Lublin University of Technology (LUT), Department of Electronics, Poland, Higher Education (HE)

Zbigniew Lach; Andrzej Smolarz
Nadbystrzycka 38A
20-618 Lublin
Phone: +48815384331; +48815
Fax: +48815384337

Description and expertise of the organisation:
Areas research: fibre optics, power electronics, optoelectronic control and measurement and apparatus, signal and information processing, and monitoring and diagnostics of industrial processes. In the area of teleinformatic systems studies are conducted to develop methods for guarantying QoS parameters with particular focus on application to IP networks. Research also includes the issue of managing multimedia transmissions, estimation of quality of audio and video services, and advanced algorithms for packet processing in network active equipment. The research in the field of the application of analysis and processing of optical signals in the diagnostics and design of fibre optic transmission systems focuses on methods to estimate the throughput limits due to polarisation dispersion in an optical fibre and on methods to monitor the dispersion and to mitigate its effects. Additional areas of interest include modelling of fibre optic Bragg gratings. In the field of signal and information processing research encompasses: application of the wavelet transformation to the analysis of measurement data, specialised methods of lossy compression, application of neural networks and fuzzy sets to the classification of measurement signals and selection of information, and also to the design of regulators. Studies are also conducted towards the application of programmable digital microcontrollers in signal processing and data acquisition and processing.

Research interests / Project ideas
We propose research on protection systems for PONs/WDM-PONs which preserve passive character of PONs while introduce to these networks uncompromised reliability. Lack of distributed active equipment and resulting no need for local electrical powering can be beneficial for network operators in terms of lower operational costs however, eliminates application of traditional protection systems. With the increasing demand for QoS from real-time applications, maybe life-sensitive like remote on-line surgery consultations, the ability to protect of transmission in PONs becomes indispensable. We develop a system based on optical switching in which the switches are remotely controlled and remotely optically powered via an optical fibre. The system can be co-located with the remote nodes of PONs and provide any from 1:1 to 1:N protection schemes and does not rise a problem of local electric power.
For a WDM-PON system in which cyclic AWG properties are exploited for wavelength routing and consequently wavelengths can be spatially reused in drop segments we develop a protection system based on dynamic wavelength assignment.
Our suggestion to the Piano+ community is to exploit the potential of AWG routing and spatial reuse of wavelengths to provide to DWDM PONs >10Gbps peak rate per subscriber, convenient balancing of traffic load, and clear capability for fiber unbundling/service mixing. Research towards a network with these characteristics would include: an athermal AWG, tunable/switched transmitter/receiver (seeded RSOA/LD array) and suitable protection, the latter being in scope our interest.

PON, DWDM-PON, protection, remote power supply, AWG routing