Acoustooptic extension of the frequency tunability of CW CO2 lasers: New FIR lasers emissions from CH3OH and13CH3OH

  • G. Carelli
  • N. Ioli
  • A. Moretti
  • G. Moruzzi
  • D. Pereira
  • F. Strumia
Article

Abstract

We have increased the frequency tunability of our CW waveguide CO2 lasers by means of an acoustooptic amplitude modulator, operating at the fixed frequency of 90 MHz. The up-shifted, or down-shifted, laser optical sideband can be generated independently by adjusting the orientation of the modulator. The efficiency is larger than 50%. The frequency tunability of the CO2 laser around each laser line is thus increased by 180 MHz. To demonstrate the possibilities of this method, a source composed of the above modulator and of a CW, 300 MHz tunable waveguide CO2 laser has been used for the search of new large offset FIR laser lines from optically pumped CH3OH and13CH3OH molecules. As a result 15 and 10 new large offset laser lines were discovered respectively. New assignments of some laser lines are also proposed. We have also measured the Stark effect, the offset, and the polarization of other already known lines. In particular a Stark effect frequency tuning of about 1 GHz is demonstrated for a laser line at 208.399 μm.

Key words

waveguide CO2 lasers new FIR laser lines CH3OH 13CH3OH 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1-.
    N. Ioli, G. Moruzzi, F. Strumia: Lett. Nuovo Cimento,28, 257 (1980)Google Scholar
  2. 2-.
    F. Strumia, N. Ioli: in “Physics of New Laser Sources”, N. Abrahms, F.T. Arecchi, A. Mooradian, A. Sona eds., Plenum-NATO ASI B132, pg.189 (1985)Google Scholar
  3. 2a-.
    N. Ioli, V. Panchenko, M. Pellegrino, F. Strumia: Appl. Phys.,B38, 23–30 (1985)Google Scholar
  4. 3-.
    M. Inguscio, N. Ioli, A. Moretti, G. Moruzzi, F. Strumia: Optics Commun.,37, 211–216 (1981)Google Scholar
  5. 4-.
    M. Inguscio, S. Marchetti, A. Moretti, F. Strumia: Int. J. IR & MM Waves,3, 97–116 (1982)Google Scholar
  6. 5-.
    J.O. Henningsen, M. Inguscio, A. Moretti, F. Strumia: IEEE J. Quant. Electron.,QE-18, 1004–1008, (1982)Google Scholar
  7. 6-.
    N. Ioli, A. Moretti, G. Moruzzi, P. Roselli, F. Strumia: J. Mol. Spectrosc.,105, 284–298 (1984)Google Scholar
  8. 7-.
    N. Ioli, A. Moretti, G. Moruzzi, F. Strumia, F. D'Amato: Int. J. IR & MM Waves,6, 1017–1029 (1985)Google Scholar
  9. 8-.
    N. Ioli, A. Moretti, F. Strumia, F. D'Amato: Int. J. IR & MM Waves,7, 459–486, (1986)Google Scholar
  10. 9-.
    G. Carelli, N. Ioli, A. Moretti, D. Pereira, F. Strumia: Appl. Phys.,B44, 111–117, (1987)Google Scholar
  11. 10-.
    G. Carelli, N. Ioli, A. Moretti, D. Pereira, F. Strumia: Appl. Phys.,B48, 299–304 (1989)Google Scholar
  12. 11-.
    G. Carelli, N. Ioli, A. Moretti, D. Pereira, F. Strumia, G. DiLonardo, L. Fusina: IEEE J. Quant. Electron.,QE-25, 1884–1888, (1989)Google Scholar
  13. 12-.
    G. Carelli, N. Ioli, A.M. Messina, A. Moretti, D. Pereira, F. Strumia, S. Zerbetto: Appl. Phys.,B52, 32–35 (1991)Google Scholar
  14. 13-.
    E.M. Telles, J.C.S. Moraes, A. Scalabrin, D. Pereira, G. Carelli, N. Ioli, A. Moretti, F. Strumia: Appl. Phys.,B52, 36–41 (1991)Google Scholar
  15. 14-.
    F. Strumia, M. Inguscio, in “Infrared and Millimeter Waves”, ed. by K.J. Button, vol. 5, Academic Press, 1982, pp. 129–213Google Scholar
  16. 15-.
    N. Ioli, A. Moretti, D. Pereira, F. Strumia: Conf. Digest XI Int. Conf. on Infr. and MM Waves, G. Moruzzi ed., 1986, ETS-Pisa pagg. 466–468Google Scholar
  17. 16-.
    Tang F., J.O. Henningsen: Conf. Digest XI Int. Conf. on Infr. and MM Waves, 1986, pagg. 105–107Google Scholar
  18. 16a-.
    Tang F., A. Olafsson, J.O. Henningsen: Appl. Phys. B,47, 47–54 (1988)Google Scholar
  19. 17-.
    Ioli N., A. Moretti, D. Pereira, F. Strumia: 12th Int. Conf. on Infrared and MM Waves, Orlando-USA, Conf. Digest, IEEE CAT No87CH2490-1 pag.61–62, 1987Google Scholar
  20. 18-.
    Moruzzi G., F. Strumia, P. Carnesecchi, B. Carli, M. Carlotti: Infrared. Phys.,29, 47–86 (1989)Google Scholar
  21. 19-.
    Moruzzi G., P. Riminucci, F. Strumia, B. Carli, M. Carlotti, R.M. Lees, I. Mukhopadhyay, J.C.W. Johns, B.P. Winnewisser, M. Winnewisser: J. Mol. Spectr.,144, 139–200 (1990)Google Scholar
  22. 21-.
    Moruzzi G, F. Strumia, P. Carnesecchi, R.M. Lees, I. Mukhopadhyay, J.C.W. Johns: Infrared. Phys.,29, 583–606 (1989)Google Scholar
  23. 21a-.
    Moruzzi G, F. Strumia, P. Carnesecchi, R.M. Lees, I. Mukhopadhyay,: Infrared. Phys.,31, in press (1991)Google Scholar
  24. 22-.
    Inguscio M., F. Strumia, J.O. Henningsen: in “Optically Pumped Far-Infrared lasers” K.J. Button, M. Inguscio, F. Strumia eds.” Plenum Press, N.Y., 1984, pagg. 105–150Google Scholar
  25. 23-.
    Mollabashi M., W, Lewis-Bevan, I. Mukhopadhyay, R.M. Lees: 12th Int. Conf. on Infrared and MM Waves, Orlando-USA, Conf. Digest, IEEE CAT No87CH2490-1 pag.316, 1987Google Scholar
  26. 24-.
    M. Inguscio, N. Ioli, A. Moretti, F. Strumia: Conf. Digest “Third Int. Conf. Infr. Phys.”, Zurich 1984 pag. 448Google Scholar
  27. 25-.
    M. Inguscio, N. Ioli, A. Moretti, F. Strumia: Conf. Digest “7 Int. Conf. Infr. MM Waves” Marseille 1983, pag. 155Google Scholar
  28. 26-.
    M. Inguscio, P. Minguzzi, A. Moretti, F. Strumia, M. Tonelli: Appl. Phys.,18, 261–270 (1979)Google Scholar
  29. 27-.
    M. Inguscio, A. Moretti, F. Strumia: Conf. Digest IV Int. Conf. Infr. Mill. Waves, 1979, p. 205–206, IEEE Cat. N. 79-CH 1384-7 MTTGoogle Scholar
  30. 27a-.
    M. Inguscio, N. Ioli, A. Moretti, G. Moruzzi, F. Strumia: Optics Commun.,37, 211–216 (1981)Google Scholar
  31. 28-.
    J.O. Henningsen: J. Mol. Spectr.,85, 282 (1981)Google Scholar
  32. 29-.
    M. Inguscio, A. Moretti, F. Strumia: Optics Commun.,30, 355–360 (1979)Google Scholar
  33. 30-.
    Ioli N., A. Moretti, F. Strumia: Int. J. IR & MM Waves,7, 459–486 (1986)Google Scholar
  34. 31-.
    I. Mukhopadhyay, R.M. Lees, W. Lewis-Bevan, J.C.W. Johns, G. Moruzzi, F. Strumia: Int. J. IR & MM Waves,8, 1483–1502 (1987)Google Scholar
  35. 32-.
    G. Carelli, N. Ioli, A. Moretti, D. Pereira, F. Strumia, R. Densing: Appl. Phys.,B45, 97–100 (1988)Google Scholar

Copyright information

© Plenum Publishing Corporation 1991

Authors and Affiliations

  • G. Carelli
    • 2
  • N. Ioli
    • 1
  • A. Moretti
    • 1
  • G. Moruzzi
    • 1
  • D. Pereira
    • 1
  • F. Strumia
    • 1
  1. 1.Dipartimento di Fisica dell'Università, PisaPisaItaly
  2. 2.Dep. Eletrôn. QuantUNICAMPCampinasBrazil

Personalised recommendations