ISRO Makes Breakthrough Demonstration of Free-Space Quantum Key Distribution Over 300 Metres

Recently ISRO successfully demonstrated free-space Quantum Communication over a distance of 300 metres, for the first time in the country.

Highlights

  • According to ISRO, a number of key technologies were developed indigenously to accomplish this major feat, which included the use of indigenously developed NAVIC receiver for time synchronization between the transmitter and receiver modules, and gimbal mechanism systems instead of bulky large-aperture telescopes for optical alignment.
  • The demonstration has included live video conferencing using quantum-key-encrypted signals.
  • The free-space Quantum Key Distribution (QKD) was demonstrated at Space Applications Centre (SAC), Ahmedabad, between two line-of-sight buildings within the campus.
  • The experiment was performed ....
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