Assuming available laser technology, and considering the divergence of the interferometric signals, the range for satellite-to-satellite communications has been estimated to be approximately 2,000 km.[68] These estimates are applicable to an array of satellites orbiting the Earth. For space vehicles or space stations, the range of communications is estimated to increase up to 10,000 km.[68] This approach to secure space-to-space communications was selected by Laser Focus World as one of the top photonics developments of 2015.[69]