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  • 1
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    Solar pumped laser technology options for space power transmission (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: An overview of long-range options for in-space laser power transmission is presented. The focus is on the new technology and research status of solar-pumped lasers and their solar concentration needs. The laser options include gas photodissociation lasers, optically-pumped solid-state lasers, and blackbody-pumped transfer lasers. The paper concludes with a summary of current research thrusts.
    Keywords: LASERS AND MASERS
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Report from the Cavity-Laser Working Group (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: From the Workshop, a Cavity-Laser Working Group was formed. The goal of this Cavity-Laser Working Group was to propose molecules which might be useful as lasants for blackbody cavity lasers. The approach was to (1) define some rules for the identification of molecules, (2) consider molecules presented at the Workshop and (3) identify additional molecules through the suggestions of attendees. Some evaluation was to be attempted for each molecule considered. A set of criteria was developed, however, sophisticated rules required detailed information which was not available for every molecule. The rules are listed and briefly discussed.
    Keywords: LASERS AND MASERS
    Type: Lasant Materials for Blackbody-Pumped Lasers; p 157-168
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Progress in solar-pumped laser research (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: High-power solar-pumped lasers could eventually provide power in space for electric and propulsive needs. Recent research results are presented showing progress on both direct-pumped and blackbody-pumped solar lasers. Using a solar simulator, lasing of C3F7I at 10 watts has been achieved. Using C4F9I, lasing thresholds as low as 170 solar constants have been demonstrated, which is the lowest threshold value for a solar-pumped gas laser to date. Blackbody-pumped CO2 lasers have achieved outputs of 180 milliwatts for cavity-pumped and 1.4 watts in transfer-pumped systems.
    Keywords: LASERS AND MASERS
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Introduction to the Workshop on Lasant Materials for Blackbody Pumped Lasers (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The purpose of this workshop was to define new lasants and transfer gases for blackbody pumped lasers. The goal was to find gases with the correct energies and lifetimes for use as lasants and/or transfer gases. The more immediate goal of the participants was to suggest molecules, currently available, (or to be synthesized) which either satisfy criteria which was developed or which deserve further study because from limited information they seem to satisfy the criteria. Thus, the workshop was interested in the identification of molecules and the rational for suggesting them. There were two basic kinds of blackbody lasers to be discussed, the cavity laser and the transfer laser. The physics of optical absorption and laser emission was addressed. The physics of the transfer laser was discussed. Molecular energy transfer from one molecule to another was added to the concepts already involved in the cavity laser. The physics of the transfer gas and the transfer-lasant gas combinations was also discussed.
    Keywords: LASERS AND MASERS
    Type: Lasant Materials for Blackbody-Pumped Lasers; p 1-9
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Preliminary design and cost of a 1-megawatt solar-pumped iodide laser space-to-space transmission station (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A preliminary conceptual design of a space-based solar pumped iodide laser emitting 1 megawatt of laser power for space-to-space power transmission is described. A near parabolic solar collector focuses sunlight onto the t-C4F9I (perfluoro-t butyl iodide) lasant within a transverse flow optical cavity. Using waste heat, a thermal system was designed to supply compressor and auxiliary power. System components were designed with weight and cost estimates assigned. Although cost is very approximate, the cost comparison of individual system components leads to valuable insights for future research. In particular, it was found that laser efficiency was not a dominant cost or weight factor, the dominant factor being the laser cavity and laser transmission optics. The manufacturing cost was approx. two thirds of the total cost with transportation to orbit the remainder. The flowing nonrenewable lasant comprised 20% of the total life cycle cost of the system and thus was not a major cost factor. The station mass was 92,000 kg without lasant, requiring approx. four shuttle flights to low Earth orbit where an orbital transfer vehicle will transport it to the final altitude of 6378 km.
    Keywords: LASERS AND MASERS
    Type: NASA-TM-4002 , L-16308 , NAS 1.15:4002
    Format: application/pdf
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  • 6
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    A NASA high-power space-based laser research and applications program (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Applications of high power lasers are discussed which might fulfill the needs of NASA missions, and the technology characteristics of laser research programs are outlined. The status of the NASA programs or lasers, laser receivers, and laser propulsion is discussed, and recommendations are presented for a proposed expanded NASA program in these areas. Program elements that are critical are discussed in detail.
    Keywords: LASERS AND MASERS
    Type: NASA-SP-464 , NAS 1.21:464 , LC-83-600161
    Format: application/pdf
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  • 7
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    Comparison of electrically driven lasers for space power transmission (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: High-power lasers in space could provide power for a variety of future missions such as spacecraft electric power requirements and laser propulsion. This study investigates four electrically pumped laser systems, all scaled to 1-MW laser output, that could provide power to spacecraft. The four laser systems are krypton fluoride, copper vapor, laser diode array, and carbon dioxide. Each system was powered by a large solar photovoltaic array which, in turn, provided power for the appropriate laser power conditioning subsystem. Each system was block-diagrammed, and the power and efficiency were found for each subsystem block component. The copper vapor system had the lowest system efficiency (6 percent). The CO2 laser was found to be the most readily scalable but has the disadvantage of long laser wavelength.
    Keywords: LASERS AND MASERS
    Type: NASA-TM-4045 , L-16431 , NAS 1.15:4045
    Format: application/pdf
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  • 8
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    Space Laser Power Transmission System Studies (1982)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Power transmission by laser technique is addressed. Space to Earth and space to space configurations are considered.
    Keywords: LASERS AND MASERS
    Type: NASA-CP-2214 , L-15030 , Oct 14, 1981 - Oct 15, 1981; Hampton, VA; United States
    Format: application/pdf
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