Documents / Official release
This Defense Intelligence Reference Document (DIA-08-1011-001), dated 1 November 2010, was prepared by the Defense Intelligence Agency's Defense Warning Office under the Advanced Aerospace Weapon System Applications program. It covers nanosatellite technologies, laser Lightcraft propulsion, a weapon mission selection study and a multi-megawatt laser study. The author recommends that the Department of Defense, working with NASA, bring laser Lightcraft propulsion research back to the United States and restart the Air Force X-50LR test flight program.
From the source:Release of 2026-09-18 Incident: 11/1/10, Las Vegas, Nevada. Released with redactions. This document is a Defense Intelligence Reference Document (DIRD), a technical reference format used by the Defense Intelligence Agency (DIA) to capture baseline knowledge on a specific topic for later analytic use. DIRDs are best understood as reference and synthesis products rather than as original research. It is one of 38 DIRDs produced under the Advanced Aerospace Weapon System Applications Program (AAWSAP) between 2009 and 2011. Because AAWSAP’s scope permitted a broad range of supporting topics, not every DIRD in the series directly concerns aerospace systems or future threat assessment. The following summary reflects the DIRD’s scope and framing at the time of writing and should not be read as implying current validation of the concepts discussed. This DIRD examines laser-propelled “Lightcraft” as a possible low-cost method to launch very small satellites into low Earth orbit by using a remote high-energy laser to supply most of the propulsion energy rather than relying entirely on onboard energy sources. The report combines a survey of nanosatellite trends with a review of “Lightcraft” propulsion concepts, vehicle design, beam-control requirements, and mission studies, and argues that the most promising application is the launch of nano- or pico-satellites, especially Earth- and space-observing payloads of a few kilograms or less. It presents the concept as potentially much cheaper than conventional multistage rockets for very small payloads, while also noting significant practical constraints including strict beam-riding geometry, atmospheric losses, demanding pointing and adaptive-optics requirements, and heavy dependence on large ground-, sea-, or air-based laser infrastructure. Overall, the document presents laser “Lightcraft” as a technically plausible launch concept whose attractiveness depends on whether the supporting laser and beam-control system can be made reliable and economical at operational scale.
“Low Earth orbit”8 pages
UNCLASSIFIED/;'POR: OPPICIAE USE 014Lf 30% wall plug efficiency, and pulse repetition rates ranging from a few kHz to 1000 kHz. This exponential growth in beam output power is the result of many factors, including the parallel development of efficient, narrow-band pump diode lasers; and the development of novel fiber geometries such as double-clad fibers and photonic crystal fiber cores (a.k.a. photonic crystal fibers). At present, HPFLs for industrial use routinely achieve 50 kW to 70 kW of beam power, and such systems have already been modified for weapons applications with a goal toward achieving > 100 kW of beam output power with in 18 to 24 months after the publication of this report. As fiber beam output power continues to increase exponentially, individual fibers can be combined coherently for increasing the total beam output power well beyond what has already been achieved by BSSSLs while providing several advantages. HPFLs have several advantages over BSSSLs. They are more efficient, easier to cool due to the large surface area-to-volume ratio, more durable, smaller and lighter, more easily allow the beam to be directed to the target, and have excellent beam quality. Fiber lasers also benefit from economies of scale and are relatively inexpensive devices. HPFLs possess the following unique characteristics, which make them very highly competitive with any chemical, gas dynamic, or bulk sol id-state laser systems [31]: • Reliability. • High level of safety. • User-friendly. • Maintenance-free. • Low-cost performance, high-volume production. • Compact size and low weight. • Wide range of wavelength selection and wavelength tunability. • Excellent beam quality and stability. • Very high wall plug and optical efficiencies. • Variety of power oscillator or master oscillator-power amplifier designs (see Figure 22). • Scalability of beam output power, variety of fiber beam combining techniques: scalable to 1 to 2 MW beam power within 1 to 2 years (see Figure 23). UNCLASSIFIED'I i'FAA: 061i1Clali.k W&& 8PtLY 53
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Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 77 pages are in the text index: search them above, or from the library's search.