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Room temperature Dy:YLF laser operation at 4.34 μm

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2 Author(s)
Barnes, N.P. ; NASA Langley Res Center, Hampton, VA, USA ; Allen, R.

A Dy:YLF laser operating on the 6H11/2 to 6H13/2 transition at 4.34 μm and using a laser pumping scheme is reported. This pumping scheme is necessitated by the short upper-laser-level lifetime and the small effective stimulated-emission cross section. A suitable laser for this application is the Er:YLF laser operating at 1.73 μm. A simple model that approximates Dy:YLF laser performance well is presented. Results on laser performance, including a determination of the slope efficiency and threshold as a function of the output mirror reflectivity and a correlation of the pulse length with the laser output energy, are reported. Overall laser efficiency is found to be limited primarily by the ratio of the pump wavelength to laser output wavelength and the terminated four-level laser operation

Published in:

Quantum Electronics, IEEE Journal of  (Volume:27 ,  Issue: 2 )

Date of Publication:

Feb 1991

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