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We theoretically investigated InGaAsP/InP evanescent mode waveguide optical isolators and proposed their application to InGaAsP/InP/Si
hybrid evanescent optical isolators. InGaAsP/InP evanescent optical isolators are composed of semiconductor optical amplifier
(SOA) waveguides having InGaAsP multiple quantum well (MQW) active layer and upper InGaAsP waveguide layer with ferromagnetic
layer. Optical isolation is obtained for evanescent optical mode in the InGaAsP waveguide layer. InGaAsP/InP/Si hybrid evanescent
optical isolators are theoretically proposed based on the idea of InGaAsP/InP evanescent optical isolators. InGaAsP/InP/Si
hybrid evanescent optical isolators are composed of ferromagnetic metal loaded silicon evanescent waveguides with wafer-bonded
InGaAsP/InP optical gain material. The optical isolation and propagation loss are discussed with the structure of silicon
evanescent waveguides, and optical isolation of 8.0 dB/mm was estimated. The concept of semiconductor evanescent mode optical
isolators is feasible with InP based photonic integrated circuits and advanced silicon photonics. 相似文献
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数字光开关网络中四功能交换开关光学Omega网络 总被引:2,自引:2,他引:0
本文提出了一种用于数字光开关网络中,四功能交换开关光学Omega网络。文中详细地阐述了用液晶空间光调制方法实现光学四功能交换开关,和Omega互连网络的原理,并给出了光学系统和实验结果。 相似文献
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在有效质量近似下,利用量子力学密度矩阵理论,从理论上研究了考虑极化子效应后核壳量子点中线性、三阶非线性以及总的光吸收系数在不同条件下随入射光能量变化的关系。通过数值计算,分析了电子-LO声子和电子-IO声子相互作用对ZnS/CdSe柱型核壳结构量子点光吸收系数的影响。结果表明,极化子效应对光吸收系数有很大影响,不同声子模式对光吸收系数影响大小不同。考虑电子-LO声子后,光吸收系数被大大提高。另外,入射光强和弛豫时间对系统的吸收系数也有很大影响。 相似文献
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光学材料光学均匀性检测方法分析 总被引:2,自引:0,他引:2
光学均匀性是光学材料的重要指标,直接影响到透射光学系统的波面质量,改变系统的波相差。惯性约束聚变(Inertial Confine Fusion,ICF)激光驱动器的研制要求对材料的光学均匀性进行高精度的检测,同时兼顾洁净度要求。实验中利用斐索干涉仪实现了大口径光学材料光学均匀性的检测,并与国外检测数据进行了对比,对检测过程中的影响因素主要包括样品的厚度测量偏差及折射系数偏差进行了分析。结果表明,样品的厚度测量偏差及折射系数偏差对结果的影响较小,可以忽略。同时用两种干涉仪专用软件对大量样品测量数据进行处理,对比了不同干涉仪光学均匀性的计算结果,表明这两种情况下对光学均匀性的处理结果相符,解决了大口径光学坯件光学均匀性的检测问题。 相似文献
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Wavelength switchings of a Fabry-Perot semiconductor laser are experimentally demonstrated by applying externally optical input pulses detuned from a cavity-resonant wavelength of the semiconductor laser with a constant injection current. The wavelength region of optical switching ranges from less than 0.1 nm to several nm over gain spectrum, being locked to the wavelength of optical inputs. These behaviors are based on multistability and multi-split branches in the optical output versus detuned optical input characteristics, caused by the carrier-induced refractive index change accompanied by optical injections. The experimental results are believed to be useful for wavelength division multiplexing and exchange in optical communication. 相似文献
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The concept of a one-dimensional optical wave and its waveguides are proposed for what is to our knowledge the first time. The proposed waveguides are principally new and named for one-dimensional optical waveguides. One-dimensional optical waveguides make it possible to guide very thin optical beams in the visible or the near-infrared region with a diameter in the nanometer range. The propagation properties are analyzed theoretically. The applications of the waveguides to optical devices in the nanometer range are discussed. 相似文献
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光纤通信光开关的物理基础 总被引:2,自引:0,他引:2
光开关是光交换系统的基本元件,也是一种基本的控光器件,本文综述了目前光纤通信中所研究和开发的光通信开关器件的物理原理,并给出各类光开关的阈值条件和典型参量。 相似文献
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在有效质量近似下,利用量子力学的密度矩阵理论,采用无限深势阱模型,从理论上研究了ZnS/CdSe柱型核壳结构量子点中线性和三阶非线性光吸收系数。导出了柱型量子点中线性和三阶非线性光学吸收系数的解析表达式,分析了该系统在不同条件下线性和三阶非线性光吸收系数与入射光频率之间的关系。改变系统的参数,该系统的光吸收系数呈规律性变化。计算结果表明:弛豫时间τ、入射光强I和壳半径R2对系统的吸收系数α有很大的影响,从而为实验上研究核壳结构量子点的非线性光学效应提供了必要的理论依据。 相似文献
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Multiple-wavelength optical fields on a detecting plane of an interferometer are generated from the interference signals detected for an object surface. The generated optical fields are backpropagated along the optical axis. An optical field along the optical axis is reconstructed by summing the backpropagated fields over the multiple wavelengths. The intensity and phase distributions of the reconstructed optical field provide the position of the object surface with an accuracy of a few nanometers. 相似文献
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基于斯特林制冷式4×288元光伏型碲镉汞二维探测器, 根据红外扫描成像系统原理, 设计了一个扫描型长波红外连续变焦光学系统。根据系统指标要求对光学指标进行分解计算及光学优化设计得到系统的光学参数和外形结构图, 并对扫描光学系统的冷反射进行分析优化。该光学系统采用三次成像的结构, 由变焦望远镜组、扫描摆镜、中继镜组、成像镜组4部分组成, 包含9片透镜和2片反射镜。为了降低校正色差成本, 系统使用了硫系玻璃镜片。光学仿真结果表明:系统在耐奎斯特频率处的全视场光学传递函数大于0.35, 全视场畸变小于2%。最后, 对系统进行了成像实验验证, 结果表明:该系统可以实现30.8~154 mm范围内连续变焦, 变焦过程中目标景物清晰, 细节分辨率高, 无冷反射现象出现, 该系统具有分辨率高、热灵敏度高、像质清晰等特点。 相似文献
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文章论述了激光与光电子技术在人类保健、医疗以及生命科学应用中的作用和意义.综述了光活检技术、光美容医疗和生物光子技术等光电子技术在保健、医疗和生物学领域中的具体应用.重点介绍了:(1)用于组织病理诊断的光活检技术,其中包括光活检的发展历史、技术优点、研究现状,以及荧光光谱和成像技术等实用光活检技术的临床应用;(2)非消融性光疗的基本作用机制和研究进展;(3)扫描共焦显微术、多光子荧光显微术、近场光学扫描显微术和光镊等显微生物成像技术的工作原理和应用.最后,展望了激光与光电子技术在生命科学中的应用前景. 相似文献
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基于非线性光学理论的激光防护材料近况 总被引:5,自引:1,他引:4
按照防护原理,可将激光防护材料分为基于线性光学理论的防护材料和基于非线性光学理论的防护材料。综述了基于非线性光学理论的多种激光防护方法及其防护原理,介绍了基于非线性光学理论的多种新型防护材料及其研究进展,比较了四种基于非线性光学理论的激光防护方法的优、缺点,简短地分析了激光防护材料今后发展的基本方向。 相似文献
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Saturable optical resonators with distributed Bragg reflectors are analyzed by using the mode coupling theory. Hysteresis and nonlinear characteristics are given as a function of the absorption coefficient, the length of the absorber region, and the coupling coefficient of the corrugated waveguide. The calculated results show that the saturable optical resonator is useful as an optical gate, optical amplifier, and optical memory in integrated optical circuits. 相似文献