Realization of Omnidirectional CubeSat Crosslink by Wavelength-Selective Optical Transceiver

Abstract

Advanced space missions, e.g., interplanetary exploration and Earth observation embrace constellation or swarm-like CubeSat configuration to achieve unprecedented spatial and temporal resolutions at a significantly lower investment. The realization of high-speed inter-CubeSat data communication link is mandatory to ensure the success of such missions. In this article, we present a scalable high-speed CubeSat crosslink implementation based on the wavelength-selective optical transceiver (WSOT) design. System performance based on the state-of-the-art components that satisfy the stringent size, weight, power, and cost requirements has been investigated. We estimate that with a 15 mm transceiver aperture size and 1 W peak bit power, the system attains communication distance up to 125 and 80 km for 400 Mb/s and 800 Mb/s data rates, respectively. Additionally, we present the optical and mechanical design of five transceiver units that can fit inside a 3U CubeSat to achieve a full field of regard (360°) to enable omnidirectional high-speed optical communication. Further performance improvements are possible through incorporating advanced amplifiers, error correction coding, and large aperture optics.