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Centre for Photonic Devices and Sensors



Investigation of Optical Couplers for the Application in Optical Bus Systems for Autonomous Cars


With more and more infotainment facilities and driving assistance systems in cars, there rises the demand of a large bandwidth of data communication and a low-cost data network for the communications. Optical data bus is a good solution to meet these requirements. In terms of the waveguides that could be used in this data bus system, polymer optical waveguides are considered to be more suitable than other options such as silicon optical fibres and polymer optical fibres (POF) since they are flexible and can be printed and easily laminated with existing circuits. However, in order to achieve a complete optical system, having only polymer waveguides is not enough. Compatible optical couplers are essential to get the information into and out of the waveguides. Their performance will affect the power efficiency and the signal quality of the whole bus system.


The aim of this  project is to investigate the proper design of optical couplers for the use in polymer optical data bus systems for autonomous cars.To be more specific, a coupler that can pick up a specific mode from the multimode bus waveguide will be considered, which would be useful in a mode division multiplexing system. Secondly, investigation will be carried out on making the coupling ratio of the coupler tunable. Thirdly, input coupler that can couple a specific mode into the bus system will be worked on since there may be different requirements between the design of an output coupler and an input coupler.

Introduction of CPDS

Centre for Photonic Devices and Sensors (CPDS) is in the Photonics area of the Electrical Engineering Division, with a research focus embracing photonic and sensing devices, functional materials and their integration at system level.

We aim to address future societal needs with new system functionalities through invention of novel device architectures based on in-depth understanding of basic material properties.

There is a wide range of activities within the group, including phase-only holography and its applications, high brightness multi-stable colour reflective displays, tuneable dielectric materials and devices for radio frequencies, liquid crystal on silicon (LCOS) device development, and novel sensors.

As well as conducting highly focused studies, we also specialise in the development of demonstrators for business exploitation and commercialisation. This is facilitated by multi-disciplinary expertise within the group and by our highly experienced team approach. Some of the outcomes from the group have been successfully transferred to our industrial collaborators for production.