Abstract
The single-pass gain of 4 · 10−5 mole/liter solutions of 3,3′-diethylthiatricarbocyanine iodide (DTTC) in methanol and 3,3′-diethylthiadicarbocyanine iodide (DTDC) in acetone, optically pumped by a giant pulse ruby laser, were measured as a function of pump power, wavelength, and time. The transverse pumping laser pulse was synchronized with a probing pulse from a dye laser. Both low-signal and saturated gain measurements were made in the wavelength range 7860–8066 Å for DTTC and 7059–7412 Å for DTDC dye. The pumping pulse widths at half-power were 15 ± 5 nsec, and the pumping power density was varied over a range of 0–7 MW/cm2. Using a steady-state theory, lifetime and cross sections for excited states were determined.
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This research is supported by the National Research Council of Canada. A summary of the present work was reported at the First All-Union Conference on Complex Organic Dye Lasers, Minsk, USSR, October 22–24, 1975.
Published in Zhurnal Prikladnoi Spektroskopii, Vol. 26, No. 3, pp. 487–496, March, 1977.
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Gillard, P.G., Nugent, S., Foltz, N.D. et al. Instantaneous gain and excited state absorption in two carbocyanine dyes. J Appl Spectrosc 26, 359–365 (1977). https://doi.org/10.1007/BF00617445
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DOI: https://doi.org/10.1007/BF00617445