Multiphonon relaxation rate from pumped level to upper laser level in YAG:Nd |
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Authors: | T Kushida S Kinoshita T Ohtsuki T Yamada |
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Institution: | Department of Physics, Osaka University, Toyonaka, Osaka 560, Japan |
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Abstract: | The rise time of the near-infrared fluorescence intensity has been measured in YAG:Nd3+ at room temperature under the excitation by 10 ns duration pulses at 514.5 nm using a time-correlated single photon counting method. The result reveals that the relaxation rate from the pumped level ( + + to the upper level laser level is larger than 108s?1, which is in contrast with the previously reported values of (1.6 ~ 2) × 106s?1. An experiment to search for the visible emission in YAG:Nd3+ gives support to the present value. |
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