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Optopyro

KONGSBERG optical pyrotechnic system – Optopyro - will remove the primary explosives from a launcher and thereby increase efficiency and reduce cost of the integration process.

KONGSBERG is developing next-generation pyro system technology called Optopyro. The system is based on optical technology where laser pulses, generated by high power semiconductor lasers are distributed via optical fibres for initiation of pyro functions.

Pyro techniques are used for separation mechanisms, valves, ignition and other functions onboard launchers and satellites. Today the most common systems are based on electro-pyro and pyro-lines (primary explosives). These systems are demanding to integrate and test. Other pyro technologies are therefore developed and investigated in order to reduce costs.

Our Optopyro System is composed of four major elements: the Laser Firing Unit (LFU), the Optical Safety Barrier (OSB), the Optical Harness (OH), and an Optical Detonator (DOP). The LFU is an electronics box containing the interface to the launcher avionics system, the laser control electronics and an electrical safety barrier. The OSB guarantee no light is going from the LFU to the rest of the system when in Safe position. The OH is the fibres with connectors, splitters etc. that transfer and distributes laser pulses to the pyro functions. The DOP is used to trigger pyro functions when receiving the laser firing pulse.

KONGSBERG's Optical Pyrotechnic System will remove the primary explosives from a launcher and thereby increase efficiency and reduce the cost of the integration process. Other benefits of the technology are reduced procurement cost, reduced mass, and reduction of lead pollution made possible by replacing traditional electrical cables and lead encapsulated pyro lines with optical fibres.

KONGSBERG has been working on optopyro technics since 2001 in various projects and studies with ESA (European Space Agency), CNES (Centre National d’études Spatiales), NSC (Norwegian Space Center) and Astrium SAS.

Key features

  • Designed to meet future environmental requirements for Ariane 6/NGL.
  • Communication via MIL 1553
  • Comprises 3 independent safety barriers of different nature.
  • Sequential firing of up to 3 events, with +/- 1 ms accuracy of time delay.
  • Multimode fibre optics

Laser Firing Unit (LFU)

  • Driven from +28 V
  • Capacity to fire up to 36 pyro functions
  • Maximum 8 simultaneous firings

Optical Safety Barrier (OSB)

  • Based on optomechanical technology.
  • Remotely controlled via circuit independent from firing circuit.
  • Visible sign showing arm status.

Downloads

Data sheet

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