Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"multimode interference"”.
-
Integrated microlenses and multimode interference devices for microflow cytometers
… simulated. An alternative device, the multimode interference device (MMI), which makes use of the self-imaging phenomenon in multimode waveguides, was also studied due to its less stringent fabrication tolerances. Optical components including channel waveguides, to route light on chip, …
-
Programmable Interactions between Optical Fields and Atom-like Systems in Integrated Circuits
… specifically, we explore the use of programmable multimode interference as a means for unitary transformations onto a set of optical spatial modes, optical resonators for high-extinction coherent modulators driven by RF signals, and large-scale silicon photonics for interacting with hybrid …
-
Design and simulation for the fabrication of integrated semiconductor optical logic gates
… ridge waveguides, ridge waveguide bends, and multimode interference (MMI) devices. We use beam propagation method (BPM) to model, design and optimize dilute ridge waveguides, MMIs, and asymmetric twin waveguide (ATG) adiabatic taper couplers. We assess device robustness with respect to …
-
Efficient power coupling to waveguides in high index contrast systems
… of two such devices. The first is a compact multimode interference coupler, also called multi-mode interferometer (MMI), which can equally distribute the optical power from one input waveguide to multiple output waveguides. The prototypes were fabricated for silicon-rich SixNy waveguides with …
-
Design of a high index contrast arrayed waveguide grating
… is presented for a high index contrast AWG using multimode interference couplers as the coupling stages. The major components were simulated using finite difference time domain (FDTD) techniques to find low loss but rather high crosstalk. A second possible design is also presented, making use of a …
-
Multi-channel solutions for optical labelfree detection schemes based on the interferometric and grating coupler principle
… sensor, the so called MMI-sensor, with a multimode interference section as wave splitting device and with non-equidistant branches is presented. The novel sensor has in addition to multichannel potential also the possibility to correlate the sensor response to the corresponding sensor …
-
Integrated Inp Photonic Switches
… d.c. bias operation is made feasible. The use of multimode interference (MMI) structures as active devices have also been investigated. These devices operate by selective refractive index perturbation on very specific areas within the MMI structure, and this is again realized using zinc diffusion. …
-
Design and fabrication of single-mode tunable lasers for regrowth-free monolithically integrated photonic circuits
… Based on multi-cavity geometries enabled by multimode interference couplers and on a cleave-free approach to facilitate integration, a portfolio of tunable lasers is presented, showing tuning ranges of up to 51nm in the C and L optical windows, and side-mode suppression ratio levels of up to …