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硅基波导、光探测器和CMOS电路的集成 总被引:1,自引:0,他引:1
对于集成光学器件和微电子电路制作,应用了驻波监控指示技术(SWAMI)、局部氧化技术(LOCOS)、光波导和探测器的平接、漏波,以及镜耦合技术。文章介绍了硅基光波导、光探测器和CMOS电路的单片集成技术。讨论了集成工艺以及静态和动态测量结果 相似文献
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本文系统描述了全耗尽短沟道LDD/LDSSOIMOSFET器件模型的电压电压特性。该模型扩展了我们原有的薄膜全耗尽SOIMOSFET模型,文中着重分析了器件进入饱和区后出现的沟道长度调制效应,及由于LDD/LDS区的存在对本征MOS器件电流特性的影响。 相似文献
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采用Cole-Hopf变换法,将平板光波导导模所满足的二阶常微分方程(Helmholtz方程)变换成一阶常微分方程(Riccati方程),用较简单且有效的方法分析导模的特性。给出了多层阶跃型及渐变型平板波导导模的精确解析解和数值解法及实例;给出了非线性平板波导传播特性的数值计算法及实例。 相似文献
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SOI材料是应用于硅基光电子学中的一种重要的光波导材料。近年来随着SOI材料制备和加工技术的成熟,SOI基光波导器件的研究日益受到人们的重视。文章介绍了SOI材料在光电子学领域的一些具体应用,包括了在热光器件、电光器件、亚微米波导器件与光纤的耦合器以及光电子集成芯片等方面的最新研究进展。更小的波导截面尺寸是未来SOI光波导器件发展的必然趋势。 相似文献
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布拉格谐振腔的分析与计算 总被引:2,自引:1,他引:2
本文采用与以往研究布拉格谐振腔不同的方法,将腔中的波纹反射段当作一段轴对称的渐变截面波导段,利用光滑渐变波导中的耦合波理论,对存在模式耦合的多模情况和不同参数的布拉格谐振腔进行了研究。得到与实验较符合的结果。同时,本文还研究了布拉格谐振腔的品质因素。 相似文献
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2).异质结IMPATT器件 IMPATT器件输出功率比GUNN器件高很多,但因雪崩倍增过程带来的固有噪声很高,从而限制了IMPATT器件在很多领域的应用。IMPATT器件要进一步提高输出功率,必须从改进效率入手,一方面要使雪崩区的宽度占整个耗尽区的比例要小,同时要寻找高化率阈值高的材料,使雪崩电压VA下降。基于这种想法,应该采用异质结结构,即用一种窄带隙的材料,(例如InP,其带隙为1.5eV),作为漂移区,由于InGaAs的离化阈值低而离化率比InP高很多,可以实现低雪崩阈值VA,降低阈值电… 相似文献
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Daoxin Dai Sailing He 《Photonics Technology Letters, IEEE》2008,20(8):599-601
This letter presents a design for diminishing the polarization-dependency of a Si nanowire-based multimode interference (MMI) coupler by using a tapered MMI section. The entrance width and waist width of the tapered MMI section are optimized to obtain a polarization-insensitive MMI length for N-fold self-imaging. The MMI section with a diminished polarization-dependency has a relatively large entrance width, which is beneficial to the separation of adjacent access waveguides for minimizing the coupling between them. One can tune the power splitting ratio of a 2 times 2 Si-nanowire MMI coupler by adjusting the entrance and the waist width of the tapered MMI section. 相似文献
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Jong‐Moo Lee Joon Tae Ahn Doo Hee Cho Jung Jin Ju Myung‐Hyun Lee Kyong Hon Kim 《ETRI Journal》2003,25(2):81-88
We designed a multimode interference (MMI) coupler to use in vertical coupling of double layered polymeric waveguides and analyzed the coupling characteristics by comparing our experimental and simulation results. We found that our proposed new structure, a stepped MMI coupler, is effective in vertical coupling between waveguide layers with a short length of MMI and has a high tolerance for the variation in the structure of an MMI coupler that can be induced as errors in the fabrication process. 相似文献
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A 1 X 8 GaAs/GaAlAs optical power splitter based on a MultiMode Interference (MMI) coupler is presented. The input and output single mode waveguides are optimized by the Discrete Spectral Index Method (DSIM) and a moderate square spot on the output in deepetched rib waveguides is obtained. The fabrication tolerance has been analyzed by the Finite Difference Beam Propagation Method (FDBPM). The device was fabricated by the dry etching technique and the near-field output obtained. The device shows polarization-insensitive, large fabrication tolerance, low theoretical excess loss and low power imbalance. 相似文献
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Kim D.G. Oh G.Y. Choi W.K. Kim H.J. Kim S.H. Ki H.C. Kim S.T. Ko H.J. Kim T.U. Yang M.H. Dagli N. Choi Y.W. 《Electronics letters》2008,44(20):1192-1193
Novel triangular resonators containing active and passive sections have been fabricated and characterised with various multimode-interference (MMI) lengths. The optimum MMI length and width turn out to be 108 and 9 mm, respectively. A free spectral range of approximately 228 GHz is observed near 1558 nm along with an on?off ratio of 9 dB. The proposed triangular resonator has the advantage of removing the direct coupling between the two access waveguides of the MMI coupler. 相似文献
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设计了一种可用于阵列波导光栅(AWG)解调集成微系统的绝缘体上硅(SOI)基2×2多模干涉(MMI)耦合器,用光束传播法(BPM)对MMI耦合器进行了模拟。耦合器输入/输出波导采用倒锥形,多模干涉区尺寸为6μm×57μm。在TE偏振中心波长为1.55μm时,器件附加损耗为0.46dB,不均匀性为0.06dB。在1.49~1.59μm波长范围内耦合器的附加损耗小于1.55dB。仿真结果表明所设计的2×2MMI耦合器体积小、附加损耗低、波长响应范围宽、分光均匀,符合片上集成系统的要求。 相似文献
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提出了一种基于硅基槽波导的级联多模干涉(MMI)耦合器型偏振分束器,由锥形及矩形结构MMI耦合器构成.级联结构使器件长度无需为两偏振模自镜像长度的公倍数,不仅能有效减小器件尺寸,而且提高设计灵活性.同时,利用槽波导的高双折射特性及MMI耦合器的锥形结构,可进一步缩短器件尺寸.分析结果表明,所提器件能够有效实现偏振束分离,两级MMI工作区总长度仅为42μm,准TE与准TM模的偏振消光比分别为29.8和31.4d B,1.55μm波长下的插入损耗分别为0.395和0.699 d B,偏振消光比大于20 d B时光带宽为43 nm,覆盖整个C波段.最后,详细分析了器件关键参数的制造误差对器件性能的影响. 相似文献
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为了解决存在旋转的异类图匹配问题,在互信息(MMI,Maximum of Mutual Information)匹配方法的基础上,利用穷举法在参考图中找出实时图的对应匹配位置,并作为控制点,利用模型以及最小二乘方法找出两幅图像的对应关系。利用参考图的旋转变换较好地解决了存在旋转的异类图匹配问题;把控制点理论应用于灰度匹配得到的匹配点;把景象匹配的新成果(MMI)用于解决旋转异类图匹配。仿真实验表明此方法可较好地解决存在旋转的异类图匹配问题。 相似文献
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Rajarajan M. Rahman B.M.A. Wongcharoen T. Grattan K.T.V. 《Lightwave Technology, Journal of》1996,14(9):2078-2084
The accurate analysis of multimode interference (MMI) devices with two-dimensional (2-D) confinement has been demonstrated by using the least squares boundary residual (LSBR) method. Accurate modal propagation constants and spatial field profiles in the MMI section are obtained by using the vector H-field based finite element method. The accurate calculation of the excited modal coefficients is achieved by using the LSBR, which satisfies the continuity of the transverse field components more rigorously than using simple overlap integrals 相似文献