in this paper, some applications of the method of least squares (mls) for the solution of various problems in electromagnetics engineering is briefly reviewed. here, mls is employed for the solution of various problems such as solution of equations, curve fitting to measured data, generalized fourier coefficients, linear operator equations, inegro-differential equations, electrostatics and magn...

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

Parity-time-symmetric (-symmetric) optical waveguide couplers offer new possibilities for fast, ultracompact, configurable, all-optical signal processing. Here, we study nonlinear properties of finite-size multimode -symmetric couplers and predict the nonlinear oscillatory dynamics that can be controlled by three parameters: input light intensity, gain and loss amplitude, and input beam profile...

We investigate the loss mechanism in three-moded multimode-interference couplers that are the building blocks of a compact and low-loss waveguide crossing structure. Broadband silicon waveguide crossing arrays with <0.01  dB insertion loss per crossing are proposed using cascaded multimode-interference couplers, where lateral subwavelength nanostructures are used to reduce the insertions loss. ...

The silicon photonics market has grown rapidly over recent decades due to the demand for high bandwidth and data-transfer capabilities. Silicon leverage well-developed semiconductor fabrication technologies combine various photonic functionalities on same chip. Complicated integrated circuits require a mass-producible packaging strategy with broadband, coupling efficiency, fiber-array fiber-to-...

We demonstrate a compact optical buffer module, comprising an InP 1×8 phased-array switch and a silica-based delay line circuit. Tunable and uniform buffering of up to 21 ns is obtained with a 3-ns temporal resolution. ©2012 Optical Society of America OCIS codes: (130.3120) Integrated optics devices; (130.4815) Optical switching devices; (060.1810) Buffers, couplers, routers, switches, and mult...

Optical phased arrays are versatile components enabling rapid and precise beam steering. An integrated approach is followed in which a 1D optical phased array is fabricated on silicon-on-insulator. The optical phased array consists of 16 parallel grating couplers spaced 2 mum apart. Steering in one direction is done thermo-optically by means of a titanium electrode on top of the structure using...

Based on the space–time duality of light, we numerically demonstrate that temporal dispersion grating couplers can generate from a single pulse an array replicas equal amplitude. The phase-only profile is optimized by genetic algorithm takes into account optoelectronic bandwidth limitations setup.

This paper depicts a wideband circularly polarized (CP) antenna for 5G devices. The array has 3D structure including four simple printed dipole elements with directional radiations, high gain, and efficiency. It achieves CP by using the sequential rotation (SR) feeding based on 90°-3dB hybrid couplers in proposed network. bandwidth is wide, 26.7%, an operating frequency band from 3.35 GHz to 4....

There is a great deal of interest and activity in the area of femtosecond micromachining of transparent materials. It promises to be a powerful technique for rapid fabrication of photonic devices in three dimensional geometries. Our group has fabricated and investigated an array of two dimensional and novel three dimensional photonic devices that are able to perform their intended functions but...