PhosNet group at PIC 2017

Dr. Dimitris Tsiokos will give an invited talk at PIC 2017 that will be held during 7-8 March in Brussels, Belgium. The title of the talk will be "CMOS compatible plasmo-photonics for mass-manufactured, powerful PICs".

PhoeniX BV RAMPLAS Press Release

Read the press release from RAMPLAS consortium member PhoeniX B.V. More details can be found in the project's official website

The first Greek workshop on Photonics

The first Greek workshop on Photonics will take place at National Hellenic Research Foundation (NHR), 16-17 May 2016. Here the complete announcement.

PhosNet group at ICTON 2015

Ms. Theoni Alexoudi will give an invited talk at ICTON 2015 that will be held during 5-9 July in Budapest, Hungary. The title of the talk will be "WDM-enabled Optical RAM and Optical Cache memory architectures for Chip Multiprocessors"

Dimitrios Fitsios 2014 IEEE Graduate Student Fellowship

Phosnet member Mr. Dimitrios Fitsios has been awarded the very prestigious 2014 Graduate Student Fellowship from the IEEE Photonics Society. 


Contact Info

      Dr. Amalia Miliou
Telephone Number +30 2310 998407
E-mail Address amiliou[at]

       Dr. Nikos Pleros
Telephone Number +30 2310 998776
E-mail Address npleros[at]



  • October 2014: Mr. Dimitrios Fitsios, PhD candidate in the field of Optical Communications, has been awarded the very prestigious IEEE Photonics Society Graduate Student Fellowship 2014 ( This fellowship is annually awarded to 10 outstanding graduate students world-wide pursuing graduate education within the Society field of interest. The full-list of the 2014 winners is available here and the awards will be presented at the IEEE Photonics Conference 2014 in San Diego, U.S.A.. It is the first time that a student from Aristotle University of Thessaloniki receives this prestigious award and only the third time for a student from a Greek University.

  • June 2014: Mr. Sotirios Papaioannou and Ms. Theonitsa Alexoudi, PhD candidates in the field of optical communications supervised by Assistant Prof. Nikos Pleros and Amalia Miliou, respectively, have been selected among the 44 recipients for the Excellence Scholarship awarded by the Research Committee of Aristotle University of Thessaloniki to PhD students for the year 2014.

  • June 2014: Mr. Dimitrios Fitsios, PhD candidate in the area of optical communications under the supervision of Assistant Professor Nikos Pleros, received the IKY/Siemens Doctoral Excellence Scholarship for research in the scientific field of “Nanotechnology and Applications”. Only 20 students received this scholarship among all Greek universities for this specific scientific field, while the total number of awarded students among all four scientific sectors was only 73.

Undergraduate Courses

  • Electronics, taught at 3rd semester of Dpt. of informatics (course material and lecture slides available at )

Description: Solid State Physics (Energy band theory, Conductivity, Mobility). Electric properties of metals, properties of semiconductors (electrons, holes, impurities).Principles of electric circuits.Basic electric circuits. Electronics -Diodes, rectifier circuits, specialty diodes and applications of diodes to optoelectronic devices. Transistors, basic transistor circuits, Field Effect Transistors-FETs, MOSFETs.Metal-Oxide-Semiconductor (MOS) Capacitors.Applications to digital electronic circuits.Usage of virtual bench lab.

  • Computer Architecture, taught at 3rd semester of Dpt. of informatics  (course material and lecture slides available at

Description: Overview of computer Units, their Function and Interconnection. Memory technology and Hierarchy.Cache Memory, Main, External memory (Magnetic and Optic disks), Performance.Input/Output of Data (Units, Communication, Interrupt handling). Computer Arithmetic (Integers, Signed numbers, Floating Point).The Central Processing Unit (Instruction cycle, Registers, Pipelining, Arithmetic and Logic Unit). Instruction sets (Characteristics, Function, Operands, Addressing modes, Design considerations).

  • Management of Computer Networks, taught at 6th semester of Dpt. of informatics (course material and lecture slides available at )

Description: Management of Communication Systems. The management approach for TCP/IP and OSI (NMF, SNMP, SNMPv.2, CMIP, CMISE). Functional Areas of management.Object-oriented modelling.Managemtn Information Bases (MIBs). Management via browsers.Artificial intelligence and expert systems in network management.Software for network management.

  • Enabling Technologies in Optical Communications, taught at 6th semester of Dpt. of Informatics (course material and lecture slides available at )

Description: Optical communication systems. Optical fibers, couplers and isolators, filters, optical transmitters and receivers, optical amplifiers, modulation and demodulation of optical signals.

  • Optical Communications, taught at 7th semester of Dpt. of informatics (course material and lecture slides available at )

Description: The challenge - Fiber optic networks, Applications and their requirements. Building blocks - Fibers, couplers and taps, Tunable filters, Laser diodes, Lightwave amplifiers, Modulation and demodulation of optical signals. Architecture - Organizing the system topologically, Layered architectures, Multi-access, switching and performance. Realization - third generation links, third generation multipoints, third generation networks.

  • Optical Switching, taught at 7th semester of Dpt. of Informatics (course material and lecture slides available at )

Description: Optical Networks: types, requirements and specifications. Signal degradation factors in optical transmission and switching systems: dispersion, nonlinear Kerr effects, optical amplification. Optical Test&Measurement processes: BER, Q-factor. Optical interferometric systems: Sagnac and Mach-Zehnder switches. Optical Switching paradigms, advantages and applications.Optical Switching technologies and their principle of operation. Optical Circuit Switching: architectures and basic building blocks for wavelength routing. Optical Packet Switching: Optical Packet Switched network types, header formatting, optical node architectures and technologies, optical label switching. Synchronization systems, header processing systems, signal routing and signal regeneration in optical nodes. Contention resolution for collision avoidance. MPLS - MPλS – GMPLS Networks: Routing and signaling protocols. Optical Burst Switching: network and node architectures, burst assembly algorithms, routing and signaling subsystems and protocols, deflection routing, QoS. Hybrid optical switching architectures.

  • Information Theory and Coding, taught at 8th semester of Dpt. of Informatics (course material and lecture slides available at )

Description: Information – entropy (entropy, joint entropy, conditional entropy, memory and memoryless information sources), channel capacity (information channels, mutual information and capacity, lossless channels, uniform information channel, binary symmetric channel, binary erasure channel), coding in noiseless communications (Kraft inequality, Shannon's theorem, typical codes (Shannon, Shannon-Fano, Huffmann, binary coding trees). Coding in noisy communications (decoding criteria, Fano's limit, Shannon's second theorem, Hamming code). Arithmetic coding, algebraic coding.)

Postgraduate Courses

  • Technology of Optoelectronic systems, taught at 1st semester, Graduate Program, Dpt. of informatics, course material and lecture slides available at

Description: Optical Communications Technology Roadmap, Advantages of the optical technology and optical networks, Optical Fiber, Fiber Modes Waveguiding, Attenuation, Absorption, Scattering, and Bending Losses, Dispersion, Polarization. Self Phase Modulation, Cross Phase Modulation, Four Wave Mixing, Stimulated Raman Scattering, Stimulated Brillouin Scattering. Passive Devices (Power Couplers, Isolators- Circulators, Polarization Devices, Optical Filters, Gratings and their applications). Optical Amplifiers (EDFA, RAMAN, SOA), Optical Transmitters (LASER, LED), Optical Modulators, Optical Receivers, Wavelength Conversion, Optical switching elements.

  • Advanced topics in Optical Switching, taught at 2nd (spring) semester of Dpt. of informatics Postgraduate program, course material and lecture slides available at

Description: Optically Switched Networks, WDM Optical Networks, Optical Packet/Circuit Switched Networks, Technologies and Architectures for optical links, routers and switches, basic elements of optical switching systems and signal processing systems, optical interconnects, optical data buses, silicon photonics, semiconductor optical amplifier technologies, Optical Switching Matrix Architectures and technologies.

PhD Students

Current PhD Students

  • Papaioannou Sotiris (Optical Communications)
  • Alexoudi Theonitsa (Optical Communications)
  • Fitsios Dimitris (Optical Communications)
  • Vagionas Chris (Optical Communications)
  • Maniotis Pavlos (Optical Communications)
  • Markou Stella (Optical Communications)
  • Dabos George (Optical Communications)
  • Mitsolidou Charoula (Optical Communications)
  • Chouvardas Vasilis (Tactile Displays)

Alumni PhD students

Msc/Diploma Theses

Current MSc students

  • Pitris Stelios

Alumni MSc students