Dye laser pumped by an ultraviolet nitrogen laser

A comparative study is presented of the laser output characteristics of ten fluorescent solutes in different solvents, pumped with the 337.1 nm radiation from a 200 kW nitrogen laser. With both 2 mm and 10 mm dye path lengths, peak output powers of several kilowatts were obtained at wavelengths ranging from 350 to 600 nm and with pulse-widths as short as 0.5 nsec FWH M. The dependence of the laser characteristics on such variables as the concentration and the transmission of the solutions and the way of focusing the exciting radiation into the dye cavity were investigated. Three dye cells were made to lase in cascade, one of the stages with an efficiency of 50%.

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“…The three components reached 10 % of their peak values simultaneously within 0.4 nsec. A similar observation has been made with rhodamine 6G [5].…”

Section: Time Development Of Spectral Componentssupporting

confidence: 83%

“…The application of the N~-laser as a pumping source for dye lasers has been reported by Abakumov et al [4] and by Lidholt [5].…”

Section: Introductionmentioning

confidence: 93%

Scintillator and dye lasers in the range 350 to 600 nm pumped by a 200 kW nitrogen laser

Lidholt

Wladimiroff

1970

Opto-electronics

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“…1), and show great sensitivity to the solvent environment because of their ionizable characters. The photophysics of fluorescein derivatives is an active field of research because of their importance as laser materials [9][10][11][12][13][14] and as a solar energy concentrator [15] and probes to study biological systems [16]. As reported earlier [17][18][19][20], fluorescein-Na in its ground state can exist in four different forms, namely cation, neutral, monoanion and dianion, and hence it shows great sensitivity to the solvent environment (varied pH).…”

Section: Introductionmentioning

confidence: 99%

Dual fluorescence and laser emissions from fluorescein-Na and eosin-B

Math

Naik

Suresh

et al. 2006

Journal of Luminescence

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“…Preliminary results for two of the xanthene dyes have already been reported elsewhere [8]. Shortly thereafter, a number of other investigators reported using the nitrogen laser as a source for the rapid pumping of dyes to obtain lasing action [9,10]. The attractive features of the nitrogen laser as a pump source are (1) convenient repetition rates, (2) the fast rise of the excitation pulse (3 to 5 nsec) which prevents any substantial population of the triplet state [2,3,6] giving rise to laser quenching and (3) relatively little instantaneous heating due to short pump pulse widths (~ 8 to 10 nsec) and the absence of infra-red wavelengths (maximum energy per nitrogen laser pulse < 10 -~ m J).…”

Section: Introductionmentioning

confidence: 99%

Some characteristics of dye lasers with nitrogen laser pulse excitation

Gutfeld

Lankard

1970

Opto-electronics

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Results from experiments in which the ultraviolet pulses from a nitrogen laser are used to obtain laser action from organic dyes are described. The dyes include three in the xanthene group (rhodamine 6G, B, and sodium fluorescein) and two coumarins, 7-diethylamino-4-methylcoumarin and 7-N-dimethylamino-4, 6-dimethylcoumarin) in ethanol solvent. With these dyes, laser power is available over the entire visible range from 4200 to 6300 A when used with a rotatable diffraction grating. The range of tunability of one of the dyes was extended to ~ 1000 A by appropriate acidification. The spectral halfwidth of the light varied between 7 and 15 A over the range of tunability. Maximum repetition rates of 100 pps were obtained. Maximum power efficiency of ~ 25% was found for rhodamine 6G. Overall output pulse shapes were found to be in agreement with the theory of Sorokin et al. Output pulse widths varied from ~ 1 to 7 nsec. Other dyes which we have found to lase by this method of excitation include acridone, chloro-aluminium pthalocyanine and 4-methylumbelliferone. However, these dyes will not be discussed further in the text.

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Dye laser pumped by an ultraviolet nitrogen laser

Cited by 5 publications

References 4 publications

Scintillator and dye lasers in the range 350 to 600 nm pumped by a 200 kW nitrogen laser

Scintillator and dye lasers in the range 350 to 600 nm pumped by a 200 kW nitrogen laser

Dual fluorescence and laser emissions from fluorescein-Na and eosin-B

Some characteristics of dye lasers with nitrogen laser pulse excitation

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