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    Kolacek, K. Schmidt, J. Prukner, V. Frolov, O. and Straus, J. 2008. Ways to discharge-based soft X-ray lasers with the wavelength λ<15 nm. Laser and Particle Beams, Vol. 26, Issue. 02,


    Milani, Marziale Causa, Federica and Ferraro, Lorenzo 2008. Growth and optical properties of large single crystals of rhodamine from methanol solution. Journal of Crystal Growth, Vol. 310, Issue. 20, p. 4468.


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Lasing properties and nonlinearities of dyes under high power pumping

  • M. Milani (a1), L. Ferraro (a1), F. Causa (a2) and D. Batani (a3)
  • DOI: http://dx.doi.org/10.1017/S0263034607000675
  • Published online: 17 December 2007
Abstract
Abstract

Nitrogen lasers have been used for many years to make dye solutions lase. A nitrogen laser, which transverse electrical discharge in gas at atmospheric pressure has been built in our laboratory. It has been characterized and applied to pump different dyes: Rhodamine 6G, Coumarin 440, DOTCI, and pyranine in simple “on axis” geometric configuration. It has been shown that pyranine can lase in the absence of any optical external mirror cavity, this happens at very low threshold, and in different solvents. Dyes under consideration can be grouped into two major classes according to their lasing behavior independently on their concentration in the solvent: Rhodamine 6G and DOTCI can lase both axially or transversally and Coumarin 440 and pyranine can lase only axially. Other intriguing features have been observed that span from simultaneous multiple beam generation, to super fluorescence and to distribute axial pumping of dye solutions. A preliminary basis for understanding and controlling such processes is the spatial energy distribution and the energy density of the beam.

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Corresponding author
Address correspondence and reprint requests to: D. Batani, 1Department of Physics, Milano-Bicocca University, Milan, Italy. E-mail: batani@mib.infn.it
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Laser and Particle Beams
  • ISSN: 0263-0346
  • EISSN: 1469-803X
  • URL: /core/journals/laser-and-particle-beams
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