Four methods based on a multimode interference (MMI) structure are optimally designed to flatten the spectral response of silicon-on-insulator- (SOI-) based arrayed-waveguide grating (AWG) applied in a demodulation integration microsystem. In the design for each method, SOI is selected as the material, the beam propagation method is used, and the performances (including the 3 dB passband width,...

This paper characterizes the Utah Slant Optrode Array (USOA) as a means to deliver infrared light deep into tissue. An undoped crystalline silicon (100) substrate was used to fabricate 10 × 10 arrays of optrodes with rows of varying lengths from 0.5 mm to 1.5 mm on a 400-μm pitch. Light delivery from optical fibers and loss mechanisms through these Si optrodes were characterized, with the prima...

Scotland, United Kingdom Photonic band gap (PBG) devices have been used to improve optoelectronic device performance through modi cation of spontaneous emission, and are currently of much interest due to the control of the photonic state which incorporated defects can provide. The concept of defect localized photon states has led to the design of structures that guide light on the nanometer sca...

In a Neutrino Factory, a 4 MW proton beam with a kinetic energy between 5 and 15 GeV interacts with a free floating liquid mercury jet target in order to produce pions which after capturing are let to decay forming a muon beam, input to the front-end accelerator system of the facility. The baseline capturing layout consists of a series of normal and superconducting solenoids producing a tapered...

Here we propose a novel quartz micromachined gyroscope. The sensor has a simple cross-fork structure in the x-y plane of quartz crystal. Shear stress rather than normal stress is utilized to sense Coriolis' force generated by the input angular rate signal. Compared to traditional quartz gyroscopes, which have two separate sense electrodes on each sidewall, there is only one electrode on each si...

Optical fibers have been the basis of the modern information technology since Kao and Hockham proposed glass waveguides as a practical medium for communication in 1965. A lot of different optical fiber active/passive devices including couplers, interferometers, gratings, resonators and amplifiers have been widely employed for applications on telecommunications and sensing networks (Agrawal, 200...

In this study, flapwise bending vibration analysis of a tapered Timoshenko beam mounted on the periphery of a rotating rigid hub is performed. The governing differential equations of motion for pure bending are derived using the Hamilton’s principle and solved using the Differential Transform Method, DTM. During the derivation of the equations, effects of rotary inertia, shear deformation and h...

Introduction: As has been shown in several previous papers, biconically tapered single-mode fibres allow power transmission with a quasisinusoidal dependence on wavelength, elongation and surrounding medium refractive index. Tapered fibres have particular advantages for sensor and wavelength niters applications with a prescribed response. The biconic tapered structure is composed of a multimode...