dc.creator Birken, John A. en_US dc.creator Seed, Richard G. en_US dc.date.accessioned 2006-06-15T13:22:50Z dc.date.available 2006-06-15T13:22:50Z dc.date.issued 1970 en_US dc.identifier 1970-Y-11 en_US dc.identifier.uri http://hdl.handle.net/1811/8607 dc.description $^{1}$W. S. Benediet. Private Communication. $^{2}$H. Hartman and B. Kleman, Can, J. Phys., Vol. 44, pp. 1609--12, 1966. $^{3}$W. S. Benediet et al., J. Quantusm Electronics, Vol. QE 4, pp. 183, 1969. $^{4}$J. Boyd, Autoncties, Anahean, California, 92803, Private Communication."" en_US dc.description Author Institution: Air Force Cambridge Research Laboratories; Seed Electronics, Air Force Cambridge Research Laboratories en_US dc.description.abstract Stable isolation of $CO_{2}$ and $H_{2} O$ rotational lines were found to be an inherent property of a concentric plasma formed with a large diameter (4.37 cm.), 3 meter longitudinal discharge tube employing a small diameter (2.54 cm.) internal grating. Certain aspects of a concentric plasma cavity will be discussed. Longitudinal mode tuning was unnecessary to preserve line isolation. Operation in the $TEM_{11}$ mode produced simultaneous emission from several vibrational bands. Figure 1 illustrates such a spectrum. The $CO_{2}$ laser emissions in the 8--9 micron region which appear to be new, coincide with higher order $CO_{2}$ vibrational $bands.^{1}$ In addition to the standard 9.4 and 10.4 micron bands, laser emission was observed from 11--15 microns. Many of these lines confirm the 11--18 micron efforts of Hartman and $Kleman.^{2}$ The remainder are believed to be new. The 8--15 micron constraint was imposed by the available grating. A project has been undertaken to produce additional spectra over 3--30 microns with Q-switching and pulse excitation. With the very high resolution IR facilities of the AFCRL Radiometry Branch, efforts are underway to contribute to the construction of very accurate molecular energy levels for $CO_{2}$. Similar work has been done by Benedict et al on $H_{2}O.^{3}$ The concentric plasma laser cavity technique has been valuable in providing a highly stable wide-band infrared wavelength reference source as well as in the study of molecular properties. The technique is being adapted in other $quarters.^{4}$ en_US dc.format.extent 174351 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title HIGHLY RESOLVED 8--15 MICRON SIMULTANEOUS EMISSION OF ISOLATED LASER LINES FROM MULTIPLE MOLECULAR BANDS en_US dc.type article en_US
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