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Intermodal tuning behavior of an etalon-tuned three-mirror TEA CO 2 laser

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2 Author(s)
Rob, Mohammad A. ; Dept. of Phys. Sci., Houston Univ., TX, USA ; Izatt, Jerald R.

The detailed tuning behavior within a single ro-vibrational line of a TEA CO2 laser was studied by using a wedged etalon and a pyroelectric array. The fine tuning of the laser was performed by using a temperature controlled etalon inside a three-mirror resonator. As the laser wavelength was scanned at a constant rate, single-longitudinal-mode pulses were observed ~82% of the time. Two-mode operation occurred over a narrow tuning range near the midpoint between successive cavity modes. The detailed structure of the staircase-like mode-to-mode tuning curve and the corresponding output intensity variations are explained using a simple theoretical model

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Quantum Electronics, IEEE Journal of  (Volume:28 ,  Issue: 1 )