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- W4242040964 abstract "It is very important to understand the characteristics of gain saturation for homogeneously broadened laser medium. Assuming a Lorentzian lineshape function with a linewidth of ΔνH, we have derived the analytical functions of the gain coefficient under three different conditions: 1) a small and 2) a large signal incident on the medium respectively, and 3) a small signal accompanied by a large signal simultaneously incident on the medium. We have found that the bandwidth Δν of the gain coefficient is equal to the linewidth ΔνH for condition 1) and 3) while it is Δ ν = 1 + I ν 1 / I s Δ ν H for condition 2). Here, I v 1 and Is are the intensity of the large signal and the saturation intensity at the center frequency Vo, respectively. The reasons are also presented for such results. For condition 2), gain saturation effect is strongly dependent on the frequency of the large signal: the more the frequency deviates from the center frequency, the weaker the gain saturation effect. This results an increase of the bandwidth. For condition 3), the intensity of the large signal only changes the distribution of populations on the upper and lower energy levels. Hence, the shape of the gain coefficient does not change with the gain reduction of the small signal, thus, its bandwidth remains the same." @default.
- W4242040964 created "2022-05-12" @default.
- W4242040964 creator A5032444194 @default.
- W4242040964 date "2007-01-01" @default.
- W4242040964 modified "2023-10-16" @default.
- W4242040964 title "Understanding the characteristics of gain saturation for homogeneously broadened laser medium from the point of view of the bandwidth" @default.
- W4242040964 doi "https://doi.org/10.1364/etop.2007.esb4" @default.
- W4242040964 hasPublicationYear "2007" @default.
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