The increasing requirement for efficient and cost effective aircraft fleet management necessitates the integration of on-line health monitoring capability. Such capability must be reliable, robust and must easily respond to the physical and environmental constraints imposed by the aircraft environment. Highly multiplexed fibre optic Bragg grating sensors are assessed to meet this challenging en...

To meet the exploding demand for Internet and broad-band services, dense wavelength-division-multiplexing systems have been extended from long-haul transmission systems to metropolitan and access area networks. In such systems, compact and conventional arrayed-waveguide grating multi/demultiplexers are required to reduce the cost of the systems. The evolution of broadband services will depend o...

Microring resonators on silicon-on-insulator substrate have been demonstrated to be promising in sensing applications. We study a microring resonator biosensor based on a novel subwavelength grating (SWG) waveguide structure, which consists of periodic silicon pillars in the propagation direction with a subwavelength period. In this structure, effective sensing region includes not only the top ...

We review and discuss our recent studies of subwavelength grating (SWG) structures for engineering the refractive index of silicon microphotonic waveguides. Various applications are presented, such as fiber-chip coupling structures, waveguide crossings and athermal waveguides made with a polymer-silicon hybrid core. Keywords-Silicon photonics; subwavelength gratings; fiberchip coupler; waveguid...

For near-infrared ground and space-based astronomy, compact photonic devices can replace the large bulk optical components in spectrographs, frequency combs, beam combiners, sky subtraction filters, thus saving cost, reducing volume, weight, power requirements. Photonic integrated circuits (PICs), analogous to (IC) electronics, are particularly powerful address innovative miniaturized solutions...