نتایج جستجو برای: optical array

تعداد نتایج: 392831  

2013
Jie Sun David B. Cole Ami Yaacobi Erman Timurdogan Ehsan Shah Hosseini Gerald Leake Douglas Coolbaugh Michael R. Watts

A novel method to generate optical beams using on-chip silicon nanophotonic antenna arrays with engineered phase and amplitude is demonstrated. An 8×8 nanophotonic phased array to generate and manipulate Gaussian beams is shown. ©2013 Optical Society of America OCIS codes: (130.3120) Integrated Optics Devices; (280.5110) Phased-array Radar

2005
Yongqiang Jiang Tao Ling Maggie Y. Chen Ray T. Chen

Tunable optical true-time-delay modules based on highly dispersive photonic crystal fibers were demonstrated to provide continuous radio frequency squint-free beam scanning for X-band phased array antenna systems. © 2006 Optical Society of America OCIS codes: (060.2310) Fiber Optics; (280.5110) Phased-Array Radar

2005
Jui-che Tsai

A 1xN2 wavelength-selective switch is demonstrated using a high fill-factor two-axis analog micromirror array and a monolithic 2D collimator array. A 1x2 (scalable to 1x14) WSS with SO-GHz channel spacing is experimentally demonstrated. 02004 Optical Society of America OCIS rodeo: (06C.1810) Couplers, switches, and multiplexers (OM.4510) Optical communications

Journal: :Optics express 2007
Dumitru Mihalache Dumitru Mazilu Yuri S Kivshar Falk Lederer

We study spatiotemporal solitons at the edge of a semi-infinite binary array of optical waveguides and, in particular, predict theoretically the existence of a novel type of surface soliton, the surface gap light bullets. We analyze the stability properties of these solitons in the framework of the continuous-discrete model of an array of two types of optical waveguides.

2006
Giuseppe A. Cirino Robson Luiz G. Neto Ronaldo D. Mansano Allan Bereczki Spero P. Morato

In this work a Fresnel lens array for Passive InfraRed (PIR) motion sensors was designed, fabricated and tested. The resulting spatial filtering lens array presents the capability of distinguishing the presence of humans from small pets. Such array designed to operate in the visible range of the spectrum was manufactured on a Diamond-Like Carbon (DLC) thin film, using well-known microfabricatio...

Journal: :Applied optics 1997
R Iyer Y S Liu G C Boisset D J Goodwill M H Ayliffe B Robertson W M Robertson D Kabal F Lacroix D V Plant

The design and implementation of a robust, scalable, and modular optical power supply spot-array generator for a modulator-based free-space optical backplane demonstrator is presented. Four arrays of 8 x 4 spots with 6.47-mum radii (at 1/e(2) points) pitched at 125 mum in the vertical direction and 250 mum in the horizontal were required to provide the light for the optical interconnect. Tight ...

1997
M. M. Hossain

Ecient parallel schemes for carry-propagation-free addition of modi®ed signed-digit trinary numbers are presented. The necessary minterms for implementation using an optical programmable logic array area are derived. The proposed schemes require only a truth table of 25 entries compared with an earlier scheme of 625 entries. The proposed schemes are amenable to optical implementation. Experime...

2005
Jay Stockley Steve Serati

A space platform for optical communications could benefit from nonmechanical beam steering in which no inertia is used to redirect the laser communications link. This benefit is to come in the form of compact, low-power, lightweight optical phased arrays that provide greater flexibility in their steering capability. Non-mechanical beam steering eliminates the need for massive optomechanical com...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران - دانشکده ریاضی 1390

ابتدا تعاریف و مفاهیمی را که در این رساله مورد استفاده قرار می گیرد را بیان می کنیم. سپس به معرفی فضاهایی می پردازیم که با آن ها سر و کار خواهیم داشت. و‎‎‎‎‎ در پایان به معرفی چند قضیه و اصل می پردازیم. رده ای از دستگاه های بیضوی شبه خطی تباهیده ‎egin{equation*}‎ ‎left{egin{array}{ll}‎ -‎div (h_1 (x)| abla u|^{p-2} abla u )=lambda a(x)|u|^{p-2}u‎ +‎lambda b(x)|u|^{alpha-1}|v|^{eta+1}u+f...

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