本文選題：時(shí)間透鏡 + 時(shí)頻轉(zhuǎn)換　； 參考：《湖北師范大學(xué)》2017年碩士論文

【摘要】：對(duì)超短光脈沖信號(hào)的處理是當(dāng)今學(xué)術(shù)界普遍關(guān)注的研究熱點(diǎn),超短光脈沖廣泛應(yīng)用于通信、檢測(cè)以及成像等方面。超短光脈沖的生成及其對(duì)超短光脈沖的處理極為有用。時(shí)間透鏡是一種新型的光信號(hào)處理設(shè)備,在光處理系統(tǒng)中有著極為重要的作用。時(shí)間透鏡既可以運(yùn)用在超短光脈沖的信號(hào)產(chǎn)生方面,也可以對(duì)超短光脈沖信號(hào)起放大、縮小的作用,讓其在時(shí)域上面能更容易的被檢測(cè)和處理,降低了測(cè)量?jī)x器的精度�；跁r(shí)間透鏡的成像系統(tǒng)能對(duì)超短光脈沖信號(hào)實(shí)施高速的變換,也能夠產(chǎn)生超短光脈沖信號(hào),在很多領(lǐng)域都能被有效利用�；跁r(shí)間透鏡的傅里葉系統(tǒng)能夠?qū)⑿盘?hào)的時(shí)域直接轉(zhuǎn)換為頻域輸出,進(jìn)行實(shí)時(shí)傅里葉變換,能夠用示波器等儀器直接觀察信號(hào)頻譜,同時(shí)該系統(tǒng)能夠在頻域的角度對(duì)信號(hào)進(jìn)行濾波、調(diào)制和其他方面的應(yīng)用,能夠更好的對(duì)信號(hào)展開(kāi)深層次的研究。我們主要利用OptiSystem實(shí)驗(yàn)平臺(tái),對(duì)超短光脈沖進(jìn)行了時(shí)頻轉(zhuǎn)換系統(tǒng)的仿真,模擬出了傅里葉變換系統(tǒng)和反傅里葉變換系統(tǒng)。利用時(shí)間透鏡對(duì)超短光脈沖濾波是目前很少探究的領(lǐng)域,利用傅里葉變換系統(tǒng)和反傅里葉變換系統(tǒng)在超短光脈沖的濾波方向進(jìn)行了探究以及仿真。對(duì)基于時(shí)間透鏡的時(shí)頻轉(zhuǎn)換系統(tǒng)進(jìn)行了理論分析,進(jìn)一步的利用OptiSystem平臺(tái)對(duì)得到的結(jié)論進(jìn)行了仿真,得到了很好的效果。介紹了一種實(shí)現(xiàn)超短光脈沖時(shí)域包絡(luò)的觀察方法,基于時(shí)間透鏡實(shí)現(xiàn)反傅里葉變換系統(tǒng),解決了觀察超短光脈沖的儀器精度限制,將超短光脈沖的時(shí)域信息轉(zhuǎn)換到頻域,頻域信息通過(guò)光譜儀,可以在光譜儀上得到原信號(hào)的時(shí)域信號(hào),并且分析了系統(tǒng)的可靠性和誤差來(lái)源。本文利用時(shí)間透鏡的傅里葉系統(tǒng)和反傅里葉系統(tǒng)設(shè)計(jì)了一個(gè)超短光脈沖的濾波系統(tǒng),超短光信號(hào)經(jīng)過(guò)傅里葉系統(tǒng)得到頻譜,在頻域上通過(guò)一個(gè)光開(kāi)關(guān)進(jìn)行濾波,將濾波之后的脈沖經(jīng)過(guò)反傅里葉系統(tǒng)還原原來(lái)的信號(hào)達(dá)到濾波的作用,在OptiSystem平臺(tái)上對(duì)有高頻干擾信號(hào)的雙高斯信號(hào)進(jìn)行濾波,在誤差范圍內(nèi)較好的實(shí)現(xiàn)了濾波效果。
[Abstract]:The processing of ultrashort optical pulse signal is a hot topic in academic circles. Ultrashort optical pulse is widely used in communication, detection and imaging. The generation of ultrashort optical pulse and its application in the treatment of ultrashort optical pulse are very useful. Time lens is a new type of optical signal processing equipment, which plays an important role in optical processing system. Time lens can be used not only in signal generation of ultrashort optical pulse, but also in amplification and reduction of ultrashort optical pulse signal, which makes it easier to be detected and processed in time domain and reduces the precision of measuring instrument. The imaging system based on time lens can transform ultrashort optical pulse signal at high speed and generate ultrashort optical pulse signal which can be used effectively in many fields. The Fourier system based on time lens can directly transform the signal into frequency domain output, perform real time Fourier transform, and observe the signal spectrum directly with instruments such as oscilloscope. At the same time, the system can filter, modulate and other applications in the frequency domain angle, and can better carry out the deep research on the signal. In this paper, the time-frequency conversion system of ultrashort optical pulse is simulated on the OptiSystem platform, and the Fourier transform system and the inverse Fourier transform system are simulated. Using time lens to filter ultrashort optical pulse is a rare research field at present. Fourier transform system and inverse Fourier transform system are used to investigate and simulate the direction of ultrashort optical pulse filtering. The time-frequency conversion system based on time lens is analyzed theoretically, and the conclusion is simulated by using OptiSystem platform, and the result is very good. In this paper, a method to realize the time-domain envelope of ultrashort optical pulse is introduced. The inverse Fourier transform system based on time lens is realized, which solves the limit of instrument precision of observing ultrashort optical pulse, and converts the time-domain information of ultrashort optical pulse to frequency domain. The time-domain signal of the original signal can be obtained from the spectrometer through the frequency-domain information, and the reliability and error source of the system are analyzed. In this paper, a filter system of ultrashort optical pulse is designed by using Fourier system and inverse Fourier system of time lens. The spectrum of ultrashort optical signal is obtained by Fourier system and filtered by an optical switch in frequency domain. The filtered pulse is restored to the original signal by the inverse Fourier system to filter the double Gao Si signal with high frequency interference on the OptiSystem platform. The filtering effect is better in the error range.
【學(xué)位授予單位】：湖北師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN911.7

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