Stimulated-emission cross sections of the ^5F_1–^5I_5 and ^5F_1–^5I_6 transitions of Pm^3+ in a phosphate glass

We report a laser cavity measurement of stimulated-emission cross sections for both the (5)F(1)-(5)I(5) (0.93-microm) and (5)F(1)-(5)I(6) (1.1-microm) laser transitions of Pm(3+) ions in a lead-indium-phosphate glass host. The measured cross sections for these two transitions are 1.8 x 10(-20) (+/-11%) and 2.8 x 10(-20) cm(2) (+/-22%), respectively. These values agree with previously reported values based on a Judd-Ofelt-type analysis of spectroscopic data.