塑料光学元件的优势

与玻璃光学元件相比,塑料光学元件有许多优势,诸如成本低、重量轻及更大的元件设计灵活性.塑料光学元件在自动化领域以及其它领域方面的应用正不断扩大.塑料光学元件给加工者带来了许多优于玻璃光学元件的方便之处.尽管加工塑料元件所用的工具和模具较贵,然而一旦这些问题解决后,则在批量生产过程中,塑料元件的成本就很便宜.塑料元件具有重量轻,不易破碎,易于连接和调整等特性,这使其能加工出玻璃元件不能加工的微米结构.使用多腔模具一次性可制作几个塑料零件,这样既减少     

带衍射光学元件的塑料透镜

以往的成像光学系统是由具有不同分散特性的多个透镜构成,要减少色像差,就必须减少透镜个数、小型化、降低成本。本文主要介绍通过将衍射光学元件和非球面透镜一体化设计、及对衍射光学元件的形状最佳化设计,实现了在可见光范围具有消色差功能、且     

塑料光纤光栅：一种新的短程通信网的光学元件

自从1978年K.O.Hill等人首次发现了掺锗光纤的光敏性和由此产生的光纤光栅以来,人们对其特性进行了大量的理论分析和实验研究。随着紫外写入制作技术的日趋成熟,光纤光栅在光通信中的应用也越来越广泛。到了90年代,光纤光栅技术取得了迅猛的发展。由于光纤光栅具有体积小、插入损耗低、与光纤兼容性好以及独特的波长选择性等优点,该技术将对包括光纤通信、光纤传感和光学信息处理等在内的整个光纤领域产生     

Signal-flow-graph gain with respect to the general node of a graph

A new formula for the graph gain is given, which is more general than Mason's formula and enables the graph gain to be solved with respect to the general node of the graph that may also be the loop node.     

Tunable laser optics: Applications to optics and quantum optics

Optics originally developed for tunable organic dye lasers have found applications in other areas of optics, laser optics, and quantum optics. Here, the salient aspects of the physics related to the cavity linewidth equation and the effects of intracavity beam expansion and intracavity dispersion on this equation are reviewed. Additionally, the generalized multiple-prism dispersion equation is applied to direct-vision prisms, also known as Amici prisms, to calculate dispersion configurations of practical interest. Then, the higher derivatives of the multiple-prism dispersion equation applicable to laser pulse compression are considered. From this perspective, a new compact and generalized equation for higher-order phase derivatives is introduced for the first time. Furthermore, it is shown how the N-slit interferometric equation, derived from quantum principles using Dirac's notation, gives rise to generalized versions of the diffraction grating equation and the law of refraction. The nexus between the N-slit interferometric equation and the cavity linewidth equation is also illustrated. Finally, various optical and quantum optical applications that have benefited from these developments are highlighted.     

基于超构表面的非线性光学与量子光学

近年来,超构表面在经典光场调控领域受到了广泛的关注,获得了优异的成果。同时,超构表面在非线性光学和量子光学方面的应用也引起了人们越来越多的兴趣。文中分别介绍了非线性超构表面和量子超构表面的基本原理和应用,总结了近几年的相关报道,包括谐波产生和增强,谐波产生和对称性的关系,非线性相位调控和全息成像,以及基于超构表面的纠缠光子对产生,测量和调控。最后,对超构表面在这两个领域的进一步应用和前景进行了展望。     

集成光学

一、概述 70年代初，低损耗光纤的出现开拓了光通讯实用化的前景，对于可靠的通讯系统，紧凑的光学器件以及对它们的集成是非常需要的。显然，集成光学的目的就是要使光学器件系统小型化、集成化。至于集成到什么样的规模，人们的想像肯定会受到微电子学成功的鼓舞。     

Nonlinear optics

Recent advances in the field of nonlinear optical phenomena are reviewed with particular empphasis placed on such topics as parametric oscillation self-focusing and trapping of laser beams, and stimulated Raman, Rayleigh, and Brillouin scattering. The optical frequency radiation is treated classically in terms of the amplitudes and phases of the electromagnetic fields. The interactions of light waves in a mterial are then formulated in terms of Maxwell's equations and the electric dipole approximation. In this method, non-linear susceptibility tensors are introdueed which relate the induced dipole moment to a power series expansion in field strengths. The tensor nature and the frequency dependence of the nonlinearity coefficients are considered. The various experimental, observations are described and interpreted in terms of this formalism.     

Digital optics

The authors discuss digital optics, a technology for processing, transport, and storage of optical digital information. Digital optics offers both the high temporal bandwidth of fiber communications and the high connectivity and information density of optical imaging. The energy dissipation per bit of communicated information, as well as the chip area dedicated to interconnections, can be significantly lower in optics than in high-speed electronics. This motivates the introduction of parallel optical interconnections through free space in communication-intensive areas of digital information processing such as switching in telecommunications and within multiprocessors. Digital optical circuits can be constructed by cascading two-dimensional planar arrays of optical logic gates interconnected in free space. The state of the art and the trends in digital optical information processing systems for optical logic, optoelectronic interfaces, and optical free-space interconnection systems are reviewed     

Silicon optics

Arroyo Optics, a flexible wavelength management solution manufacturer, and Lightcross Inc, a manufacturer of integrated, silicon-based optical products for telecoms equipment have agreed to merge. Arroyo Optics, the resulting company, will comprise technologies and products developed with over $50m of combined R&D capital provided by private equity investors. Both companies focus on products targeting fibre optics infrastructure applications.Visit www.three-fives.com for the latest advanced semiconductor industry news     

Long-wave optics

The basis of the near-complete analytical methodology that now exists for the design of long-wave optical systems is set out. The Gaussian beam-mode treatment of free-space propagation is extended to cover the transformations produced by conic-section reflectors or lenses, and both the propagation steps and the lens transformations are incorporated into a matrix formulation readily applicable to networks of such reflectors or lenses. In the process the theorems of Fourier optics are demonstrated and the vectorial properties of the beam-fields are kept explicit. It is shown how recent formulations of partial coherence have made it possible to include partially coherent beams in the same methodology. For the design of high-performance systems, the inclusion of higher-order mode dispersion must be fully understood, the vector properties must be recoverable, and the paraxiality on which the methodology rests must be critically assessed. The authors emphasize these aspects and present a single systematic formulation embracing all the elements