本文關(guān)鍵詞：基于光纖參量放大器的全光信號處理技術(shù)的研究　出處：《華中科技大學(xué)》2016年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 光纖通信 參量放大器 相位敏感放大器 相位匹配 全光信號處理 先進調(diào)制碼型 參量光開關(guān)

【摘要】：光信號處理是未來超高速超大容量超長距離(3U)光傳輸?shù)年P(guān)鍵技術(shù)。傳統(tǒng)的光-電-光的信號處理方式技術(shù)已經(jīng)日臻成熟,但是系統(tǒng)結(jié)構(gòu)比較復(fù)雜,成本昂貴,功耗高,對調(diào)制速率和調(diào)制格式不透明,光電轉(zhuǎn)換效率較低,受到電子處理速度瓶頸的限制等,無法滿足未來波分復(fù)用(WDM)光網(wǎng)絡(luò)超高速光信號處理的要求。全光信號處理技術(shù)具有飛秒量級的響應(yīng)時間,功耗低,對光信號的調(diào)制速率和調(diào)制格式透明,具有廣泛的應(yīng)用前景。本論文主要研究了基于光纖參量放大器(FOPA)的全光信號處理技術(shù),包括寬帶低噪聲光放大,差分移相鍵控(DPSK)及正交移相鍵控(QPSK)信號的全光相位和幅度再生、全光波長轉(zhuǎn)換和組播技術(shù),以及相位不敏感(PI)和相位敏感(PS)參量光開關(guān),取得的主要的研究成果包括:1)基于雙泵浦單模式相位敏感光纖參量放大器(PS-FOPA)的三波模型,推導(dǎo)了輸出光信號功率和相位的解析表達式,可以直觀顯示信號光的相位敏感增益特性和階梯型相位傳遞函數(shù)。為了研究高階四波混頻過程對信號光增益的影響,建立了雙泵浦單模式PS-FOPA的七波模型,研究發(fā)現(xiàn)當雙泵浦波長間隔變化時,高階四波混頻過程中信號光和高階閑頻光之間存在相互功率轉(zhuǎn)移,因此存在最優(yōu)的雙泵浦光波長間隔以獲得最高的信號光增益。進一步地優(yōu)化雙泵浦光波長間隔和輸入功率,信號光和高階閑頻光同時出現(xiàn)增益消光比(GER)反轉(zhuǎn),可用于同時實現(xiàn)DPSK信號的全光相位再生和波長轉(zhuǎn)換功能。2)通過七波模型研究了基于雙泵浦單模式PS-FOPA實現(xiàn)DPSK全光再生的波長組播功能。通過優(yōu)化系統(tǒng)參數(shù),實現(xiàn)了一個波長到九個輸出波長的DPSK全光再生的波長組播,再生后的各組播信道的DPSK光信號Q因子提高了1.5dB以上,光信噪比(OSNR)代價降低了3dB。研究還發(fā)現(xiàn)雙泵浦單模式PS-FOPA中高階四波混頻邊帶的產(chǎn)生有助于降低泵浦光到信號光的強度調(diào)制噪聲轉(zhuǎn)移。3)基于雙共軛泵浦簡并PS-FOPA實現(xiàn)了一個波長到三個輸出波長的全光QPSK相位再生的波長組播。組播信號的相位和輸入QPSK信號光相同,優(yōu)化輸入信號光的相對相位和輸入泵浦光功率后,當誤碼率(BER)為10-3時,相位再生的QPSK信號光、組播信號1(Copy1)和組播信號2(Copy2)的OSNR代價分別降低了0.8dB、1.3dB和1.3dB。4)實驗測量了相位不敏感參量光開關(guān)的靜態(tài)響應(yīng)和動態(tài)響應(yīng)的消光比分別為24.5dB和18.8dB。使用單路徑實驗結(jié)構(gòu)測量了相位敏感參量光開關(guān)的靜態(tài)響應(yīng)消光比為18.97dB,使用雙路徑實驗結(jié)構(gòu)測量了相位敏感參量光開關(guān)的動態(tài)響應(yīng)消光比為10.84dB。建立了相位不敏感和相位敏感參量光開關(guān)的數(shù)值仿真模型,仿真結(jié)果和實驗測量結(jié)果相符。5)建立了考慮高非線性光纖(HNLF)縱向零色散波長漲落的參量光開關(guān)的數(shù)值仿真模型,研究了HNLF縱向零色散波長漲落對相位敏感參量光開關(guān)的影響。研究發(fā)現(xiàn),一般情況下縱向零色散波長漲落會降低相位敏感參量光開關(guān)的消光比,但是某些特定的縱向零色散波長分布反而有助于提升相位敏感參量光開關(guān)的消光比;縱向零色散波長漲落還會導(dǎo)致相位敏感參量光開關(guān)的非對易傳輸特性,而且與相位不敏感參量光開關(guān)對比,相位敏感參量光開關(guān)的非對易傳輸特性對縱向零色散波長漲落更加敏感;真空噪聲放大會影響參量光開關(guān)的泵浦消耗,存在最優(yōu)的輸入泵浦光功率以獲得最大的相位敏感參量光開關(guān)的消光比。
[Abstract]:Optical signal processing is the key technology of ultra high speed ultra long distance (3U) optical transmission in the future. The traditional optical electrical optical signal processing technology has matured, but the system structure is complex, high cost, high power consumption, the modulation rate and modulation format transparency, photoelectric conversion efficiency is low, by the electronic processing speed limit, can not meet the future wavelength division multiplexing (WDM) signal processing of optical network ultra high speed optical requirements. All optical signal processing technology has the response time of femtosecond, low power consumption, transparent modulation rate and modulation format of optical signal, and has a wide application prospect. This paper mainly studies the fiber optical parametric amplifier (FOPA) based on optical signal processing technology, including broadband low noise amplifier, differential phase shift keying (DPSK) and quadrature phase shift keying (QPSK) signal phase and amplitude regeneration, all-optical wavelength conversion and multicast technology, and the phase insensitive (PI) and phase sensitive (PS) parameters of optical switch, the main research achievements include: 1) double pumped single mode phase sensitive optical parametric amplifier (PS-FOPA) based on the three wave model, deduces the output light signal power and phase expressions, you can directly show the phase sensitive gain characteristics and ladder type phase signal transfer function. In order to study the influence of high order four wave mixing process of signal gain, established seven wave model of double pumped single mode PS-FOPA, it is found that when the double pump wavelength interval changes when the signal light and the high order time between power transfer between the high frequency light in order four wave mixing process, so there is an optimal double pump wavelength in order to obtain the interval signal gain the highest. Further, we optimize the wavelength interval and input power of dual pump light. Simultaneously, the gain and extinction ratio (GER) inversion of signal and high order idle frequency light can be used to realize the all-optical phase regeneration and wavelength conversion function of DPSK signal at the same time. 2) the wavelength multicast function of DPSK all-optical regeneration based on double pump single mode PS-FOPA is studied through the seven wave model. By optimizing the system parameters, we realized a wavelength multicast with wavelength to nine output wavelengths and DPSK all-optical regeneration. After regenerated, the Q factor of the DPSK optical signal of all the multicast channels increased by more than 1.5dB, and the optical signal-to-noise ratio (OSNR) cost decreased by 3dB. The study also found that double pumped single mode PS-FOPA high order four wave mixing sideband generation helps reduce noise intensity modulated pump to signal transfer. 3) based on dual conjugate pump degenerate PS-FOPA, a wavelength multicast for all optical QPSK phase regeneration of a wavelength to three output wavelengths is realized. Multicast signal phase and the input QPSK signal light is the same, the optimization of the input signal light phase and input pump power, when the bit error rate (BER) of 10-3, QPSK signal, phase regeneration signal 1 (Copy1) multicast and multicast signal 2 (Copy2) OSNR cost were reduced by 0.8dB, 1.3dB and 1.3dB. 4) the extinction ratio of the static and dynamic response of the phase insensitive optical switch is 24.5dB and 18.8dB, respectively. The static response and extinction ratio of the phase sensitive parametric optical switch are measured by a single path experiment structure. The dynamic response of the phase sensitive parametric optical switch is 10.84dB using the dual path experimental structure. The extinction ratio is 10.84dB. A numerical simulation model of phase insensitivity and phase sensitive optical switch is established, and the simulation results agree with the experimental results. 5) a numerical simulation model of parametric optical switch considering the zero dispersion wavelength fluctuation of high nonlinearity fiber (HNLF) is established. The influence of HNLF longitudinal zero dispersion wavelength fluctuation on the phase sensitive parametric optical switch is studied. The study found that under normal circumstances the longitudinal zero dispersion wavelength will reduce the fluctuation of phase sensitive parameters of the extinction ratio of optical switch, but certain longitudinal zero dispersion wavelength distribution will help to improve the phase sensitive parameters of the extinction ratio of optical switch; longitudinal zero dispersion wavelength fluctuation will cause the phase sensitive parameters of optical switch to transmission characteristics but, with phase sensitive parameters of optical switching contrast, phase sensitive parameters of optical switch to transmission characteristic is more sensitive to the longitudinal zero dispersion wavelength fluctuation; vacuum pump noise amplification will influence parameters of optical switch consumption, input pump power is optimal to obtain maximum phase sensitive parameters of the extinction ratio of optical switch.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：TN911.74
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本文編號：1346952