FSO Instruments

FSO Instruments is a Delft, Netherlands-based optical communications hardware company founded in 2023, operating as the first Dutch company focused specifically on laser satellite communication (lasercom) terminals and ground station optical equipment — developing free-space optical (FSO) communication systems for satellite-to-ground links and inter-satellite optical links that offer data rates orders of magnitude higher than conventional RF communications while providing inherent physical-layer security through the narrowness of laser beams.

FSO (Free-Space Optical) communication transmits data using modulated laser beams through free space (vacuum or atmosphere) rather than radio frequency electromagnetic waves. For satellite communications, FSO offers fundamental advantages: laser beams at 1064nm or 1550nm wavelength can carry data at rates of 1-100 Gbps or higher in a single beam (versus 1-10 Gbps for the highest-performing RF Ka-band links requiring large apertures and complex modulation), the narrow beam divergence (milliradians vs degrees for RF) makes interception extremely difficult without detection, and FSO does not require ITU spectrum allocation or frequency coordination — removing a major regulatory barrier for new satellite operators.

The technical challenges FSO systems must solve include atmospheric turbulence (which causes phase distortions and intensity scintillation in beams passing through Earth's atmosphere, reducible through adaptive optics), precise pointing acquisition and tracking (the narrow beam requires arc-second accuracy between transmitter and receiver despite relative motion), and cloud blockage (requiring site diversity — multiple ground stations at geographically separated locations to ensure that at least one has clear sky visibility when others are clouded over).

FSO Instruments' location in Delft — home to Delft University of Technology (TU Delft) with its strong optics, photonics, and quantum communications research groups — provides access to talent and collaborative research relationships. The company emerges in a rapidly growing lasercom market as constellations like SpaceX Starlink (which uses optical inter-satellite links in Gen-2) drive demand for ground optical terminals to match, and ESA's Hydron initiative aims to develop European optical feeder link infrastructure. Competitors include Mynaric (Germany), TESAT-Spacecom (Germany), and Xenesis (US).