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  • 42.55D  (1)
  • 42.60B  (1)
  • 4255H  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    A study of the methanol laser with a 500 MHz tunable CO2 pump laser (1988)
    Springer
    Applied physics 47 (1988), S. 47-54 
    Details
    ISSN: 1432-0649
    Keywords: 3320E ; 3380B ; 4255H
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The absorption spectrum of CH3OH is measured optoacoustically over a 500 MHz tuning range in 84 different CO2 laser lines, and 19 assigned CO-stretch absorptions are used for establishing the linearity of the measurements over two decades of absorption coefficient. 40 new FIR laser lines originating from large offset absorption, are reported in the wavelength range between 40 and 400 μm, and their wavelengths are given with a relative accuracy of 5×10−5. 30 lines are assigned, involving CO-stretch transitions in torsionaln=0, 1, and 2 states, as well as transitions inn=3 of the vibrational ground state, pumped by transitions to Fermi interacting states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00696208
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Mode structure of hollow dielectric waveguide lasers (1990)
    Springer
    Applied physics 51 (1990), S. 272-284 
    Details
    ISSN: 1432-0649
    Keywords: 42.55D ; 42.60B ; 42.60 ; D ; 42.80L
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The mode structure of hollow dielectric waveguide lasers with free space sections and flat mirrors is studied theoretically and experimentally. The study covers the fundamental mode and the three most important higher order modes, and graphs are given which identify regions of high mode discrimination in the parameter space. Calculated coupling losses are verified experimentally by detailed studies of the output power of CO2 lasers as a function of resonator geometry. The intensity profile inside and outside the resonator is calculated, and the profile outside the resonator is compared with experiments for the fundamental mode as well as for the higher order modes. It is shown that in general the fundamental mode is non-Gaussian, and that drastically different output characteristics are obtained for different choice of output plane. The paper identifies design criteria for obtaining single line and single mode oscillation over a wide tuning range, even in the densest region of the CO2 laser line spectrum, and this is exemplified by a spectroscopic application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325048
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    Paper (German National Licenses)
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