Abstract
Calibrated spectral measurements of the light emitted by a pulsed high-pressure mercury capillary lamp are presented. These pulsed lamps have been used in a previous work to pump a Rhodamine 6G laser. The measurements presented here show a very high efficiency in the blue and near UV part of the spectrum, suggesting that these lamps represent a very attractive pumping source for dye lasers emitting in the blue. In particular, as an example, a computation has been made for a basic solution of 4-MU yielding a spectral efficiency of 24%.
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References
P. Dal Pozzo, R. Polloni, O. Svelto: Appl. Phys.6 (1975)
F.E. Cartson, C.N. Clark: In:Applied Optics and Optical Engineering, ed. by R. Kingslake (Academic Press, New York 1965) Vol. 1, p. 52
It must be noted that this spectrum is not particularly accurate, since the width of the spectral lines is comparable to the resolving power of our monochromator
PEK Technical Bulletin CAP-11-A66
P.W.J.M. Boumans:Analytical Spectroscopy, Vol 1, part II (Marcel Dekker Inc. New York 1972) pp. 168–180
This is reasonable since the discharge time of the electrical energy of the capacitor (∼4μsec, see [1]) is much smaller than the emission time of the light pulse
We define as spectral efficiency the quantityΦ s =τ p ∫σ λ P λ dλ/σ p E el , whereσ λ is the absorption cross section of the material,σ p is its peak value andE el the total electrical energy discharged into the lamp. This is equal to the quantily Φ defined in [1] ifE el =τ p ∫P λ dλ i.e. if all electrical energy is transformed into radiant energy
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Dal Pozzo, P., Polloni, R. & Svelto, O. Pulsed mercury capillary lamps for dye laser pumping: Spectral measurements. Appl. Phys. 6, 341–344 (1975). https://doi.org/10.1007/BF00883652
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DOI: https://doi.org/10.1007/BF00883652