【摘要】：為滿足光通信和無(wú)線接入網(wǎng)絡(luò)相融合的需求,學(xué)者們將微波學(xué)和光學(xué)這兩門學(xué)科之間的優(yōu)勢(shì)相互結(jié)合,便形成了一門新型交叉學(xué)科,將其稱之為微波光子學(xué)。微波光子濾波器是微波光子學(xué)領(lǐng)域的一個(gè)重要分支,它是將微波信號(hào)調(diào)制到光域中進(jìn)行光學(xué)處理,處理完的信號(hào)經(jīng)過(guò)光電探測(cè)器轉(zhuǎn)換為電信號(hào),從而實(shí)現(xiàn)對(duì)所需頻率信號(hào)的選擇或抑制。微波光子濾波器的優(yōu)點(diǎn)是濾波頻段高、體積小、損耗低、成本小、抗電磁干擾強(qiáng)、寬帶寬、低色散、高容量,可以實(shí)現(xiàn)一些電子微波濾波器所不能實(shí)現(xiàn)的功能。本論文基于受激布里淵散射研制了單通帶微波光子濾波器和陷波濾波器。 本文介紹了微波光子濾波器發(fā)展現(xiàn)狀和受激布里淵效應(yīng)的應(yīng)用,對(duì)SBS效應(yīng)的理論進(jìn)行分析,其中包括耦合波方程、布里淵增益譜、閾值,并對(duì)PM的傳輸特性、布里淵頻移量進(jìn)行了測(cè)試。 對(duì)基于相位調(diào)制器和受激布里淵散射效應(yīng)的單通帶微波光子濾波器系統(tǒng)進(jìn)行了理論分析,研究了泵浦功率變化對(duì)帶外抑制比的影響。搭建單通帶微波光子濾波器實(shí)驗(yàn)測(cè)試系統(tǒng),測(cè)試了頻率調(diào)諧范圍約為0.8-18.2GHz,3dB為26MHz,OOBR為26dB,研究了信號(hào)光功率和泵浦光功率變化對(duì)3dB帶寬及帶外抑制比的影響、以及偏振態(tài)對(duì)增益通帶的影響。 基于DDMZM和SBS效應(yīng)設(shè)計(jì)了寬調(diào)諧范圍可調(diào)諧微波光子陷波濾波器,采用頻率間隔為受激布里淵頻移量2倍的兩個(gè)泵浦信號(hào),使陷波濾波器的頻率調(diào)諧范圍達(dá)到40GHz。對(duì)直流偏置電壓引入的相位θ和受激布里淵散射增益系數(shù)G對(duì)陷波濾波器切口深度的影響進(jìn)行仿真,結(jié)果表明陷波的切口深度隨著相位θ的增大而增大,當(dāng)θ=1.502π,切口深度為65dB,θ=1.510π,切口深度為60dB,隨著G的增大而減小。
[Abstract]:In order to meet the demand of optical communication and wireless access network, the scholars combine the advantages of microwave and optics, and form a new cross-discipline, which is called microwave photonics. Microwave photonic filter is an important branch of microwave photonics. It modulates microwave signal into optical domain for optical processing. The processed signal is converted into electrical signal by photodetector. In order to achieve the desired frequency signal selection or suppression. The advantages of microwave photonic filter are high frequency band, small size, low loss, low cost, strong resistance to electromagnetic interference, wide band, low dispersion and high capacity, which can realize some functions which can not be realized by electronic microwave filter. In this paper, single pass band microwave photonic filters and notch filters are developed based on stimulated Brillouin scattering. This paper introduces the development of microwave photonic filter and the application of stimulated Brillouin effect, and analyzes the theory of SBS effect, including coupling wave equation, Brillouin gain spectrum, threshold, and the transmission characteristics of PM. Brillouin frequency shift was tested. The single-pass microwave photonic filter system based on phase modulator and stimulated Brillouin scattering is theoretically analyzed. The effect of pump power on the out-of-band rejection ratio is studied. A single pass band microwave photonic filter test system was built. The frequency tuning range was about 0.8-18.2 GHz ~ (2) dB and the frequency tuning range was 26MHz / OBR. The effects of signal power and pump power on 3dB bandwidth and out-of-band rejection ratio were studied. And the effect of polarization state on gain pass band. A tunable microwave photonic notch filter with wide tunable range is designed based on DDMZM and SBS effects. Two pump signals with a frequency interval of 2 times of the stimulated Brillouin frequency shift are used to make the tunable frequency range of the notch filter up to 40 GHz. The effect of phase 胃 and stimulated Brillouin scattering gain coefficient G on notch depth of notch filter is simulated. The results show that notch depth increases with increasing phase 胃, when 胃 = 1.502 蟺, The incision depth is 65 dB, 胃 = 1.510 蟺, and the incision depth is 60 dB, which decreases with the increase of G.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：O437.2;TN713

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本文編號(hào)：2424079