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有限元外推法在波导本征值问题中的应用 被引量:2
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作者 李永明 俞集辉 《重庆大学学报(自然科学版)》 EI CAS CSCD 1999年第4期78-81,107,共5页
基于一阶有限元法,运用有限元的外推理论,对用有限元外推法计算波导问题的本征值进行了探讨。算例表明这种方法算法简单且具有高精度性。
关键词 有限元外推法 本征值 波导场
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光纤耦合声光Ti∶LiNbO3波导器件的研究
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作者 宁继平 汪欣 +3 位作者 高志伟 王俊涛 赵勇 韩群 《压电与声光》 CSCD 北大核心 2011年第1期30-33,37,共5页
波导型声光调制器作为高功率全光纤调Q激光器中的调制器件,光纤与器件对接耦合损耗大是影响其性能的主要因素。通过分析波导端面的Ti条半宽度与光波导模场分布的关系,计算出Ti∶LiNbO3锥形光波导与光纤耦合损耗最小时对应的最佳Ti条半... 波导型声光调制器作为高功率全光纤调Q激光器中的调制器件,光纤与器件对接耦合损耗大是影响其性能的主要因素。通过分析波导端面的Ti条半宽度与光波导模场分布的关系,计算出Ti∶LiNbO3锥形光波导与光纤耦合损耗最小时对应的最佳Ti条半宽度。分析得到Ti∶LiNbO3波导端面的Ti条半宽度对耦合损耗的影响,以及光波导的不同切型对最佳Ti条半宽度的影响。 展开更多
关键词 Ti∶LiNbO3波导 波导 Ti条半宽度 耦合损耗
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光纤耦合波导器件中光波导深度的研究 被引量:1
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作者 高志伟 宁继平 +2 位作者 王俊涛 赵勇 韩群 《光通信技术》 CSCD 北大核心 2010年第4期26-29,共4页
声光波导光开关可以作为高速光通信网络中的开关器件,其中光纤-器件对接耦合损耗大是影响其性能的主要因素。从光波导模场椭圆度和不对称度对模场失配引起的耦合损耗出发,计算Ti:LiNbO3波导与光纤耦合损耗最小时对应的最佳Ti离子扩散深... 声光波导光开关可以作为高速光通信网络中的开关器件,其中光纤-器件对接耦合损耗大是影响其性能的主要因素。从光波导模场椭圆度和不对称度对模场失配引起的耦合损耗出发,计算Ti:LiNbO3波导与光纤耦合损耗最小时对应的最佳Ti离子扩散深度。分析得到不同切型的Ti:LiNbO3波导中扩散深度、光纤模场半径对耦合损耗的影响。结果表明,y切Ti:LiNbO3波导耦合损耗约为z切波导的3倍。研究结果为共面型声光波导调制器中光波导制作参数的设计提供帮助。 展开更多
关键词 TI:LINBO3 波导 波导 扩散深度 光纤耦合损耗
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1.31μmAPE光波导及其相关器件研究
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作者 谢绍义 阳树宗 陆荣鑫 《电子科技大学学报》 EI CAS CSCD 北大核心 1997年第4期420-425,共6页
利用退火质子交换技术对工作波长为1.31μm的X-切、Y-传LiNbO3单模光波导进行了实验研究与分析;测试了不同交换时间(te)与退火时间(ta)条件下的光波导近场模光强分布曲线;通过与单模光纤模场测试比较,获得了... 利用退火质子交换技术对工作波长为1.31μm的X-切、Y-传LiNbO3单模光波导进行了实验研究与分析;测试了不同交换时间(te)与退火时间(ta)条件下的光波导近场模光强分布曲线;通过与单模光纤模场测试比较,获得了与单模光纤模场匹配的退火质子交换(APE)光波导,其中光纤—波导—光纤的插入损耗最低达到3.2dB;同时利用所研制的光波导制作了相位调制器与M-Z型强度调制器,并对其低频调制特性进行了测试。 展开更多
关键词 波导 波导 退火质子交换 调制器
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Analysis of circular-to-circular groove waveguide junction 被引量:1
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作者 崔立成 杨鸿生 《Journal of Southeast University(English Edition)》 EI CAS 2003年第1期17-21,共5页
Mode matching method is used to analyze the scattering characteristics of thecircular-to-circular groove waveguide junction. Matching the electric fields and magnetic fields atthe boundary of the junction, and multipl... Mode matching method is used to analyze the scattering characteristics of thecircular-to-circular groove waveguide junction. Matching the electric fields and magnetic fields atthe boundary of the junction, and multiplying the mode functions of the circular waveguide andcircular groove waveguide on both sides of the boundary equation, the scattering matrix equation isobtained, the scattering coefficients can be obtained from the equation. Then the scatteringcharacteristics of the iris with circular window in circular groove waveguide are analyzed. At lastthe convergent problem is discussed; when choosing a suitable mode group, convergent numericalresults are obtained, and the frequency response of the iris' scattering coefficients is also given. 展开更多
关键词 circular groove waveguide circular-to-circular groove waveguide junction mode matching method
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Fabrication of Windowed Very-Small-Aperture Laser Diodes
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作者 康香宁 徐云 +2 位作者 宋国峰 叶晓军 陈良惠 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2003年第11期1145-1148,共4页
A windowed very small aperture laser (VSAL) source for use in high resolution near field optical data storage is fabricated.The windowed regions are introduced to avoid shorting the pn junction with metal coating a... A windowed very small aperture laser (VSAL) source for use in high resolution near field optical data storage is fabricated.The windowed regions are introduced to avoid shorting the pn junction with metal coating and suppress the COD effect.It facilitates producing VSAL by simplified technology and improves the laser performance.A VSAL with 400nm small aperture is demonstrated by focused ion beam (FIB) and the output power is 0 3mW at 31mA. 展开更多
关键词 very small aperture laser optical near field ridge waveguide focused ion beam
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斜向场双层波导中导波光模式转换和衍射效率
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作者 司新文 张文康 刘公强 《光电子.激光》 EI CAS CSCD 北大核心 2001年第8期806-809,共4页
本文研究了斜向场下双层磁光薄膜波导中导波光与静磁正向体波之间的相互作用。在静磁波频率为 1.9~ 3.4GHz的范围内 ,计算了不同磁场倾角下导波光的衍射效率和模式转换效率。结果表明 ,在相匹配条件下 ,通过改变磁场倾角、微带线的宽... 本文研究了斜向场下双层磁光薄膜波导中导波光与静磁正向体波之间的相互作用。在静磁波频率为 1.9~ 3.4GHz的范围内 ,计算了不同磁场倾角下导波光的衍射效率和模式转换效率。结果表明 ,在相匹配条件下 ,通过改变磁场倾角、微带线的宽度和孔径 ,可以使导波光的衍射效率得到较大的提高。斜向场下使用 YIG材料制成的双层波导与单层波导相比 。 展开更多
关键词 斜向双层波导 静磁体波 导波光 衍射效率 模式转换效率
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Analysis on Mode Field Distribution of Waveguide Grating Coupler by the Scalar FDTD 被引量:2
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作者 HUANGChong-qing LIUJing +3 位作者 LUOWen-hua ANWei-ke YUANXiu-hua HUANGDe-xiu 《Semiconductor Photonics and Technology》 CAS 2003年第3期166-169,177,共5页
The scalar two-dimensional finite difference time domain (FDTD) method is applied to simulate the mode field distribution of TE 0 of the waveguide grating coupler. Computer simulation shows that the same stable mode f... The scalar two-dimensional finite difference time domain (FDTD) method is applied to simulate the mode field distribution of TE 0 of the waveguide grating coupler. Computer simulation shows that the same stable mode field distribution pattern is obtained through the different kinds of driving sources. It is found that the optical field mode is determined by waveguide structure and optical wavelength other than the driving source.According to the mode field distribution, the optimum coupling efficiency can be predicted. Compared with another numerical methods,the CPU-time and memory elements of computer used by FDTD are much less. 展开更多
关键词 Waveguide grating couplers Light fields Coupling efficiency FDTD
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Measurement of the Waveguide Near-field Optical Spot
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作者 XIA You-xin,PEI Xian-deng,HUANG Hao,XIE Chang-sheng,WANG Hai-wei(National Storage System Lab.,Huazhong University of Sci.& Technol.,Wuhan 430074,CHN) 《Semiconductor Photonics and Technology》 CAS 2003年第2期123-127,共5页
The characteristic of near-field spots is analyzed.The size of the near field and the heat response time of the hybrid record medium to overcome super paramagnetic effect are calculated based on the heat transfer theo... The characteristic of near-field spots is analyzed.The size of the near field and the heat response time of the hybrid record medium to overcome super paramagnetic effect are calculated based on the heat transfer theory. A novel measuring method for the diameter of near-field recording spot is also presented. Since the grain of the recording media is tiny enough,near-field optical lithography can be accomplished with the aid of atomic force microscope (AFM).The diameter of near-field recording spot can be obtained by specifically designed computer.So the relationship between the near-field recording spot diameter and the probe size of near-field recording system, the near field recording distance coupling between head and disc can be got. 展开更多
关键词 evanescent energy AFM near―field recording spot near―field opticallithography
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Effective Response of Nonlinear Composite under External AC and DC Electric Field
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作者 LIU Ye LIANG Fang-Chu SHEN Hong-Liang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第4X期731-734,共4页
A perturbation method is used to study effective response of nonlinear Kerr composites, which are subject to the constitutive relation of electric displacement and electric field, Dα=εαE+xα|E|^2E. Under the ext... A perturbation method is used to study effective response of nonlinear Kerr composites, which are subject to the constitutive relation of electric displacement and electric field, Dα=εαE+xα|E|^2E. Under the external AG and DC electric field Eapp = Eα(1 + sinωt), the effective nonlinear responses and local potentials are induced by the cubic nonlinearity of Kerr materials at all harmonics. As an example in three dimensions, we have investigated this kind of nonlinear composites with spherical inclusions embedded in a host. At all harmonic frequencies, the potentials in inclusion and host regions are derived. Furthermore, the formulae of the effective linear and nonlinear responses are given in the dilute Iimit. 展开更多
关键词 nonlinear composite dielectric response AC electric field
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Integrated Optical Waveguide Sensor for Lighting Impulse Electric Field Measurement 被引量:3
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作者 Jiahong ZHANG Fushen CHEN Bao SUN Kaixin CHEN 《Photonic Sensors》 SCIE EI CAS 2014年第3期215-219,共5页
A Lithium niobate (LiNbO3) based integrated optical E-field sensor with an optical waveguide Mach-Zehnder interferometer (MZI) and a tapered antenna has been designed and fabricated for the measurement of the puls... A Lithium niobate (LiNbO3) based integrated optical E-field sensor with an optical waveguide Mach-Zehnder interferometer (MZI) and a tapered antenna has been designed and fabricated for the measurement of the pulsed electric field. The minimum detectable E-field of the sensor was 10kV/m. The sensor showed a good linear characteristic while the input E-fields varied from 10kV/m to 370kV/m. Furthermore, the maximum detectable E-field of the sensor, which could be calculated from the sensor input/output characteristic, was approximately equal to 1000kV/m. All these results suggest that such sensor can be used for the measurement of the lighting impulse electric field. 展开更多
关键词 Lithium niobate integrated optical waveguide electric field sensor Mach-Zehnder interferometer biascontrol
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Surface plasmon interference pattern on the surface of a silver-clad planar waveguide as a sub-micron lithography tool 被引量:3
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作者 ZHU QiuXiang HU CanDong +7 位作者 WANG WenJie HE Miao ZHOU Jun ZHAO LingZhi PENG ZhiXiang LI ShuTi ZHU Ning ZHANG Yong 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第2期240-244,共5页
A new sub-micron photolithography tool has been realized by utilizing the interference of surface plasmon waves(SPWs) on the near surface of a silver(Ag)-clad ultraviolet(UV) planar waveguide.A laser beam with a wavel... A new sub-micron photolithography tool has been realized by utilizing the interference of surface plasmon waves(SPWs) on the near surface of a silver(Ag)-clad ultraviolet(UV) planar waveguide.A laser beam with a wavelength of 325 nm was incident into the waveguide core,and suffered a series of total internal reflections on the interfaces between the waveguide core and the cladding layers.The incident light and the reflected light induced two beams of SPWs traveling in contrary directions,which interfered with each other and formed a standing wave as a sub-micron photolithography tool.A near-field scanning optical microscope(NSOM) was employed to measure the intensity distribution of the stationary wave field of the near surface of the Ag layer of the waveguide,anastomosed with theoretical values acquired by use of finite difference time domain(FDTD) simulations.And with this sub-micron photolithography tool a SMG with a period of 79.3 nm,in good agreement with the theoretical value of 80.1 nm,was inscribed on the surface of a self-processing hybrid SiO2/ZrO2 solgel film for the first time. 展开更多
关键词 surface plasmon waves(SPW) silver(Ag)-clad planar waveguide SOLGEL sub-micron lithography
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Slow Light in One-Dimensional Coupled-Resonator Waveguide Controlling by an Electric Field
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作者 程木田 《Communications in Theoretical Physics》 SCIE CAS CSCD 2012年第7期151-154,共4页
The photon transport properties in one-dimensional coupled-resonator waveguide embedded with a quantum dot molecule are investigated. The calculations reveal that one can control the photon transport by using a gate e... The photon transport properties in one-dimensional coupled-resonator waveguide embedded with a quantum dot molecule are investigated. The calculations reveal that one can control the photon transport by using a gate electric field. The phase shift and group velocity delay of the transmitted single photon are discussed. This research may be found applications in integrated optoelectronic devices and solid quantum devices. 展开更多
关键词 coupled-resonator waveguide quantum dot molecule transmission group velocity delay
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Superposition of Stationary Wave Fields Via Atom Microscopy
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作者 Hizbullah Anwar Ali khan +2 位作者 Naveed Khan Iftikhar Ahmad Bakht Amin Bacha 《Communications in Theoretical Physics》 SCIE CAS CSCD 2015年第3期340-346,共7页
We investigate one-dimensional position microscopy of a three-level atom moving through a stationary wave region under the condition of electromagnetically induced transparency.The precise position information of an a... We investigate one-dimensional position microscopy of a three-level atom moving through a stationary wave region under the condition of electromagnetically induced transparency.The precise position information of an atom is observed on the resonance absorption and dispersion distribution spectrum of a weak probe field.Single and multiple localization peaks are observed in specific directions of the corresponding wave numbers and phase of the standing wave fields.The strength of space-independent Rabi frequency reduces the position uncertainty in the localized peaks without disturbing the probability of the atom.In a hot atomic medium the localized probability of an atom is reduced which depends upon the temperature of that medium.Our results provide useful applications in the development of laser cooling,atom nanolithography and Bose-Einstein condensation. 展开更多
关键词 1D atom localization superposition of standing waves fields
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