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Modeling and CW operation of a quasi-three-level 946 nm Nd: YAG laser

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2 Author(s)
Tso Yee Fan ; Stanford University, Stanford, CA ; Byer, R.L.

A model is developed for an end-pumped quasi-three-level laser with population in the lower laser level at equilibrium such as for transitions to the manifolds4I9/2in Nd3+,4I15/2in Er3+,5I8in Ho3+and3H6in Tm3+. It is shown that the effect of residual lower laser level population on laser operation can be treated as a saturable loss. Room temperature operation on the4F3/2-4I9/2transition in Nd:YAG under CW dye laser pumping has been demonstrated with a threshold as low as 11.5 mW incident power and a slope efficiency of 7 percent with 0.3 percent output coupling. Performance is limited by the low output coupling and diffraction loss.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:23 ,  Issue: 5 )