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第19卷 第1期太赫兹科学与电子信息学报Vo1.19，No.1 2021年2月 Journal of Terahertz Science and Electronic Information Technology Feb.，2021 文章编号：2095-4980(2021)01-0096-05基于二维光子晶体高Q值微波带阻滤波器司阳1，陈希1,2，陈鹤鸣*1(1.南京邮电大学 电子与光学工程学院，江苏 南京 210023；2.江苏城市职业学院 信息工程学院，江苏 南京 210036)摘 要：为提高无线通信系统的传输质量，提出一种新型的基于二维光子晶体的微波带阻滤波器，该滤波器由线缺陷波导和AAH谐振腔组成。
通过改变AAH谐振腔与主波导的距离，增加它们之间的耦合系数，从而实现1668.3μm处微波波段的滤波；基于时域有限差分法(FDTD)原理，应用Lumerical软件进行仿真计算，仿真结果表明：该滤波器性能优良，阻带中心波长为1668.3μm，阻带衰减为25.2dB，通带插入损耗为0.2dB，品质因数Q值为1.5×104，器件尺寸小，结构简单，易于大规模集成，对于超宽带通信具有重要的应用前景。
关键词：光子晶体；滤波器；AAH 谐振腔中图分类号：TN814文献标识码：A doi：10.11805/TKYDA2019520High Q-factor microwave bandstop filter based ontwo-dimensional photonic crystalSI Yang1，CHEN Xi1,2，CHEN Heming*1(1.College of Electronic and Optical Engineering，Nanjing University of Posts and Telecommunications，Nanjing Jiangsu 210023，China；2.College of Information Science & Engineering, City Vocational College of Jiangsu，Nanjing Jiangsu 210036，China)Abstract：A new microwave band-stop filter based on two-dimensional photonic crystal is proposed in order to improve the transmission quality of the wireless communication system. The filter consists of a linedefect waveguide and Aubry-Andr-Harper(AAH) resonator. By changing the distance between the AAHresonator and the main waveguide, the coupling coefficient between them is increased, and the filtering ofthe microwave band at 1668.3μm is achieved. Based on the Finite Difference Time-Domain(FDTD)principle, simulation is performed in Lumerical platform. The results show that the filter has excellentperformance: the center wavelength of the stop band is 1668.3μm, the stop band attenuation is 25.2 dB,the pass band insertion loss is 0.2 dB, and the quality factor Q value is 1.5×104. The device is of smallsize and simple structure, and it is easy to be integrated on a large scale. It has important applicationprospects for Ultra Wideband(UWB) communication.Keywords：photonic crystals；filter；AAH resonator随着宽带和超宽带通信系统的发展，由于带阻滤波器可以有效抑制不需要的宽带信号，高性能的微波带阻滤波器研究显得十分重要[1–4]。
光电器件研究与应用法拉第旋转镜辅助高阶微波光子滤波器设计王 旭，梁晓东（河南师范大学物理与信息工程学院，河南新乡 ４５３００７）摘要：在研究ＭＰＦ（微波光子滤波器）理论的基础上，针对滤波器的整体性能优化和偏振不稳定性，提出了一种基于法拉第旋转镜辅助设计的ＭＰＦ结构，得到了一个高阶结构的ＭＰＦ。
实现了同时具有高Ｑ值、高边频选择性和高阻带抑制比的可调谐带通滤波器。
采用信号流图分析了法拉第旋转镜反射光纤环延迟线结构中微波调制信号的流程，推导出了传递函数、Ｑ值表达式。
并进行了仿真，分析了耦合系数、光纤放大器增益和光纤环环长对输出谱特性的影响。
关键词：微波光子滤波器；光纤环延迟线；信号流图；法拉第旋转镜中图分类号：ＴＮ７１３．５ 文献标志码：Ａ 文章编号：１００５－８７８８（２０１３）０１－００２７－０３Ｄｅｓｉｇｎ ｏｆ ｈｉｇｈ－ｏｒｄｅｒ ＭＰＦ ａｓｓｉｓｔｅｄ ｂｙ Ｆａｒａｄａｙ ｓｐｉｎｎｉｎｇ ｍｉｒｒｏｒＷａｎｇ Ｘｕ，Ｌｉａｎｇ Ｘｉａｏｄｏｎｇ（Ｃｏｌｌｅｇｅ ｏｆ Ｐｈｙｓｉｃｓ ａｎｄ Ｉｎｆｏｒｍａｔｉｏｎ Ｅｎｇｉｎｅｅｒｉｎｇ，Ｈｅｎａｎ Ｎｏｒｍａｌ Ｕｎｉｖｅｒｓｉｔｙ，Ｘｉｎｘｉａｎｇ ４５３００７，Ｃｈｉｎａ）Ａｂｓｔｒａｃｔ：Ｉｎ ｏｒｄｅｒ ｔｏ ｏｐｔｉｍｉｚｅ ｔｈｅ ｅｎｔｉｒｅ ｐｅｒｆｏｒｍａｎｃｅｓ ｏｆ Ｍｉｃｒｏｗａｖｅ Ｐｈｏｔｏｎｉｃ Ｆｉｌｔｅｒｓ（ＭＰＦ）ａｎｄ ｔｈｅｉｒ ｐｏｌａｒｉｚａｔｉｏｎ ｓｔａｂｉｌｉｔｙ，ａＦａｒａｄａｙ ｓｐｉｎｎｉｎｇ ｍｉｒｒｏｒ－ｂａｓｅｄ ＭＰＦ ｓｔｒｕｃｔｕｒｅ ｉｓ ｐｒｅｓｅｎｔｅｄ．Ｔｈｉｓ ｔｕｎａｂｌｅ ｂａｎｄｐａｓｓ ｆｉｌｔｅｒ ｈａｓ ｈｉｇｈ Ｑｖａｌｕｅ，ｈｉｇｈ ｓｉｄｅ ｆｒｅｑｕｅｎｃｙｓｅｌｅｃｔｉｏｎ ａｎｄ ｈｉｇｈ ｓｔｏｐｂａｎｄ ｓｕｐｐｒｅｓｓｉｏｎ ｒａｔｉｏ．Ｏｎ ｔｈｅ ｂａｓｉｓ ｏｆ ｔｈｅ ｔｈｅｏｒｙ ｏｆ ＭＰＦ，ｔｈｅ ｍｉｃｒｏｗａｖｅ ｍｏｄｕｌａｔｅｄ ｓｉｇｎａｌ ｆｌｏｗ ｏｆ Ｆａｒ－ａｄａｙ ｓｐｉｎｎｉｎｇ ｍｉｒｒｏｒ ａｓｓｉｓｔｅｄ Ｆｉｂｅｒ Ｒｉｎｇ Ｄｅｌａｙ Ｌｉｎｅ（ＦＲＤＬ）ｉｓ ａｎａｌｙｚｅｄ ａｎｄ ｔｈｅ ｔｒａｎｓｆｅｒ ｆｕｎｃｔｉｏｎ ａｎｄ ｔｈｅ ｅｘｐｒｅｓｓｉｏｎ ｏｆ Ｑｖａｌｕｅｄｅｒｉｖｅｄ ｂｙ ｕｓｉｎｇ ｔｈｅ ｓｉｇｎａｌ ｆｌｏｗ ｇｒａｐｈ．Ｆｉｎａｌｌｙ，ｓｉｍｕｌａｔｉｏｎ ｉｓ ｃｏｎｄｕｃｔｅｄ ａｎｄ ｔｈｅ ｅｆｆｅｃｔｓ ｏｆ ｃｏｕｐｌｉｎｇ ｃｏｅｆｆｉｃｉｅｎｔ，ＥＤＦＡ ｇａｉｎ ａｎｄｆｉｂｅｒ ｒｉｎｇ ｌｅｎｇｔｈ ｏｎ ｔｈｅ ｏｕｔｐｕｔ ｓｐｅｃｔｒａｌ ｃｈａｒａｃｔｅｒｉｓｔｉｃｓ ａｎａｌｙｚｅｄ．Ｋｅｙ ｗｏｒｄｓ：ＭＰＦ；ＦＲＤＬ；ｓｉｇｎａｌ ｆｌｏｗ ｇｒａｐｈ；Ｆａｒａｄａｙ ｓｐｉｎｎｉｎｇ ｍｉｒｒｏｒ０ 引 言ＭＰＦ（微波光子滤波器）技术是将宽带射频信号调制到光载波上，在光纤系统中实现滤波的射频信号处理方法，具有宽带宽、低损耗、无电磁干扰和结构简单等优点，克服了电子瓶颈对采样率的限制［１－３］。
武汉光电国家实验室成功实现目前世界最高Q值的微波光子
学滤波器
佚名
【期刊名称】《光学与光电技术》
【年(卷),期】2010(8)3
【摘要】本刊讯近年来，用光学方法处理微波和毫米波信号引起了广泛关注。
相对于传统纯粹电学微波电路，微波光子学滤波器具有很多优点，比如低损耗、宽带宽、抗电磁干扰、可调谐以及重构性比较好等。
它可以直接在光域里对微波或者毫米波信号进行处理，能够融合到光纤通讯系统和光学光纤网络中。
【总页数】1页(P68-68)
【关键词】微波光子学;滤波器;国家实验室;高Q值;世界;光电;武汉;光纤通讯系统【正文语种】中文
【中图分类】TN253
【相关文献】
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因版权原因，仅展示原文概要，查看原文内容请购买。
Coherence-free cascade IIR microwave photonicfilter with high Q factorL.N.Zhou,Y.J.Cheng,E.M.Xu,U.O.Sterr,A.D.Olver and P.J.B.ClarricoatsA new high-Q infinite impulse response(IIR)microwave photonicfilter is demonstrated,in which two active recirculating delay lineloops based on a semiconductor optical amplifier(SOA)are cascaded.Due to cross-gain modulation in the SOA,interferences between lightbeams travelling along different paths are removed,ensuring stableoperation and linearity of the electrical transfer function.The wholetransfer function comprises a term representing a cascade response oftwo IIRfilters,which significantly increases the free spectral rangeand the Q factor.Thefilter exhibits a Q factor of1870with a rejectionratio of25dB.Introduction:Microwave photonicfilters are attractive because of their low losses,vanished electronic bottlenecks,immunities to electromag-netic interference(EMI),and inherent compatibilities with opticalfibre microwave systems[1].Thesefilters can be operated in eitherfinite impulse response(FIR)mode or the infinite impulse response(IIR) mode.However,the IIRfilters are preferred because they use fewer components but obtain higher Q factors and better frequency selectivity.A variety of IIRfilters have been reported,most of them based on the active recirculating delay line(RDL)[2,3].Nevertheless,the Q factor of such an IIRfilter is restricted by the amplified spontaneous emission (ASE)noise of the active component[4].Formerly,we have reported a semiconductor optical amplifier(SOA)-based IIRfilter to evade ASE noise that exhibits a Q factor of543[5].Cascading the optical processing parts of two IIRfilters is expected to increase the Q factor further by using the‘vernier effect’technique to multiply the free spectral range(FSR). However,without an especial technique,this combinedfilter will suffer from serious optical interferences between light beams travelling along different paths with equal optical distance,which leads to an instability [1]and a nonlinearity of the electrical transfer function[6,7].In this Letter,we present a combined microwave photonicfilter consist-ing of two SOA based RDL loops proposed in[5].The combinedfilter is free from optical interferences,due to cross-gain modulation(XGM)in the SOA,enabling stable operation and a linearity of the electrical transfer function.The whole transfer function comprises two terms.One term represents a cascade response of two IIRfilters,yielding a remarkable increase of FSR and Q factor.Another term represents a weak all-pass response,decreasing stopband ripple.Thefilter exhibits a Q factor of 1870with a rejection ratio of25dB.Fig.1Experiment setupEDFA:erbium-dopedfibre amplifier;SOA:semiconductor optical amplifier; MZM:Mach-Zehnder modulator;TDL:tunable delay line;TOF:tunable optical filter;PD:photodetectorExperimental setup and working principles:The experiment setup is shown in Fig.1.Two SOA based RDL loops are connected in tandem to get a cascade response.To remove interferences between light beams with equal optical distance,the central wavelength of TOF1(l2¼1559nm)is detuning from the wavelength of the modulated light(l1¼1541nm),and the central wavelength of TOF2(l3¼1562nm)is detun-ing from l2.In each loop,the input signal is inverted and copied into the ASE of the SOA in that loop,due to the XGM effect.Then the modulated ASE at the central wavelength of the TOF in that loop is extracted out as a converted signal.When that converted signal traverses the loop again and arrives at that SOA the second time,its power is small so that it cannot modulate the SOA again but is only amplified by it.Thus the circulating optical signal in each loop is an ASE signal,which is at l2in loop1and at l3in loop2.An added OC(OC3in loop1and OC4in loop2)with the coupling coefficient1/10is used to export that circulating optical signal.To ensure the XGM effect happening in loop2,an erbium-doped fibre amplifier(EDFA)is inserted between the two loops to enlarge the input power of loop2.Assuming the optical lengths of loop1and loop2are L1and L2,respect-ively,their corresponding delay time being T1and T2,the coherence lengths of the ASE light of SOA1and SOA2are l1and l2.The input optical signal is divided into multiple beams,each one traverses a different path,circulating different times in loop1or loop2.Two arbitrary beams with equal optical distance are considered here.The evolution of each beam includes XGM twice,yielding its path being partitioned by three segments.In different segments it is emitted from different optical sources.Along the path they are input laser,ASE of SOA1,and ASE of SOA2,in turn.For such two beams,despite the whole lengths of their paths being equal,the interference condition can be broken.If L1is larger than l1,the interferences will be removed when the beams are combined at the output port of loop1.If L2is larger than l2,the interfer-ences will also be removed when the beams are combined again at the output port of loop2.Because the coherence length of the ASE is very small,the interferences can be easily eliminated.It is assumed that the whole attenuation coefficient of the electrical signal amplitude in the electrical-to-optical-to-electrical conversion is j,the XGM conversion coefficients of the electrical signal on SOA1 (from l1to l2)and SOA2(from l2to l3)are k1and k2,the gains of the light by SOA1(at l2),SOA2(at l3)and the EDFA(at l2)are g1, g2and g3,respectively.Supposing the initial modulated optical signal at l1isfiltered out completely by TOF1and TOF2.But the converted ASE signal at l2is notfiltered out completely by TOF2,whose loss caused by TOF2is assumed to be l r,and its gain caused by SOA2is g r.The transfer function of the wholefilter can be deduced asH(z)=jk1k2g3400−g r l r2H2(z)+11−9g1z−1111−9g2z−12H2(z)⎛⎜⎜⎜⎜⎜⎜⎝⎞⎟⎟⎟⎟⎟⎟⎠(1)where,z1=exp(j2p T1f),z2=exp(j2p T2f),and f is the RF fre-quency.It can be seen from(1)that the whole transfer function com-prises two terms:H1(z)represents a cascade response of two IIR filters,and H2(z)represents a weak all-pass response caused by the residual inversed ASE signals at l2.Results and discussion:At the start,by tuning the TDL in loop1,the ratio of the FSR of thefirstfilter to that of the secondfilter is adjusted to11:9,as is shown in Fig.2a.In the responses of these two constitute filters,one peak of every nine peaks of thefirstfilter is aimed at a certain peak of every11peaks of the secondfilter.For the whole cascadefilter the aimed peaks are selected and other peaks are removed,as is shown in Fig.2b.Hence,the FSR of the whole cascadefilter is the minimum common multiple of the values of each constituentfilter.Furthermore, the peaks of the response of the wholefilter are sharpened along the front edge and rear edge.Thus the3dB bandwidth(D f23dB)of the wholefilter is even less than the minimum D f23dB of the two constituent filters.As a result of the increased FSR and the decreased D f23dB,the Q factor of the wholefilter is enhanced significantly.At some frequencies several side-peaks emerge out,where the peaks of thefirstfilter overlap partially with those of the secondfilter.The measured data of the whole filter(corresponding to Fig.2b)are as follows:the FSR is174.97MHz, the Q factor is833,and the rejection ratio is29dB.frequency, GHzamplitude,dBfrequency, GHzamplitude,dBa bFig.2Measured responsesa Constitutefiltersb CascadefilterELECTRONICS LETTERS23rd June2011Vol.47No.13Assume the altitudes of the peaks of the first filter and the second filter are h 1and h 2,respectively.If the whole transfer function only comprises a cascade response,the altitude of the highest side-peak should be larger than the maximum of h 1and h 2,because in this case the whole response curve is the sum of those of the constitute filters.Note that here the altitude of the highest side-peak is less than the maximum of h 1and h 2,which results from the all-pass response caused by the residual ASE signals at l 2,yielding a better stopband performance.It can be easily seen that with a smaller difference between T 2and T 1,a larger FSR and a higher Q factor of the whole filter can be reached.By carefully adjusting the loop lengths of the two constituent filters,the ratio of the FSR of the two constituent filters is set to 20:19.Fig.3shows the response of the optimised cascade filter.The measured data are as follows:FSR is 374.5MHz,and the Q factor is 1870.However,with the difference of the FSR of the two constituent filters becoming smaller,the overlapped parts of peaks in their responses are enlarged.As a result,the amplitudes of the side-peaks become larger and the rejection ratio of the whole filter turns smaller.The measured rejection ratio is decreased to be 25dB.frequency, GHza m p l i t u d e , d BFig.3Measured response of optimised cascade filterConclusions:A new IIR microwave photonic filter free from interfer-ences with high Q factor has been presented,in which two RDL loops based on a SOA are cascaded.The optical interferences are effectively removed by using XGM in a SOA.The whole transfer function represents a cascade response and a weak all-pass response.The cascade response causes a large improvement in Q factor,while the weak all-pass response causes a decrease in the stopband ripple.Acknowledgments:This work was supported by a grant from the National Basic Research Program of China (grant no.2006CB302805)and the Fundamental Research Funds for the Central Universities,China University of Geosciences (grant no.CUG090112).#The Institution of Engineering and Technology 201115January 2011doi:10.1049/el.2010.3595One or more of the Figures in this Letter are available in colour online.L.N.Zhou and Y.J.Cheng (Department of Physics,China University of Geosciences,Lu Mo Road,Wuhan,People’s Republic of China )E-mail:zln427@E.M.Xu (Wuhan National Laboratory for Optoelectronics and School of Optoelectronic Science and Engineering,Huazhong University of Science and Technology,Luo Yu Road,Wuhan,People’s Republic of China )U.O.Sterr,A.D.Olver and P.J.B.Clarricoats (Department of Electronic Engineering,Queen Mary and Westfield College,Mile End Road,London E14NS,United Kingdom )References1Capmany,J.,Ortega,B.,Pastor,D.,and Sales,S.:‘Discrete-time optical processing of microwave signals’,J.Lightwave Technol.,2005,23,(2),pp.702–7232Hunter, D.B.,and Minasian,R.A.:‘Photonic signal processing of microwave signals using an active-fiber Bragg-grating-pair structure’,IEEE Trans.Microw.Theory Tech.,1997,45,(8),pp.1463–14663Hunter,D.B.,and Minasian,R.A.:‘Microwave optical filters based on a fiber Bragg grating in a loop structure’.Proc.Int.Top.Mtg on Microwave Photonics,(MWP’06),Genoble,France,2006,pp.273–2764Zhou,L.N.,Zhang,X.L.,Xu,E.M.,and Huang,D.X.:‘Q value analysis of a first-order IIR microwave photonic filter based on SOA’,Acta Phys.Sin.,2009,58,pp.1036–10415Xu,E.M.,Zhang,X.L.,Zhou,L.N.,Zhang,Y.,Yu,Y.,Li,X.,and Huang, D.X.:‘All-optical microwave filter with high frequency selectivity based on semiconductor optical amplifier and optical filter’,J.Lightwave Technol.,2010,28,(16),pp.2358–23656Erwin,H.W.,and Minasian,R.A.:‘Reflective amplified recirculating delay line bandpass filter’,J.Lightwave.Technol.,2007,25,(6),pp.1441–14467Capmany,J.:‘On the cascade of incoherent discrete-time microwave photonic filters’,J.Lightwave Technol.,2006,24,(7),pp.2564–2578ELECTRONICS LETTERS 23rd June 2011Vol.47No.13。
基于普通介质无缺陷一维光子晶体高Q值多通道滤波器钟远聪;方云团
【期刊名称】《人工晶体学报》
【年(卷),期】2010(39)3
【摘要】设计用常规介质构成的无缺陷的一维光子晶体,用特征矩阵法研究光波在其中的传输特性。
在消逝波和传输波相互耦合的传播模式条件下,对特定的入射角度,有多个分离的高Q值频道可以让光波传播。
因此可以将该结构用作多通道高Q 值频率滤波器。
通道位置和数目可以通过入射角度和结构的周期数目进行调节。
【总页数】4页(P737-740)
【关键词】一维光子晶体;消逝波;多通道频率滤波器;特征矩阵法
【作者】钟远聪;方云团
【作者单位】嘉应学院物理与光信息科技学院;镇江船艇学院基础实验中心
【正文语种】中文
【中图分类】O734
【相关文献】
1.正负折射率含缺陷1维光子晶体多通道滤波器 [J], 熊翠秀;蒋练军;王景艳
2.基于取样FBG的可调谐多通道微波光子滤波器 [J], 王小燕;郑联慧
3.基于二维光子晶体高Q值微波带阻滤波器 [J], 司阳;陈希;陈鹤鸣
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5.含左手介质双缺陷态的一维光子晶体窄带双频滤波器 [J], 王卓远;王一刚;张德荣;陈晓明;李友明;励金祥
因版权原因，仅展示原文概要，查看原文内容请购买。
一种超高频高Q值CMOS带通滤波器设计
高志强;喻明艳;叶以正
【期刊名称】《电子器件》
【年(卷),期】2006(29)4
【摘要】介绍了一种基于Nauta跨导-电容积分器的CMOS集成滤波器设计.在滤波器设计过程中,利用改进的Nauta跨导具有可调增益、高线性度、宽频域特点,使滤波器可工作在UHF频段并有高品质因数Q,仿真结果表明,所设计的滤波器采用Charted Semiconductor Manufacturing(CSM)0.35 μmCMOS工艺,工作电压为3 V,Q值可达到40～100,当中心频率为433 MHz,Q值为40时,无杂散动态范围(SFDR)约为61.4 dB,并可通过调节电路偏压达到对中心频率ωC和Q的调谐.【总页数】4页(P992-995)
【作者】高志强;喻明艳;叶以正
【作者单位】哈尔滨工业大学微电子中心,哈尔滨,150001;哈尔滨工业大学微电子中心,哈尔滨,150001;哈尔滨工业大学微电子中心,哈尔滨,150001
【正文语种】中文
【中图分类】TN713
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