Mitsubishi Electric Corporation announced that it has successfully demonstrated laser optical frequency control using a new light source module, a key component of an envisioned high-capacity laser optical communication network to be deployed in outer space. 

The module, which produces a 1.5-µm wavelength signal, was installed in the OPTIMAL-1 nanosatellite developed through an industry-academia collaboration and released from the International Space Station (ISS) on January 6. The use of a nanosatellite enabled the demonstration to be carried out faster and at a lower cost than using a conventional large satellite.

Mitsubishi Electric has been developing space-based optical technologies that are expected to increase data capacity (by ten times or more) as well as communication speeds and distances compared to systems that use radio waves.

Newly developed light source module.

Satellite images are increasingly being used for purposes such as assessing conditions in post-disaster areas and the state of remote forestry resources. Existing radio-wave satellite communication systems are limited in terms of capacity, speed, and distance, so new optical systems offering improved communications capabilities are required for faster and higher-resolution assessments from space. Advanced systems that use laser signals are expected to be increasingly adopted not only for their superior communications capabilities but also for using wavelengths shorter than radio waves, which allows the use of relatively small and easily installed terrestrial antennas.

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