Why Laser Beams Are the Hottest New Tech in Defense

Laser beams and microwave weapons, classified as directed energy weapons, are gaining traction in defense technology, with Israel's Iron Beam project poised for implementation. This initiative addresses the challenges posed by a dwindling supply of U.S. ballistic missiles, making traditional costly munitions impractical against low-cost threats like drones.

The military's interest in lasers dates back to the 1960s, exemplified by the Tactical High Energy Laser, which could destroy rockets and artillery mid-flight. However, the chemical laser's large size and logistical demands led to its discontinuation in 2006. Current military strategies emphasize the need for both advanced munitions and directed energy solutions to counter hypersonic threats effectively.

Wayne Sanders, a military intelligence expert, highlights the necessity of a comprehensive analysis of the defense industrial base. He notes that integrated air and missile defense systems, such as Israel's Arrow II, Arrow III, David's Sling, Iron Dome, and Iron Beam, are essential for enhancing operational effectiveness against evolving threats.

Directed energy weapons are designed for portability, allowing deployment on trucks or ships, and aim to increase the number of shots while lowering costs per shot. High-powered microwave weapons can reach peak powers of up to 100 megawatts, while lasers require substantial shore power to maintain a directed beam. Their cost-effectiveness hinges on a reliable energy stream, making them appealing for military applications.

The U.S. military is increasingly focused on low-cost containerized munitions and interceptors, driven by a failure of economies of force. This urgency is reflected in plans to increase PAC-3 interceptor production from 620 to 2,000 annually, a 3.3-fold increase, alongside rising costs for terminal high altitude air defense system interceptors.

Critical minerals are vital for defense technologies, with China controlling a significant portion of the supply chain. This dependency complicates the scaling of new defense technologies, as defense contractors prioritize stockpiling existing munitions over innovating new solutions. The directed energy market is expected to grow two to three times from its current $6 to $8 billion value over the next decade, with over $15 billion already invested in R&D.

The Department of Defense is shifting from research and development to procurement, with military branches beginning to implement high-energy laser solutions to address tactical challenges, such as drone swarms. The Pentagon aims to develop a one-megawatt laser by 2030, although challenges related to physics, size, weight, and power requirements persist.

A 50-kilowatt laser can effectively disable drones, while a one-megawatt laser is necessary to counter hypersonic threats. However, deployability remains a concern due to the significant power sources required. Israel's Iron Beam, operating at approximately 150 kilowatts, serves as a test case for laser technology, providing valuable insights from its deployment against drones.

Unlike traditional missiles, laser systems are influenced by atmospheric conditions, which complicates their operational effectiveness. As military planning for future warfare becomes increasingly complex and unpredictable, no single solution exists to address the challenges posed by emerging military technologies.