Harbin Institute of Technology Pioneers Terrain-Aware Laser Power Beaming Network for Lunar Exploration
The dark, icy craters of the Moon’s south pole have long been recognized as critical sites for the future of human space exploration. These permanently shadowed regions (PSRs), untouched by sunlight for billions of years, harbor invaluable water ice — a resource poised to sustain lunar bases and fuel deeper space missions. Yet, their eternal darkness and frigid temperatures below -230°C present profound challenges, particularly in delivering reliable energy to support robotic and human activity. Traditional solar power methods fall short in these shadowed depths, forcing scientists and engineers to reimagine how power can be transmitted in this forbidding environment.
Recent research led by Professor Lifang Li and Pengzhen Guo’s team at the Harbin Institute of Technology (HIT) offers a compelling solution through an innovative, terrain-aware laser power beaming network. Published in the journal Planet, their study shifts the paradigm from single-point, line-of-sight laser links to a system-level, multi-station optimization framework. This new approach simultaneously balances three essential but competing performance metrics: coverage of the target areas, connectivity between power nodes, and the overall cost of deployment and operation — a triad critical for sustainable lunar energy infrastructure.
The inherent paradox of the lunar polar landscape sets the stage for this work. Crater rims bask in near-continuous illumination, making them ideal sites for solar energy collection and laser power station placements. However, the crater floors—the regions most scientifically valuable for accessing water ice—remain in permanent shadow. This geographic dichotomy complicates power delivery; while solar-powered stations can flourish on the rims, transmitting energy reliably into the deep craters requires navigating complex terrain, beam diffraction, and environmental interference such as lunar dust.
Previous efforts in lunar power transmission often focused on isolated, point-to-point laser links or theoretical orbital relay concepts. Real-world experimental advances demonstrated highly efficient semiconductor lasers capable of operating under lunar thermal stress and photovoltaic receivers with conversion efficiencies suitable for economic viability. Yet, the key missing ingredient was a comprehensive network model incorporating realistic lunar geography and operational constraints—one that can optimize placement and coordination of multiple power transmission nodes with precision.
The HIT team addressed this gap by constructing a mathematical framework rooted in detailed topographic data from NASA’s Lunar Orbiter Laser Altimeter (LOLA). Concentrating on regions near Shackleton crater, their model incorporates multiple real-world factors affecting laser transmission: terrain-induced obstructions, illumination variability, laser beam diffraction and divergence, pointing precision errors, and attenuation from lunar dust. Crucially, the system’s architecture decouples the fixed energy supply platforms from the laser emission units, allowing the latter to be dynamically relocated on the surface for optimal transmission pathways.
This architectural flexibility underpins the system’s adaptability, enabling more continuous power footprints across otherwise fragmented shadowed areas. Laser emission units can be repositioned locally to circumvent obstructions and maximize beam efficiency to rovers and equipment traversing the PSRs. Such adaptability marks a significant advance over prior fixed-station concepts, enabling a power network capable of sustaining mobile exploration and extended operations in permanently dark lunar environments.
At the heart of their work is an optimization algorithm that simultaneously maximizes effective coverage of shadowed regions, enhances connectivity—ensuring the powered areas form a contiguous network rather than isolated patches—and keeps infrastructure costs within realistic bounds. This trade-off-focused approach sets a new standard for lunar energy system design, balancing operational reliability and exploration utility with economic feasibility.
Simulation results validate the power of terrain-aware optimization. The effective coverage area of the PSRs more than doubles compared to baseline scenarios focused solely on high-illumination sites. Specifically, power coverage jumps from roughly 10.76% to 27.55%, while connectivity of powered regions climbs dramatically from approximately 39.93% to 98.92%. These improvements not only increase the scientific return by powering more lunar terrain but also reduce risks for mobile explorers by decreasing the likelihood of unintended power loss during rover traverses.
By integrating detailed terrain knowledge and realistic operational limitations into their system design, the researchers demonstrate that coverage gaps and network fragmentation can be effectively mitigated. This holistic perspective enables lunar planners to avoid costly overbuilding while ensuring dependable energy availability—an essential capability for deep-space exploration where supply chain logistics are daunting and mission resilience is paramount.
Beyond technical achievements, this work signals a maturation of laser power beaming technologies from laboratory demonstrations to integrated mission-ready architectures. High-efficiency semiconductor lasers have been shown experimentally to maintain stable output under drastic lunar temperature swings. Photovoltaic receivers tailored for laser wavelengths have been validated under simulated lunar conditions. The HIT framework synthesizes these components into a practical system blueprint, offering mission architects concrete parameters for deploying laser stations, positioning emission units, and managing network topology.
The broader implications extend past the Moon’s shadowed craters. As humanity pushes toward permanent bases on Mars, asteroid mining outposts, and other extraterrestrial environments where surface topography and energy access are complex, adaptive laser power networks will likely become fundamental. Moreover, the methodology—optimizing coverage, connectivity, and cost under physical constraints—could inform terrestrial applications in remote or rugged terrain lacking conventional infrastructure, amplifying the impact of this research far beyond lunar exploration.
This work arrives at a critical moment when space agencies worldwide intensify efforts to establish sustainable lunar presence. Programs such as NASA’s Artemis and China’s International Lunar Research Station each require robust power solutions for PSRs. Commercial ventures also propose orbital relay constellations, fission reactors, and high-altitude laser arrays. The HIT laboratory’s systems-level framework provides a basis for apples-to-apples comparisons among these architectures, fostering informed decisions that balance technological feasibility, mission requirements, and budget realities.
The study reaffirms that laser power beaming networks are not only viable but technically mature. Advances in laser efficiency, beam precision, and photovoltaic conversion, corroborated by terrestrial tests, underpin this confidence. The missing piece—comprehensive network design accounting for lunar terrain and mission dynamics—is now addressed by HIT’s optimized, terrain-aware system. This framework offers a clear pathway toward constructing reliable, scalable energy infrastructure in the Moon’s darkest and most scientifically vital regions.
As the next decade dawns with renewed lunar activity, the question evolves from “can we deliver power to the Moon’s shadowed craters?” to “how can we do it with maximal efficiency and minimal cost?” The Harbin Institute of Technology’s landmark research elevates laser power beaming from demonstration experiments to integrated system architecture, equipping planners with the tools to realize continuous energy availability for rovers, scientific instruments, and life-support systems. This capability lays the foundation not only for sustainable lunar exploration but also for humanity’s broader ambitions in the solar system.
The innovative terrain-aware laser power beaming network envisioned in this research embodies a fundamental enabler for the permanent settlement of hostile space environments. By bridging the energy divide between sunlit lunar rims and shadowed basins, this network empowers robotic and human explorers alike. Ultimately, such breakthroughs transform permanently shadowed lunar craters from forbidding no-go zones into vibrant frontiers where the next generation of space exploration will unfold.
Subject of Research: Not applicable
Article Title: Optimal laser power beaming network for powering Lunar permanently shadowed regions: a coverage–connectivity–cost trade-off
Web References: DOI 10.15302/planet.2026.26008
Image Credits: HIGHER EDUCATION PRESS
