Intra-Cavity Loss Element Method for Measurement of the Small Signal Gain of a TEA CO2 Laser (M. Aram, Z. Porhasannejad, E. Aghayare, & S. Behrouzinia, Trans.). (2012). International Journal of Fundamental Physical Sciences, 2(4), 58-60. https://doi.org/10.14331/ijfps.2012.330038