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WG4
Advanced Photonic Components

 

Chair: Eszter G UDVARY

Vice-Chair: Marta RUIZ LLATA

 

The successful implementation of OWC systems and indeed the research activities highlighted in the previous WGs are premised on the availability of suitable and appropriate optoelectronic/optical front-end devices and components. There is therefore a compelling need for a scientific approach to determine what components/devices are most appropriate, select the most suitable operating conditions and parameters of the device, and design new components/sub-systems that will satisfy the inherent needs of OWC systems. These scientific research activities form the central theme of this WG4. The goals within the WG4 have been therefore defined as follows:

•   Investigation of OWC wavelength selection for terrestrial and indoor applications, with emphasis on factors such as absorption, scattering, eye and skin safety, divergence loss, cost, availability of source and photodetector combinations among other trade-offs. Wavelength conversion technologies will also be examined as a means of improving receiver sensitivity.
•   Contribution to a comprehensive modelling effort to understand how device trade-offs contribute to system performance. This will provide a foundation for specific component development efforts.
•  Investigation and subsequent design of large area photodetectors with a low capacitance (2-10 picofarads) needed to unlock the huge bandwidth potential of OWC systems. Such low capacitance detectors are especially required for larger wavelengths in the micrometre range. The optical power collected at the receiver is proportional to the photodetector surface area, and large area photodetectors are known to have a low bandwidth due to their high capacitance. Thus preamplifier designs that are tolerant to this capacitance as well as receivers with optimised concentrating optics are essential, and these are not commercially available. For very high speed OWC links in the range of Gb/s, multi-array transmitters and receivers are one option to provide full coverage area, mobility, reduced ambient noise, high bandwidth and performance. 
•  Design and development of highly sensitive optical receiver with optical amplifiers - fibre or semiconductor - in intensity modulation/direct detection systems. This will also include the design and production of novel optical antennas, photonic devices and subsystems, especially for receiver-amplifier modules.
•  Design and implementation of liquid crystal-based beam steering techniques which could lead to improved angular diversity and tracking in OWC link.
•  Integration of the optoelectronic and electronics at substrate levels, thus offering low inductance and capacitance, good thermal management and simplification of packaging.
•  Integration of analogue and digital technologies to improve speed and reduce the noise and development of high-speed FPGA and ASIC technology together with the deep memory for implementation of sophisticated and high-performance coding algorithms.
•  Investigation of a combination of tracking transmitters and tracking receivers with the potential to maximise the power available at the receiver.
• Design and development of various OWC subsystem/system test-beds at visible, infrared and ultraviolet wavelengths for indoor and outdoor applications.


The research activities of WG4 will contribute to have a clear roadmap for future devices/component/sub-system development together with the expected improvements in the OWC system performance.

 


Announcements

 

1. OPTICWISE becomes an Associate Member of the 5G PPP.

 

2. OPTICWISE participates in the preparation of new IEEE standart on OWC.

 

3. IWOW 2014 Workshop Proceedings are now available at IEEExplore! All papers can be accessed through this link.

 

4. OPTICWISE Chair to Give Keynote Speech at BlackSeaCom Conference.

 

5. IWOW 2013 Workshop Proceedings are now available at IEEExplore! All papers can be accessed through this link.


6. COST IC1101 OPTICWISE Action World Record: A FSO link at 1.6 Tbit/s (see more details on SPIE Vol 52, Issue 11, Nov 2013). 

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