Abstract

We report on the first observations, to our knowledge, of the ${ }^4{F}_{3/2}\to { }^4{I}_{11/2}$ (1060-nm) induced fluorescence in a Nd-doped $\mathrm{CaO}–{\mathrm{Al}}_2{\mathrm{O}}_3$ glass pumped by an 810-nm diode laser. This new doped glass is produced as a 3-mm-diameter sphere by heating and melting in an aerodynamic containerless trap and is rapidly solidified by radiative cooling ($>350$ K/s). This glass has an interesting ${\mathrm{Nd}}^{3+}$ emission maximum at 1067 nm (not many doped glasses have their emission maxima close to 1067 nm). The measured fluorescence decay time of the ${ }^4{F}_{3/2}$ level is short (0.3 ms) when the ion is excited by a narrow-band pulsed dye laser.

© 1997 Optical Society of America

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