Abstract

A cascade laser scheme is used to obtain continuous-wave 1.50-μm laser emission at room temperature on the normally self-terminating Tm^{3+ 3}H₄ → ³F₄ transition in YLiF₄. The long-lived ³F₄ state is quenched through energy transfer to the Ho^{3+ 5}I₇ state, which is depopulated through the Ho^{3+ 5}I₇ → ⁵I₈ 2.06-μm laser transition.

© 1991 Optical Society of America

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