oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Optical Properties of the Coupling Interface for Planar Optical Waveguides  [PDF]
Yu Zheng, Ji-An Duan
Optics and Photonics Journal (OPJ) , 2011, DOI: 10.4236/opj.2011.13018
Abstract: Planar optical waveguides are the key elements in a modern, high-speed optical network. An important problem facing the optical fiber communication system, specifically planar optical waveguides, is coupling. The current study presents a coupling model for planar optical waveguides and optical fibers. The various effects of the optical properties of the coupling interface were analyzed by the scalar finite difference beam propagation method, including the thickness, with or without the matching refractive index of the interface adhesive. The findings can serve as a guide for planar optical waveguide packaging.
Analyzing the Multilayer Optical Planar Waveguides with Double-Negative Metamaterial
Chih-Wen Kuo;Shih-Yuan Chen;Yaw-Dong Wu;Mao-Hsiung Chen
PIER , 2010, DOI: 10.2528/PIER10101405
Abstract: In this study, a general method for analyzing the multilayer optical planar waveguides with photonic metamaterial is presented. The propagation characteristics of TE waves guided by the film with both the permittivity and permeability less than zero are investigated theoretically. The formulae for the electric fields of TE modes in this structure have been proposed. Typical numerical results for dispersion characteristics are shown. The analytical and numerical results show excellent agreement.
Bragg’s grating coupler in planar optical sol-gel waveguides
Tadeusz Pustelny,Iwona Zielonka,Pawel Karasinski,Jan Jurusik
Optica Applicata , 2004,
Abstract: The aim of our investigation was to develop a technique of producing Bragg’s grating couplers on planar waveguides obtained by means of the sol-gel technique. Introducting a light beam into the waveguide structure is in the case of planar optical systems always an essential technological problem, requiring simple and reproducible solutions without extending the waveguide structure too much. The paper deals with the technology of producing grating couplers by impressing the pattern of the network while forming the planar waveguide structure applying the sol-gel method. The results of investigation on grating couplers obtained in such a way have also been presented. Attention has been drawn to the possibility of using such structures in optoelectronic sensors, particularly gas sensors, including sensors of toxic gases.
A MATRIX METHOD FOR SOLVING PLANAR DIELECTRIC OPTICAL WAVEGUIDES
平面介质光波导的一种矩阵解法

Jin Enpei,
金恩培

电子与信息学报 , 1994,
Abstract: A matrix method used in multilayer stack of dielectric films is applied to planar dielectric optical waveguides. A simple and applicable method for obtaining characterristic equation is presented.
Optical Planar Waveguides in KTiOPO4 Crystals by MeV Oxygen Ion Implantation
CHEN Feng,WANG Xue-Lin,WANG Ke-Ming,WANG Lei,JIAO Yang,WANG Liang-Ling,LU Qing-Ming,MA Hong-Ji,NIE Rui,
陈峰
,王雪林,王克明,王磊,焦扬,王亮玲,路庆明,马宏骥,聂锐

中国物理快报 , 2006,
Abstract: We report on the optical planar waveguide formation in KTiOPO4 crystals by single or double oxygen ion implantation at energies of 2.4-3.0 MeV and doses of 1015 ions/cm^2. The dark-line spectroscopy properties are investigated by a prism-coupling method. With an effective refractive index method, the refractive index profiles of the waveguides are reconstructed. The program code TRIM'98 (transport of ions in matter) is used to simulate the implantation process of oxygen ions into the KTiOPO4 crystal. It is found that an inherent relationship exists between the nuclear damage and the refractive index changes induced by the ion-beam implantation.
Digital Camera Photographing in Measuring Propagation Loss Properties of Ion-exchange Planar Optical Waveguides
数码照相法测量离子交换平面光波导损耗特性

JIA Ling-hua,QIU Feng,QIAN Ying,TI Yun-qiang,ZHENG Jie,WANG Peng-fei,FARRELL G,
贾凌华
,邱枫,钱颖,提运强,郑杰,王鹏飞,FARRELL G

光子学报 , 2009,
Abstract: The digital photographs of propagation lines of ion-exchange planar glass optical waveguides were taken by a common digital camera.According to the profile of light intensity of propagation lines,the attenuation curves were fitted and the propagation losses of the waveguides were calculated.The waveguides were treated by annealing process,and propagation losses properties were studied before and after annealing,respectively.The results show that the loss of waveguide increases with the mode.The loss in 0 mo...
Chalcogenide Glass Optical Waveguides for Infrared Biosensing  [PDF]
Marie-Laure Anne,Julie Keirsse,Virginie Nazabal,Koji Hyodo,Satoru Inoue,Catherine Boussard-Pledel,Hervé Lhermite,Jo?l Charrier,Kiyoyuki Yanakata,Olivier Loreal,Jenny Le Person,Florent Colas,Chantal Compère,Bruno Bureau
Sensors , 2009, DOI: 10.3390/s90907398
Abstract: Due to the remarkable properties of chalcogenide (Chg) glasses, Chg optical waveguides should play a significant role in the development of optical biosensors. This paper describes the fabrication and properties of chalcogenide fibres and planar waveguides. Using optical fibre transparent in the mid-infrared spectral range we have developed a biosensor that can collect information on whole metabolism alterations, rapidly and in situ. Thanks to this sensor it is possible to collect infrared spectra by remote spectroscopy, by simple contact with the sample. In this way, we tried to determine spectral modifications due, on the one hand, to cerebral metabolism alterations caused by a transient focal ischemia in the rat brain and, in the other hand, starvation in the mouse liver. We also applied a microdialysis method, a well known technique for in vivo brain metabolism studies, as reference. In the field of integrated microsensors, reactive ion etching was used to pattern rib waveguides between 2 and 300 μm wide. This technique was used to fabricate Y optical junctions for optical interconnections on chalcogenide amorphous films, which can potentially increase the sensitivity and stability of an optical micro-sensor. The first tests were also carried out to functionalise the Chg planar waveguides with the aim of using them as (bio)sensors.
An investigation of the effect of intermediate layer in three-component planar photonic crystal waveguides  [PDF]
Hongjun Shen,Huiping Tian,Yuefeng Ji
Optica Applicata , 2009,
Abstract: The introduction of a third component into planar photonic crystal waveguides definitely influences the properties of linear defect modes, such as the band diagram, intrinsic loss, group velocity and group velocity dispersion. With the increase of the dielectric constant of the interlayer, the guided modes shift to lower frequencies and the radiative losses decrease in the frequency region of high group velocity of defect mode. The analysis of the sensitivity of a band diagram to the introduction of an interlayer reveals that the wider the planar photonic crystal waveguide and the thicker the slab, the more tolerant the overall structure. When one designs the real planar photonic crystal waveguides, the effect of unintentional intermediate layer on the optical properties of planar photonic crystal waveguides has to be taken into consideration. At the same time, the introduction of an intentional interlayer into macroporous planar photonic crystal waveguides can be utilized to optimize the design.
The production of optical waveguides by ion implantation: the case of rutile
Rickards, J.;Trejo-Luna, R.;Flores-Romero, E.;Golzarri, J.I.;Espinosa, G.;
Revista mexicana de física , 2011,
Abstract: with the purpose of developing optoelectronic devices, optical waveguides have been produced by ion implantation in many solids. the implantation process creates a damaged layer near the end of the ion trajectories, with a consequent reduction of density and index of refraction. this produces an optical barrier at a depth of a few microns, depending on the type of ion and its energy. the barrier and the surface constitute a planar waveguide. rutile (tio2 tetragonal structure) single crystals were implanted with 7 mev carbon ions using the instituto de fí-sica 3 mv pelletron accelerator, in the (100) and (001) directions, and poly allyl diglycol carbonate (padc) as detection material. the waveguides were observed using the coupled prism technique, which indicated differences in the waveguides produced for different directions due to crystal anisotropy.
Optical Bloch oscillation and Zener tunneling in an array of cylindrical waveguides. Numerical simulation  [PDF]
I. Ya. Polishchuk,M. I. Gozman,Yu. I. Polishchuk
Physics , 2011,
Abstract: We investigate optical Bloch oscillation, Zener tunneling and breathing modes in arrays of optical waveguides. We perform a new method of calculation based on the multiple scattering formalism. To demonstrate Bloch oscillation and breathing modes, we consider a planar array of parallel cylindrical waveguides with the refractive index gradually varying across the array. We demonstrate that the form of Bloch oscillation may be predicted by means of dispersion law analysis. To demonstrate Zener tunneling, we consider a planar array of cylindrical waveguides of two types situated by turn. The band structure of this array contains two bands separated by a narrow gap. If the refractive indices of waveguides gradually vary across the array, the Zener tunneling leads to the Bloch-Zener oscillation.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.