Lasing properties and nonlinearities of dyes under high power pumping

M Milani, L Ferraro, F Causa, D Batan

Research output: Contribution to journalArticle

3 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)557-566
Number of pages10
JournalLaser and Particle Beams
Volume25
Issue number4
DOIs
Publication statusPublished - 2007

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Pumping (laser)
lasing
pumping
Dyes
dyes
nonlinearity
nitrogen lasers
rhodamine
Superradiance
Nitrogen
Lasers
Discharge (fluid mechanics)
Atmospheric pressure
atmospheric pressure
energy distribution
Mirrors
flux density
Pumps
pumps
mirrors

Cite this

Lasing properties and nonlinearities of dyes under high power pumping. / Milani, M; Ferraro, L; Causa, F; Batan, D.

In: Laser and Particle Beams, Vol. 25, No. 4, 2007, p. 557-566.

Research output: Contribution to journalArticle

Milani, M ; Ferraro, L ; Causa, F ; Batan, D. / Lasing properties and nonlinearities of dyes under high power pumping. In: Laser and Particle Beams. 2007 ; Vol. 25, No. 4. pp. 557-566.
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