Power-dependent switching between the interacting modes of nonlinear dual-core (two-waveguide) couplers has attracted a great deal of interest during the past several years (see, for example, Synder et al.1 for a review of various physically important situations). In the theoretical papers2 -4 it has been demonstrated that three-waveguide nonlinear directional couplers offer some distinct advan...

Abstract The multi-dimensional multiplexing technology is very promising for further increasing the link capacity of optical interconnects. A 96-channel silicon-based on-chip reconfigurable add-drop multiplexer (ROADM) proposed and demonstrated first time to satisfy demands in hybrid mode/polarization/wavelengthdivision-multiplexing systems. present ROADM consists a six-channel mode/polarizatio...

Large area optical detection systems are required for applications including cell imaging, spectroscopy, nuclear medicine, bio diagnostics, radiation detection and high energy physics. Each of these applications requires that a detector or detector arrays be closely coupled with light sources or optical couplers such as fibres or light couplers. In this paper, the scaling of novel Silicon Photo...

The feasibility of fabricating wireless optical components on Silicon-on-Insulator (SOI) is investigated. Using arrays of grating couplers, a so-called phased array is constructed allowing beam steering and sending light to and receiving light from free space. Using a phased array at the receiver side also allows for more complex modulation formats since light is now captured coherently before ...

The ability of photonic crystal waveguides (PCWs) to confine and slow down light makes them an ideal component enhance the performance various devices, such as optical modulators or sensors. However, integration PCWs in applications poses design challenges, most notably, engineering PCW mode dispersion creating efficient coupling devices. Here, we solve these challenges with inverse design, exp...

With the aim of achieving constant insertion loss, this paper presents the design of a 24 GHz reflectivetype phase shifter (RTPS) integrated with a switched -attenuator for phased array transmitters. Three RTPS circuits with hybrid coupler and capacitive-type reflective loads are cascaded to obtain required phase-shift. Accumulation-mode MOS (AMOS) varactors are used as reflective loads for pha...

We demonstrate a compact, fiber-pigtailed, 4-by-4 wavelength router in Silicon-on-insulator photonic wires, fabricated using CMOS processing methods. The core is an AWG with a 250GHz channel spacing and 1THz free spectral range, on a 425x155 microm(2) footprint. The insertion loss of the AWG was reduced to 3.5dB by applying a two-step processing technique. The crosstalk is -12dB. The device was...

The design of a compact and wideband circularly polarized (CP) Monopulse antenna is presented. Firstly, the small-sized element (13mm $\times13$ mm), with impedance bandwidth (BW) 80.5% (4.3-10.1 GHz) axial ratio (AR) 48.1% (6-9.8 GHz...

This paper presents the design, analysis and development of permanent magnet (PM) torque couplers. These couplers employ rare-earth magnets. Based on finite element analysis and earlier analytical works both concentric and face-type synchronous type couplers have been designed and fabricated. The experimental performance has good correlation with finite element calculations. Keywords—Finite Ele...