We report optical guiding and laser action at around $1.9\mathrm{\mu m}$ in a ${\mathrm{Tm}}^{3+}$ -doped fluorogermanate glass waveguide fabricated using ultrafast laser inscription. A monolithic laser cavity was constructed by directly butt coupling dielectric mirrors to each facet of the $6.0\mathrm{mm}$ long ${\mathrm{Tm}}^{3+}$ -doped waveguide. When the waveguide was pumped by a Ti:sapphire laser tuned to $791\mathrm{nm}$ , laser oscillation was achieved at around $1.91\mathrm{\mu m}$ . This waveguide laser exhibited a maximum slope efficiency of 6% and a maximum output power of $32\mathrm{mW}$ when pumped with $620\mathrm{mW}$ of incident laser power.