Publications (8)
LEO-to-ground optical communications using SOTA (Small Optical TrAnsponder) - Payload verification results and experiments on space quantum communications
Alberto Carrasco-Casado, Hideki Takenaka, Dimitar Kolev +8
Free-space optical communications have held the promise of revolutionizing space communications for a long time. The benefits of increasing the bitrate while reducing the volume, m…
The Japanese Vision for the Black Hole Explorer Mission
Kazunori Akiyama, Kotaro Niinuma, Kazuhiro Hada +43
The Black Hole Explorer (BHEX) is a next-generation space very long baseline interferometry (VLBI) mission concept that will extend the ground-based millimeter/submillimeter arrays…
NICT's versatile miniaturized lasercom terminals for moving platforms
Alberto Carrasco-Casado, Koichi Shiratama, Phuc V. Trinh +5
With the goal of meeting the diverse requirements of many different types of platforms, ranging from small drones to big satellites, and being applied in a variety of diverse scena…
Development and Space-Qualification of a Miniaturized CubeSat's 2-W EDFA for Space Laser Communications
Alberto Carrasco-Casado, Koichi Shiratama, Dimitar Kolev +4
The Japanese National Institute of Information and Communications Technology (NICT) is currently developing a high-performance laser-communication terminal for CubeSats aiming at p…
Development of a miniaturized laser-communication terminal for small satellites
Alberto Carrasco-Casado, Koichi Shiratama, Phuc V. Trinh +5
Free-space optical communication is becoming a mature technology that has been demonstrated in space a number of times in the last few years. The Japanese National Institute of Inf…
A Long-Term Spectral Study of the Single Active Giant OP Andromedae
Stefan Georgiev, Renada Konstantinova-Antova, Ana Borisova +10
We present a spectral study of the single magnetically active K giant OP And in the period 1979 -- 2018, monitoring the variability of the activity indicator line H. Original d…
Prototype Development and Validation of a Beam-Divergence Control System for Free-Space Laser Communications
Alberto Carrasco-Casado, Koichi Shiratama, Dimitar Kolev +9
Being able to dynamically control the transmitted-beam divergence can bring important advantages in free-space optical communications. Specifically, this technique can help to opti…
Intersatellite-link demonstration mission between CubeSOTA (LEO CubeSat) and ETS9-HICALI (GEO satellite)
Alberto Carrasco-Casado, Phong Xuan Do, Dimitar Kolev +7
LEO-to-GEO intersatellite links using laser communications bring important benefits to greatly enhance applications such as downloading big amounts of data from LEO satellites by u…