Spectral Characterization Of A Tunable Alexandrite Laser By Rubidium Absorption At 780 Nm

Andrew V. Nowak; Burton J. Krohn

doi:10.1117/12.976125

20 November 1985 Spectral Characterization Of A Tunable Alexandrite Laser By Rubidium Absorption At 780 nm

Andrew V. Nowak, Burton J. Krohn

Proceedings Volume 0540, Southwest Conf on Optics '85; (1985) https://doi.org/10.1117/12.976125
Event: 1985 Albuquerque Conferences on Optics, 1985, Albuquerque, United States

Abstract

Rubidium vapor was used to characterize the output of a tunable, pulsed alexandrite laser operating at 780 nm. Rubidium spectra were obtained at temperatures of 23, 50, 110, and 140°C. Excellent agreement was obtained with computer-synthesized spectra in which laser linewidth was the only free parameter. Each of the twelve hyperfine structure components of the rubidium 52P3/2 52S1/2 transition was represented by a Voigt profile while a Gaussian profile was assumed for the laser pulses. Optimum calculated values for the laser linewidth at a pumping energy 40% above threshold were 0.065 cm-1 and 0.035 cm-1 for the Q-switched pulse and for the free-running train of pulses, respectively. The laser output was found to be spectrally compact with no evidence of energy outside the narrow central feature.

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Andrew V. Nowak and Burton J. Krohn "Spectral Characterization Of A Tunable Alexandrite Laser By Rubidium Absorption At 780 nm", Proc. SPIE 0540, Southwest Conf on Optics '85, (20 November 1985); https://doi.org/10.1117/12.976125

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KEYWORDS

Rubidium

Fabry–Perot interferometers

Alexandrite lasers

Absorption

Pulsed laser operation

Q switching

Laser damage threshold

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