized according to different combinations of the input signal light; When the initial phase of the input signal light is different, the switching function can be realized by changing the phase difference of the input signal light. It can be seen that not only the operation of the full-light switch can be realized by changing the pump light power, but also the phase difference of the input signal light can be changed. In the end, the paper mainly introduces the full-light trigger switch based on the double-coupler resonant cavity, and analyzes the switching characteristic of the micro-resonant cavity by the Kerr nonlinear effect generated by the optical double-stability characteristic. Based on the theory of coupled mode, the influence of detuning amount on the stability of the double stability is considered and the two different methods of the numerical method and the analytic method are used to solve the double-stable characteristic curve in the micro-cavity. The results show that the results obtained by the two methods tend to be consistent. when the non-linear loss is taken into account and ignored, the gain is obtained by doping the noise into the micro-cavity when the non-linear loss is calculated, thereby compensating for loss and effectively reducing the power of the bias signal. in order to realize the function of the trigger switch of the micro-resonant cavity, a pulse signal or a reset pulse signal is added to the bias signal, and the duration of the signal is longer than that of the electric field in the cavity, According to the time interval between the addition of the setting pulse signal and the reset pulse signal, the switching function of the resonant cavity can be realized, and different output pulse digital sequences can be obtained by changing the time interval.
【學(xué)位授予單位】：杭州電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN929.1;TN622
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