11 research outputs found
Directional Decomposition of Electromagnetic and Acoustic Wave-Fields - Applications in integrated optics, exploration seismics and underwater acoustics
Electrical Engineering, Mathematics and Computer Scienc
DMD Measurement and Simulation on Short Length, 850-nm Laser-Optimised, 50 m Core Diameter, GIMM Optical Fibres
Short pulse, small spot size, central launch in multimode fibres: comparison between measurement and computation
Short pulse, small spot size, central launch in multimode fibres: comparison between measurement and computation
Reflection properties of multimode interference devices
We report on the reflection properties of multimode interference (MMI) devices: we distinguish between reflection back into the input waveguides and internal resonance modes due to the occurrence of simultaneous self-images. Because of self-imaging, reflection can be extremely efficient, even in the case of MMI devices with optimized transmission. This conclusion is confirmed by the observed spectral behavior of InP-based ring lasers incorporating MMI 3 dB couplers and MMI power splitters. Several techniques are proposed to minimize the influence of these reflection
Modelling of a Microwave Induced Plasma for Glass Fibre Production
This study focuses on the electromagnetic (EM) incoupling of a microwave induced plasma (MIP) for plasma chemical vapour deposition (PCVD). To understand the PCVD process in a MIP, numerical models are constructed using the PLASIMO toolkit. The model fo- cuses on the electromagnetic energy incoupling. It uses a non-LTE argon plasma chemistry. The plasma can be considered to be two-dimensional rotationally symmetric. The model is self-consistent and includes ow and a detailed description of the incoupling of the elec- tromagnetic waves. This incoupling module solves the Maxwell equations on each cell of a finite differencing grid. The harmonic solution is used for the fields
Modelling of a Microwave Induced Plasma for Glass Fibre Production
This study focuses on the electromagnetic (EM) incoupling of a microwave induced plasma (MIP) for plasma chemical vapour deposition (PCVD). To understand the PCVD process in a MIP, numerical models are constructed using the PLASIMO toolkit. The model fo- cuses on the electromagnetic energy incoupling. It uses a non-LTE argon plasma chemistry. The plasma can be considered to be two-dimensional rotationally symmetric. The model is self-consistent and includes ow and a detailed description of the incoupling of the elec- tromagnetic waves. This incoupling module solves the Maxwell equations on each cell of a finite differencing grid. The harmonic solution is used for the fields