Characterization of spectral hole depth in Tm³⁺:YAG within the cryogenic temperature range

Abstract

In this paper, spectral hole depth dependence on temperature below 10 K in Tm3+:YAG crystal is investigated in detail. A novel model is proposed to analyze the temperature dependence on the spectral hole. By using the proposed model, we theoretically deduce the temperature dependence of spectral hole depth. The results are compared with experimental results and they are in good agreement. According to the theoretic results, the optimum temperature in experiment can be found.

Improving the intensity and efficiency of compressed echo in rare-earth-ion-doped crystal

“…With the decrease of the temperature (ultralow temperature of 3-4 K), the line shape of the homogeneous broadening becomes sharper, which makes Γ h narrower and enhances T 2 at the same time. [16,17] The population lifetime T 1 is decided by the wavelength of the excited state in the two-level system. According to Eq.…”

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