Download or read book Pulsed Hydrogen Fluoride Overtone Chemical Laser Studies written by and published by . This book was released on 1993 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study of HF chemical lasers operating on overtone transitions, OTs, in a photolytically initiated, pulsed laser facility was conducted. The primary objective was to obtain comparisons of the specific energy performance of pulsed HF, chain reaction driven, chemical laser resonators when operating only on fundamental transitions, delta V = 1, and only on first overtone transitions, delta V = 2. The initial efforts were the buildup of the experimental test facility with which excellent performance as an FT HF laser was demonstrated. However, attempts to produce OT lasing using lamda- variable reflectivity mirror coatings (to promote and suppress, simultaneously, the OT and FT mechanisms) were only marginally successful, even though major facility modifications were made to reduce cavity losses, suppress FT superradiance (ASE), suppress parasitic modes and increase pulse duration. Finally, CW OT lasing was demonstrated using the OT optical components in a combustion-driven, blowdown test facility. A specific energy level, sigma = 266 w/gm/sec, was inferred from the measurements. HF Chemical lasers, HF Overtone lasers, Pulsed photolytically initiated chemical lasers.

Download or read book Pulsed Hydrogen fluoride Laser written by Ross McLeary and published by . This book was released on 1984 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes a pulsed hydrogen-fluoride laser which has been constructed at MRL. The laser delivers an energy of 7 J in a microsecond pulse from vibrational-rotational transitions in the wavelength region 2.6-3.1 micrometers. It simultaneously produces 1 mJ of energy in a 1 microsecond pulse from pure rotational transitions in the wavelength region 10-17 micrometers. Originator furnished keywords include: Chemical lasers, Hydrogen fluoride lasers, Electric discharge, Pulse discharge.

Download or read book Laser Induced Vibrational Fluorescence Studies of Vibrational Energy Transfer in Hydrogen Fluoride written by Gregory Michael Jursich and published by . This book was released on 1982 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydrogen Fluoride Overtone Chemical Laser Technology written by William A. Duncan and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Theoretical and Experimental Investigation of the Mechanisms of the Hydrogen fluoride Pulsed Chemical Laser written by Joseph J. T. Hough and published by . This book was released on 1975 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Induced Chemical Reaction written by Robert Shiu Fuh Chang and published by . This book was released on 1976 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies of CW HF Chemical Laser Overtone Performance written by John Willis Otto and published by . This book was released on 1993 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Progress in Hydrogen Fluoride Overtone Chemical Lasers written by William A. Duncan and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Theoretical Investigation of Rotational Nonequilibrium Phenomena in the Pulsed Hydrogen Fluoride Laser System written by Keith Emery and published by . This book was released on 1979 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Nozzle Characterization for Hydrogen Fluoride Overtone Chemical Lasers written by William A. Duncan and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1993 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Induced Damage in Optical Materials written by and published by . This book was released on 2005 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Lasers written by Marvin J. Weber and published by CRC Press. This book was released on 2019-04-30 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lasers continue to be an amazingly robust field of activity. Anyone seeking a photon source is now confronted with an enormous number of possible lasers and laser wavelengths to choose from, but no single, comprehensive source to help them make that choice. The Handbook of Lasers provides an authoritative compilation of lasers, their properties, and original references in a readily accessible form. Organized by lasing media-solids, liquids, and gases-each section is subdivided into distinct laser types. Each type carries a brief description, followed by tables listing the lasing element or medium, host, lasing transition and wavelength, operating properties, primary literature citations, and, for broadband lasers, reported tuning ranges. The importance and value of the Handbook of Lasers cannot be overstated. Serving as both an archive and as an indicator of emerging trends, it reflects the state of knowledge and development in the field, provides a rapid means of obtaining reference data, and offers a pathway to the literature. It contains data useful for comparison with predictions and for developing models of processes, and may reveal fundamental inconsistencies or conflicts in the data.

Download or read book Physics Briefs written by and published by . This book was released on 1993 with total page 1058 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemical Laser Studies of Vibrational Energy Distribution in HF Formed by Elimination from Chemically Activated Molecules written by Thomas Douglas Padrick and published by . This book was released on 1971 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental and Theoretical Study of Cw HF Chemical Laser Overtone Performance written by David Leon Carroll and published by . This book was released on 1992 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overtone performance of the UIUC supersonic cw HF chemical laser was characterized as a function of flow rates, cavity pressure, mode volume, mirror reflectivity and method of He injection. The overtone performance was optimized by the same set of flow rates that optimized the fundamental performance. When the absorption/scattering losses of the mirrors were taken into account, an overtone efficiency of 70-90% was achieved, which is the highest reported to date. The overtone efficiency was a strong function of media saturation. There was no significant change in overtone power and efficiency as the mode volume increased. However, there were an increase in the number of lasing lines and a shift to higher J lines. Overtone performance was as sensitive to cavity pressure as fundamental performance. There was no significant change in overtone efficiency when the method of He injection was changed. Base region absorption by ground state HF has a significant effect on fundamental and overtone performance. Even with very high degrees of saturation, approximately 10% of the total power was lost when the He purge was turned off. For a laser having an extensive data base with well characterized mirrors to firmly establish the Rigrod parameters g$sb0$ and I$sb{rm sat}$, the accuracy to which the mirror reflectivities can be deduced using measured mirror transmissivities, measured outcoupled power and Rigrod theory is approximately $pm$0.07% for high reflectivity overtone mirrors. Rigrod theory shows that a higher media saturation yields a higher overall overtone efficiency, but does not necessarily yield a higher measureable power (power in the bucket). For low absorption/scattering loss overtone mirrors and a 5% penalty in outcoupled power, the intracavity flux and hence the mirror loading can be reduced by more than a factor of two when the gain length is long enough to well saturate the media. The inclusion of HF-H$sb2$ multi-quantum VV transfer reactions in the ORNECL model significantly improved the prediction of the zero power gains for the H$sb2$ rich UI supersonic laser. The inclusion of absorption by SF$sb{rm x}$ molecules in the model significantly improved the prediction of the Fabry-Perot spectra.