The rapid advancement of laser-based optical communication between satellites and ground stations is being fueled by the growing need for high-bandwidth, secure, and efficient data transfer. Enormous volumes of data generated by high-resolution earth observation satellites, advanced scientific instruments, and satellite-based broadband internet connections exceed the capabilities of traditional radio frequency communication. In addition to the bandwidth requirements, security aspects are currently also of vital importance. Optical signals transmitted by a directed laser beam are much more difficult to intercept or jam. This inherent security advantage is paramount for sensitive military, intelligence, and commercial data.

Certain challenges are currently being addressed by several missions from NASA or ESA, e.g., the ESA’s ScyLight program, which includes, among other missions, the demonstration of an “Internet beyond the Clouds” system – the world first high-throughput optical network called HydRON, aimed at Terabit throughput that interconnects space assets to seamlessly integrate them with terrestrial fiber networks. Apart from atmospheric turbulences and cloud coverage, pointing and tracking are the essential challenges to be overcome for a stable and rapidly established optical link from the ground station to the respective satellite.

High-power directed laser beams based on ytterbium or erbium fiber lasers are the key technology for optical communication under increasing demands for power, robustness, and reliability. Several tens of kW of average power with excellent beam quality are required to guarantee a stable link and high bandwidth.

A crucial technology for this is space-qualified high-power fiber components and beam combing systems that can be operated even under harsh environmental conditions. FiberBridge Photonics is a European provider of essential components and systems, and offers a comprehensive range of high-power fiber components and complete kW laser systems. Specializing in both spectral and coherent beam combining technologies, we are committed to providing top-quality products and dedicated support.