Abstract

We report 784-nm (${{}^{1}G}_4\to {{}^{3}H}_5$ transition) amplified spontaneous emission (ASE) from ${\mathrm{Tm}}^{3+}$-doped fluoride $\left({\mathrm{ZrF}}_4–{\mathrm{BaF}}_2–{\mathrm{LaF}}_3–{\mathrm{AlF}}_3–\mathrm{NaF}\right)$ glass fiber pumped by an 1120-nm fiber laser. To our best knowledge, this is the first report of 784-nm (${{}^{1}G}_4\to {{}^{3}H}_5$ transition) ASE in a ${\mathrm{Tm}}^{3+}$-doped fluoride fiber laser. Its effects on a 480-nm (${{}^{1}G}_4\to {{}^{3}H}_6$ transition) blue laser were also discussed.

© 2005 Optical Society of America

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