13 August 1993 Universal presentation of laser gain saturation laws
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Proceedings Volume 1868, Laser Resonators and Coherent Optics: Modeling, Technology, and Applications; (1993) https://doi.org/10.1117/12.150606
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
Three gain saturation laws are frequently used to describe the light energy propagation in laser amplifiers: two assigned to Rigrod, referring to homogeneous and inhomogeneous laser line. The third assigned to Frantz-Nodvick law. We show that under lossless medium conditions, and for both small signal and saturation regimes the laws can be presented uniformly as: Yout equals Yin(DOT)exp(go(DOT)L) where Y is a function of the normalized intensity I, which is the ratio of light intensity to saturation light intensity. The saturation intensity and the dependence of Y on I are different for each of the laws, but for all cases Y approaches I in the small-signal regime. We provide approximate analytical expressions, for the inverse function I(Y) for the two Rigrod laws, facilitating a one-step integration of the gain saturation laws.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mordechai Lando, Shlomo Eisenbach, Shimon Gabay, "Universal presentation of laser gain saturation laws", Proc. SPIE 1868, Laser Resonators and Coherent Optics: Modeling, Technology, and Applications, (13 August 1993); doi: 10.1117/12.150606; https://doi.org/10.1117/12.150606

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