9 March 2007 Room temperature multi-wavelength operation in Er:YAlO3
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Room temperature, multi-wavelength operation in 2% doped Er:YAlO3 under flashlamp excitation is reported. Lasing occurred predominantly at 1.6625 &mgr;m and 1.6725 &mgr;m with the emission at the two wavelengths being orthogonally polarized. The use and orientation of an intracavity polarizer dictates the lasing wavelength in the laser. Temporal analysis of the two laser wavelengths shows that the onset of lasing at the two wavelengths is separated by ~14 &mgr;s with lasing at the 1.6625 &mgr;m wavelength occurring first. The 14 &mgr;s delay suggests that the 1.6625 &mgr;m emission is due to lasing on the 4S3/24I9/2 transition (4-level), while the 1.6725 &mgr;m emission is due to cascaded lasing on the 4I13/2 4I15/2 transition (3-level). Using a rotating mirror Q-switch, ~80 ns pulses at 10 mJ/pulse were generated. The wavelength of the Q-switched emission was determined to be at 1.6625 &mgr;m.
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S. Sharma, C. L. Vergien, R. K. Shori, O. M. Stafsudd, "Room temperature multi-wavelength operation in Er:YAlO3", Proc. SPIE 6451, Solid State Lasers XVI: Technology and Devices, 64510Q (9 March 2007); doi: 10.1117/12.716578; https://doi.org/10.1117/12.716578

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