We experimentally demonstrate highly efficient coupling into a slow light slotted photonic crystal waveguide. With optical mode converters and group index tapers that provide good optical mode matching and impedance matching, a nearly flat transmission over the entire guided mode spectrum of 68.8 nm range with 2.4 dB minimum insertion loss is demonstrated. Measurements also show up to 20 dB bas...

High spatial mode matching efficiencies are experimentally demonstrated when open-loop frequency-stabilized GaAlAs semiconductor lasers are heterodyned on silicon p-i-n detectors. Repeatable values of 75 percent are obtained using two independent lasers. The mode matching efficiency increases to 90 percent when a single modulated laser is self-heterodyned using an unequal path length MachZehnde...

This paper highlights the interest of step-by-step higher order sliding mode observers for MIMO nonlinear systems with unknown inputs. A structural matching condition, stating on the possibility to design such observers and to reconstruct the unknown inputs, is derived. A finite time sliding mode observer, based on the hierarchical use of the super twisting algorithm, is developed. Then, it is ...

Dept. of Electrical Engineering, Indian Institute of Technology, New Delhi [email protected] Computer aided design of inductive iris filter in waveguide technology is described here using Mode Matching Method(MMM). Direct coupled cavity niters form compact structures. Such a bandpass filter is first designed using equivalent network theory approach. Mode matching method has been used to a...

The scattering of a fluid-structure coupled wave at a flanged junction between two flexible waveguides is investigated. The flange is assumed to be rigid on one side and soft on the other; this enables a solution to be formulated using mode-matching. It is shown that both the choice of the edge conditions imposed on the plates at the junction and the choice of incident forcing significantly aff...

OBJECTIVE To evaluate the integration and accuracy of A (amplitude)-mode ultrasound-based surface matching for noninvasive registration of the head into a frameless computer-aided surgery system for otorhinology and skull base surgery. DESIGN Experimental study and case series. SETTING Academic medical center. PATIENTS Twelve patients underwent anterior and paranasal skull base surgery wi...