Abstract
An ir CO2, dc current pumped, optical waveguide (WG) amplifier has been built, and its active medium optical parameters measured for several CO2 emission lines, and their dependence from active medium total pressure, discharge current and temperature was investigated.
High gain is found which, coupled with relatively high saturation power in the WG fundamental mode and ease of fabrication with this technology in long (up to 1.5 m) lengths, indicates promising use to efficiently amplify high spectral and spatial purity output of a short, highly tunable WG laser up to power levels suited for nonlinear spectroscopy and optical pumping. The dependence of the small signal gain coefficient and of the saturation parameter for individual rotational lines on the radiation intensity was computed using experimentally known parameters of the discharge plasma. The computation was carried out using the two mode rate equation approach for CO2−N2−He gas mixtures. A satisfactory agreement between theoretical and experimental results was obtained.
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References
N. Ioli, G. Moruzzi, F. Strumia: Lett. Nuovo Cimento28, 257–264 (1980)
F. Strumia, N. Ioli: “High Power, Tunable Waveguide CO2 Lasers”, inPhysics of New Lasers Sources, ed. by N. Abrahms, NATO-ASI Series (Plenum, New York) (in press)
M. Inguscio, N. Ioli, A. Moretti, G. Moruzzi, F. Strumia: Opt. Commun.37, 211–216 (1981)
N. Ioli, A. Moretti, M. Pellegrino, F. Strumia: Development of WG CO2 Lasers and Their use in Molecular Spectroscopy, Proc. 4th Nat. Conf. on Quantum Electronics and Plasmas, Capri, Italy (May 1984) (in press)
R.L. Abrams: IEEE J. QE-8, 838–843 (1972)
D.R. Hall, E.K. Gorton, R.M. Jenkins: J. Appl. Phys.48, 1212–1216 (1977)
E.A.J. Marcatili, R.A. Schmeltzer: Bell. Syst. Techn. J.43, 1783–1809 (1964)
M.L. Lang, W.L. Wolfe: Appl. Opt.9, 1267–1268 (1983)
W.W. Rigrod: J. Appl. Phys.36, 2487–2490 (1965)
R.L. Abrams: Appl. Phys. Lett.25, 609–611 (1974)
P.K. Cheo: “CO2 Lasers” inLasers 3, 185 (Dekker, New York 1971)
C.P. Christensen, C. Freed, H.A. Hans: IEEE J. QE-5, 276–283 (1969)
H. Sato, Y. Miura: IEEE J. QE-19, 410–416 (1983)
L.E. Freed, C. Fred, R.G. O'Donnell: IEEE J. QE-18, 1229–1236 (1982)
N. Ioli, F. Strumia: Final Report of “Progetto Finalizzato Laser di Porenza” Italian National Council of Research (C.N.R.) (in press)
A. Stein: IEEE J. QE-18, 1321–1322 (1982)
M.W. Scott, G.D. Myers: Appl. Opt.23, 2874–2878 (1984)
R. Benedetti, T. Colombo, F. Strumia: Lett. Nuovo Cimento22, 167–172 (1978)
V.N. Varakin, V.Ya. Panchenko: Sov. J. Appl. Mech. Techn. Phys.21, 6–14 (1980)
A.S. Biryukov, B.F. Gordietz: Sov. J. Appl. Mech. Techn. Phys.6, 787–793 (1972)
B.F. Gordietz, A.I. Osipov, L.A. Shelepin:Kineticheskie processii v gasakhi molekylevarnii laserii (kinetic processes in gases and molecular lasers) (Nauka, Moskva 1980)
B.F. Gordietz, N.N. Sobolev, L.A. Shelepin: Sov. Phys. JETP26, 1039–1045 (1968)
O.P. Judd: J. Appl. Phys.45, 4572–4575 (1974)
E.S. Gasilevich, V.A. Ivanov, A.N. Lotkova, V.N. Ochkin, N.N. Sobolev, N.G. Yaroslavskiy: Sov. Phys.-Tech. Phys.39, 126–135 (1969)
S.C. Cohen: IEEE J. QE-12, 237–244 (1976)
A.M. Sinitsyn: Sov. J. Quantum Electron.8, 1230–1233 (1978)
V.V. Grigor'yants, B.A. Kuzyakov, A.M. Sinitsyn: Sov. J. Quantum Electron.9, 158–162 (1979)
G. Hirschfelder, C. Curtiss, R. Byrd:Molecular Theory of Gases and Liquids (Wiley, New York 1964)
CRC Handbook of Chem. Phys., 52nd (Chemical Rubber Company, Cleveland, Ohio 1971)
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Work supported by G.N.S.M.-C.N.R. and M.P.I.