KORUZA

What is Koruza?

Koruza is an innovative open-source open-hardware wireless communication system, employing a new low-cost approach to designing free-space optical network systems, enabling building-to-building connectivity with an eye safe highly collimated light beam at a capacity of 1 Gbps or 10 Gbps at distances up to 100 meters, enabling organic bottom-up growth of high-capacity networks.

A DIY friendly, open-source release together with a complete kit of assembly parts as well as detailed instructions on how to properly assemble and test the system is released. Check Koruza website for the details.

Documentation

Koruza is documented on GitHub, using best practices of software design to allow collaborative editing.

It is is available in a number of GitHub repositories.

• Koruza – Here you can find all the plans for mechanical and electronic Koruza parts.

• koruza-pi – This is a Koruza package for Raspberry Pi (user interface, measurements data collection, controller).

• UniversalUnipolarStepperController – Here you can find documentation for universal controller for unipolar stepper motors with encoders and end switches.

• koruza-testing – Test scripts for use in artificial fog tunnel and general testing, primary useful for scientific applications.

Assembly Instructions - Step by step assembly instructions on how to build Koruza units, including photo tutorial, best to be used with a DIY Koruza assembly kit available at Fabrikor.

Bill of Material - Defines all parts required to assemble one Koruza unit, two are required for a working link.

User Manual - Instructions on how to mount, power up the Koruza system and establish a wireless optical link.

Koruza Overview - Read this overview to get the basic understanding of the technical operation of Koruza.

Koruza Specs

A) 1 Gbps Version:

ELECTRICAL

• Management port: 100 Mbps ethernet + passive PoE

• Data port: 1 Gbps ethernet

• Power supply requirements: 24 V (12 V - 30 V) 1A

• Average power consumption: 3 W

MECHANICAL

• Outdoor enclosure (material): Painted aluminium

• Mounting: Vertical/horizontal pole up to diameter 60 mm

• Weight: Approximately 3.5 kg

• Dimensions: 400 mm x 100 mm x 100 mm

• Manual beam alignment accuracy: 1 mrad

• Motorized beam alignment: 0.003 mrad

OPTICAL

• Optical source and detector: SC SFP WDM Bi-Di module with DDM

• Wavelength: Matched pair at 1330 nm/1550 nm

• Transmitter power: 0 dBm

• Receiver sensitivity: -23 dBm

• Bandwidth: 1 Gbps

• Laser power: >1 mW

• Beam divergence: 0.05 mrad

• Aperture: 50 mm NBK7 Plano-convex lens

• Receiver field-of-view: 10 mrad

• Laser class: 1M

• Alignment laser: Green 532 nm 5 mW

• Alignment laser class: 3B

CONTROL & PROCESSING

• Management microcomputer: Raspberry Pi 2B

• Management interface: http and websocket

• Auto-tracking: under development

• Data processing: none, Layer 1 system

• Annual optical link availability: 99%

ENVIRONMENTAL

• Operating temperature: -20 deg C to 60 deg C

• Humidity: undetermined

• Outdoor rating: IP56

• Distance: < 150 m, greater with limited reliability

ATTENUATION at 100m

• Clear day (10+ km visibility): 0 dB

• Moderate fog (500 m visibility): 1 dB

• Dense fog (100 m visibility): 4 dB

• Very dense for (50 m visibility): 10 dB

B) 10 Gbps Version:

ELECTRICAL

• Management port: 100 Mbps ethernet + passive PoE

• Data port: SFP cage

• Power supply requirements: 24 V (12 V - 30 V) 1A

• Average power consumption: 3 W

MECHANICAL

• Outdoor enclosure (material): Painted aluminium

• Mounting: Vertical/horizontal pole up to diameter 60 mm

• Weight: Approximately 3.5 kg

• Dimensions: 400 mm x 100 mm x 100 mm

• Manual beam alignment accuracy: 1 mrad

• Motorized beam alignment: 0.003 mrad

OPTICAL

• Optical source and detector: SC SFP WDM Bi-Di module with DDM

• Wavelength: Matched pair at 1270 nm/1310 nm

• Transmitter power: 0.5 dBm

• Receiver sensitivity: -15 dBm

• Bandwidth: 10 Gbps

• Laser power: >1 mW

• Beam divergence: 0.05 mrad

• Aperture: 50 mm NBK7 Plano-convex lens

• Receiver field-of-view: 10 mrad

• Laser class: 1M

• Alignment laser: Green 532 nm 5 mW

• Alignment laser class: 3B

CONTROL & PROCESSING

• Management microcomputer: Raspberry Pi 2B

• Management interface: http and websocket

• Auto-tracking: under development

• Data processing: none, Layer 1 system

• Annual optical link availability: 99%

ENVIRONMENTAL

• Operating temperature: -20 deg C to 60 deg C

• Humidity: undetermined

• Outdoor rating: IP56

• Distance: < 150 m, greater with limited reliability

ATTENUATION at 100 m

• Clear day (10+ km visibility): 0 dB

• Moderate fog (500 m visibility): 1 dB

• Dense fog (100 m visibility): 4 dB

• Very dense for (50 m visibility): 10 dB

License