A Chinese satellite reportedly beat Starlink speeds with a low-power laser

Chinese researchers have demonstrated high-speed optical communications using surprisingly low laser power from orbit. The reported experiment sent data from a satellite to a ground receiver through turbulent atmosphere and was compared with Starlink’s communications performance.

It did not involve a Chinese beam hitting a Starlink spacecraft. That interpretation turns a data-rate comparison into a physical encounter that the underlying reports do not describe.

The two-watt experiment pointed toward Earth

A South China Morning Post report described a Chinese team using a two-watt laser from a satellite in geostationary orbit, about 36,000 kilometers above Earth, to transmit data at one gigabit per second. The receiving system used a large telescope and atmospheric correction to recover a stable signal.

The phrase “five times Starlink speed” compared a reported downlink data rate with a consumer broadband benchmark. It did not identify Starlink as the target. Optical communication systems routinely send narrowly directed beams between a spacecraft and a cooperating receiver. That is fundamentally different from illuminating an unrelated satellite.

Atmospheric turbulence is the central engineering obstacle

Laser links can carry large amounts of data in a tight beam, but air bends and distorts light. Temperature differences create rapidly changing pockets with different refractive properties, making the received spot dance and blur. Clouds can block it completely. A successful link must track precisely and correct distortion while collecting enough photons to separate the message from noise.

The Chinese experiment combined adaptive optics with a technique designed to capture usable signal energy across several paths. Low transmitted power is notable because distance spreads the beam and geostationary orbit is far higher than Starlink’s low-Earth orbits. A large ground telescope, clear weather and sophisticated processing are part of the system, so laser wattage alone does not measure overall difficulty.

China has also tested lasers between its own satellites

IEEE Spectrum reported a separate optical link between two Chinese commercial satellites hundreds of kilometers apart. Intersatellite links avoid atmospheric turbulence once both endpoints are in space, but they demand exceptionally accurate pointing because the spacecraft move rapidly relative to each other and the beams are narrow.

Those tests are relevant to future broadband constellations. Satellites can relay data across orbit before sending it to a ground station, reducing dependence on a local gateway. Starlink already uses laser crosslinks for that purpose. Competing systems developing similar capabilities are building communications networks, not documenting attacks on each other’s spacecraft.

Starlink’s own lasers connect cooperating nodes

The company’s 2025 progress report describes an existing optical network and work on smaller laser terminals. Such links require both ends to know where to point and how to receive the signal. A comparison between a Chinese demonstration and Starlink therefore concerns throughput, range, terminal size and network design.

A laser powerful enough for communication can still raise safety and interference questions if misdirected, especially near sensitive optical sensors. Establishing an actual illumination event would require tracking data, a named spacecraft, time, beam characteristics and evidence from an operator or monitoring system. None appears in the sources behind the two-watt story.

Space-security language should separate capability from incident

Several countries study laser systems for communication, ranging, imaging and military purposes. The same broad technology can serve benign or hostile roles depending on power, wavelength, target and intent. That dual use makes precise verbs essential. “Transmitted,” “linked,” “illuminated,” “dazzled” and “damaged” describe very different events.

The verified accomplishment is impressive on its own: a low-power optical downlink carried a high data rate over geostationary distance by compensating for atmospheric distortion. The reported one-gigabit-per-second result was presented as roughly five times a Starlink consumer-speed benchmark, without any beam striking a Starlink spacecraft.

Orbital geometry further exposes the mismatch. A geostationary communications satellite remains over roughly the same longitude while Starlink satellites race through low Earth orbit. Directing a test beam from the former to the latter would demand coordinated tracking and a receiver designed for the wavelength and protocol. The reported ground experiment instead used a fixed terrestrial telescope capable of collecting and correcting the distorted light.

Verification of a genuine spacecraft illumination would normally leave several records. Operators could report sensor effects, tracking networks could identify the close line of sight, and researchers would name the transmitter and target. Security restrictions might limit detail, but missing evidence should not be treated as proof of a hidden incident. The available documents name a communications milestone and a commercial comparison, not a confrontation.

The distinction also affects risk assessment. A cooperative communications beam aims to deliver encoded photons to a known aperture with minimal power. A system intended to dazzle or damage an optical payload would be evaluated by intensity at the target, dwell time, wavelength and sensor susceptibility. Calling both events a “hit” removes the engineering quantities needed to understand whether an incident was harmless, disruptive or destructive.

This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.

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