Development of Compact 1.06 and 2.1 Micron Lasers.
Final rept. 30 Sep 93-31 Mar 96,
HOWARD UNIV WASHINGTON DC
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During the project period, extensive studies of the laser performance of a Nd and HoTm ions doped in YAG Y 3Al5O12, KGW KGd WO42 host crystals pumped by diode lasers operating in continuous wave or pulsed modes of operation. The diode lasers were temperature tuned to select the appropriate wavelengths to pump the Nd-ions at 785 nm. The laser action from these ions was observed at 1.06 and 2.1 micron, respectively. These laser actions were observed by using various pumping schemes such as end-pumping or side-pumping in different configurations such as fixed rod, rotating disks, and moving slabs. These configurations were used only in case of NdYAG or NdKGW laser crystals. For TmHoLuAG, only the rod configuration was used at low temperature to observe the laser action at 2.1 micron. A slightly improved laser performance as observed using the rotating disk or moving slab configurations as compared to the fixed configurations. The NdYAG and NdKGW laser experiments were also performed at very low temperature approx. 78 K. The laser performance from NdKGW at the low temperature was found to be slightly better than the NdYAG laser. These results have either been published or submitted for publication in refereed Journals.
- Lasers and Masers
- Inorganic Chemistry