History

The prototype of KORUZA system is under constant development to find the most effective and low-cost design enabling 1 Gbps connectivity of structures up to 100m apart. The current version heavily relies on 3D printing for producing the vast majority of parts possibly suitable for the construction out of plastics and is suitable for the outdoor use.

Now

GENERATION 1.0 PROTOTYPE

  1. Fully modular mechanical design.
  2. Enables modification for a variety of use cases.
  3. 3D printed parts designed in OpenSCAD environment.
  4. Interconnected with stainless steel rods.

Late 2014

Shuttleworth Foundation Fellowship awarded to Luka Mustafa, active development with a dedicated team.

GENERATION 5 PROTOTYPE

  1. Optimized design.
  2. Complete redesign in OpenSCAD.
  3. Reduced material cost.
  4. Improved stability and reliability.
  5. Sensors + measurement and BER testing system.
  6. Automatic alignment and tracking under development.
  7. SFP module improvement, 30dB link margin.

World Wide KORUZA experiment, 10 sites globally.

GENERATION 4 PROTOTYPE

  1. Simplified design.
  2. Improved focus alignment accuracy.
  3. Reduced material cost.
  4. Fully integrated visible laser.
  5. ARM based control electronics TI Launchpad Tiva C + Energia.
  6. Low-power RF management communication between units.
  7. Automatic alignment and tracking under development.
  8. 180 m range tested, 1dB loss at 25 m.

Early 2014

  • Institute IRNAS Rače established by Luka Mustafa.
  • NLnet foundation grant to IRNAS for development of KORUZA.
  • Working outdoor prototype for long term testing.

GENERATION 3 PROTOTYPE

  1. Implements visible laser pointer alignment with a 3D printable mounting system.
  2. Water-resistant.
  3. Tested at 180 m.
  4. Long term instability due to thermal expansion.
  5. Complicated assembly.
  6. Control based on Energia and MSP430F5529.
  7. Motorized alignment in X,Y and focus.

Late 2013

3D printing
  • IEEE ComSoc Student competition Second prize to Luka Mustafa for VALET.
  • Shuttleworth foundation Flash Grant to Luka Mustafa for development.

GENERATION 2

  1. SFP optical transceiver.
  2. Kinematic mount for aligning the source to the lens.
  3. Plano-convex lens in the linear two axis translational mount.
  4. Linear translation stage for adjusting focus/collimation.
  5. Indoor desk mounting system.
  6. Visible laser for alignment purpose.
  7. 3D printed kinematic mount for pointing at its pair at a distance (resolution 10 urad / 0.6 mm at 100 m).
  8. High-speed communication extension.
  9. 1 Gbps Ethernet media converter.

Early 2013

Working prototype

Published a paper: Reintroducing Free-space Optical technology to Community Wireless Networks.

Mid 2013

Scientific presentation

Crowd-funding campaign to present the paper at AMCIS2013 in Chicago.

GENERATION 1 PROTOTYPE

  1. Kinematic mount for aligning the source to the lens (3D printed).
  2. Plano-convex lens in the kinematic mount.
  3. Linear translation stage for adjusting focus/collimation.
  4. Mounting bracket (3D printed).
  5. Infrared laser source and detector.
  6. Visible laser for alignment.
  7. Rotational mount for alignment.
  8. High-speed communication extension.
  9. 1 Gbps Ethernet media converter.

Early 2012

Idea

Very Affordable Laser Ethernet Transceiver (VALET) by Luka Mustafa, Dr. Benn Thomsen, UCL, London.

VALET PROTOTYPE

  1. Tested at 100m.
  2. Unstable operation.
  3. Complicated and un-replicable.

Questions?

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