Optical amplification properties of Dy3+-doped Gd2SiO4, Lu2SiO5 and YAl3(BO3)4 single crystals |
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Authors: | P Haro-González L L Martín I R Martín M Berkowski and W Ryba-Romanowski |
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Abstract: | Comparative investigation of the optical amplification properties of dysprosium doped Gd2SiO5, Lu2SiO5 and YAl3(BO3)4 single crystals was performed in a pump-and-probe experiment. High power laser pulses at 475 nm were used as the pump source
in order to strongly populate the 4F9/2 level of the Dy3+ ions due to ground state absorption. Low signal beam cw radiation at 574 nm was used as the probe beam to stimulate the emission
associated with the 4F9/2→6H13/2 electronic transition of the Dy3+ ions. The process was modelled as a three levels system, and their populations were analysed and simulated in order to study
the gain dynamics. Positive optical gain was observed and compared in these crystals. These results confirmed that among the
systems studied the Dy3+-doped YAl3(BO3)4 single crystal can be considered as a good candidate to develop an optical amplifier employing the 4F9/2→6H13/2 transition at around 574 nm which is the first step to consider as laser active media. |
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